WO2000036122A1 - Procede de fabrication de l'apeline - Google Patents
Procede de fabrication de l'apeline Download PDFInfo
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- WO2000036122A1 WO2000036122A1 PCT/JP1999/006903 JP9906903W WO0036122A1 WO 2000036122 A1 WO2000036122 A1 WO 2000036122A1 JP 9906903 W JP9906903 W JP 9906903W WO 0036122 A1 WO0036122 A1 WO 0036122A1
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- apelin
- peptide
- terminus
- salt
- reaction
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- C07K14/46—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates
- C07K14/47—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2319/00—Fusion polypeptide
Definitions
- the present invention relates to a method for producing aperin or a salt thereof by producing a fusion protein or polypeptide and then subjecting the fusion protein or polypeptide to a peptide bond cleavage reaction. Furthermore, N-terminal optionally oxidized methionine residue or diketone of the methionine residue can be efficiently removed from apelin having an optionally oxidized methionine residue or its salt. How to do it. Background art
- the peptide When a peptide is produced using a genetic recombination technique, the peptide is often expressed in the form of a fusion protein because the peptide is susceptible to degradation in cells.
- the target peptide can be cleaved from the fusion protein by a method of chemically cleaving with bromocyan (Itakura et al., Science, 198, 1056 (1977)) and a method of cleaving enzymatically by using Factor Xa (Nagai Methods in Enzyraolgy, 153, 46 (1987)).
- the higher order structure, biological activity, and stability of the protein may be different from the molecular species with methionine added to the ⁇ terminus and the molecular species without methionine at the ⁇ terminus. It is possible that the addition to the protein may result in increased antigenicity. Therefore, from the viewpoint of industrial use, it is meaningful to establish a method for removing the terminal methionine corresponding to this start codon. It is considered to be.
- the present inventors have eagerly studied a method for efficiently producing a novel physiologically active peptide, averine (Biochem. Biop. Res. Co. un., 251, 471-476, (1998)) or a salt thereof. After examination, a protein or polypeptide having a cysteine at the ⁇ -terminus and a fusion protein or polypeptide having an apelin linked to the ⁇ -terminus of the polypeptide were produced, and then subjected to a reaction for cleaving the peptide bond. It has been found that apelin can be produced efficiently.
- aperin having a methionine residue which may be oxidized at the N-terminus represented by the formula (I) as shown in the following scheme 1 includes, for example, By reacting dalioxylic acid, a di-diketone, copper sulfate capable of donating a transition metal ion, and pyridine, a base (eg, amines), the transamination reaction of the methionine residue is carried out.
- An apelin having a diketone is reacted with a base (eg, diamines) 3,4 diaminobenzoic acid to carry out a hydrolysis reaction, whereby an apelin having a diketone having a methionine residue is converted into a diketone having a methionine residue.
- a base eg, diamines
- 3,4 diaminobenzoic acid to carry out a hydrolysis reaction, whereby an apelin having a diketone having a methionine residue is converted into a diketone having a methionine residue.
- m represents an integer of 0 to 2
- X represents a peptide chain of apelin.
- m is as defined above], wherein the partial structure represented by “a diketone of a methionine residue which may be oxidized” or “a diketone of a methionine residue”;
- a compound represented by the general formula (III) is referred to as “apelin or a salt thereof having no methionine residue which may be oxidized at the N-terminus” or “methionine optionally oxidized at the N-terminus "Aperine having no diketone residue or a salt thereof”.
- a fusion protein or peptide having a cysteine residue at the N-terminus of a protein or peptide having a cysteine residue at the N-terminus and an aperin optionally having an optionally oxidized methionine residue at the N-terminus is linked to A method for producing averine or a salt thereof, which is characterized by subjecting the peptide to a cleavage reaction of a peptide bond on the amino group side,
- the transformant is cultured to express a fusion protein or peptide, and the expressed fusion protein or peptide is subjected to a cleavage reaction of a peptide bond on the amino group side of a cysteine residue, wherein a methionine residue is present at the N-terminus.
- a method for producing apelin or a salt thereof which may have a group
- the cleavage reaction is a reaction subjected to an S-cyanation reaction followed by a hydrolysis reaction.
- apelin is a polypeptide containing an amino acid sequence represented by SEQ ID NO: 1,
- a method for removing methionine residues comprising reacting apelin or a salt thereof having an optionally oxidized methionine residue at the N-terminus with a hydiketone, followed by hydrolysis.
- (22) a method for producing apelin or a salt thereof, comprising hydrolyzing the compound according to (21), and
- FIG. 1 shows the reaction mechanism in the reaction step of the present invention.
- FIG. 2 shows the DNA fragment used in Example 1.
- FIG. 3 shows a schematic diagram for producing the double-chain human hyperpelin-36 obtained in Example 1.
- FIG. 4 shows a construction diagram of the plasmid pTB960 13 obtained in Example 2.
- the apelin used in the method of the present invention includes, for example, human aperin-36 (SEQ ID NO: 1) described in Biochem. Biopys. Res. Commun., 251, 471-476, (1998).
- Polypeptide polypeptide represented by amino acid sequence at positions 24-36 of SEQ ID NO: 1
- ⁇ -terminal amino acid (Gin) of apelin-13 was pyroglutamine-oxidized Peptides and the like. Any peptide may be used as long as it has a ligand activity to AP J (O'Dowd. BF, et al., Gene, 436, 355-359, 1993).
- a receptor containing an amino acid sequence identical or substantially identical to the amino acid sequence represented by SEQ ID NO: 3 described in WO 99/33976 Japanese Patent Application No. 10-364656
- the apelin of the present invention also includes those in which the N-terminal side of G1n is cleaved in a living body and the G1n is pyroglutamine-oxidized.
- the peptide has a N-terminus (amino terminus) at the left end and a C-terminus (carboxyl terminus) at the right end according to the convention of peptide labeling.
- the R of the ester or alkylamide for example methyl, Echiru, n- propyl, d-6 alkyl group such as isopropyl or n- butyl, cyclopentyl, C 3, such as cyclohexyl - 8 cycloalkyl group, phenyl, alpha - C 6, such as naphthyl - 12 Ariru group, benzyl, phenethyl, phenylene Lou C such as benzhydryl, one 2 alkyl, or ⁇ - naphthylmethyl etc. ⁇ - Nafuchiru CI - two alkyl Which C 7 4 Ararukiru other groups, such as Pibaroiruo carboxymethyl esters generally used as oral esters.
- a salt with a physiologically acceptable base for example, an alkali metal or the like
- an acid organic acid or inorganic acid
- a physiologically acceptable acid addition salt is used.
- Such salts include, for example, salts with inorganic acids (eg, hydrochloric acid, phosphoric acid, hydrobromic acid, sulfuric acid) or organic acids (eg, acetic acid, formic acid, propionic acid, fumaric acid, maleic acid, succinic acid) , Tartaric acid, citric acid, malic acid, oxalic acid, benzoic acid, methanesulfonic acid, benzenesulfonic acid).
- inorganic acids eg, hydrochloric acid, phosphoric acid, hydrobromic acid, sulfuric acid
- organic acids eg, acetic acid, formic acid, propionic acid, fumaric acid, maleic acid, succinic acid
- Tartaric acid citric acid, malic acid, oxalic acid
- cysteine may be provided at the N-terminal by a method known per se.
- the protein or peptide having a cysteine at the N-terminus preferably has a molecular weight of 100 to L00000, and more preferably has a molecular weight of 300 to 50,000.
- the protein or peptide having a cysteine at the N-terminus preferably has 1 to 1000 amino acids, and more preferably has 3 to 500 amino acids.
- the protein or peptide examples include various growth factors such as inulin ferrons, interleukins, fibroblast growth factors (aFGF, bFGF, etc.), (pro) perkinase, lymphotoxin, Tumor Necrosis Factor (TNF), enzymatic proteins such as 3-galactosidase, storage proteins, streptavicin, protein A, protein G, Tissue Plasminogen Act ivator (TPA), these mucins or some of them ( (Fragments) and others that have cysteine at the end.
- fibroblast growth factor (aFGF, bFGF, etc.) or a mutin thereof or a part (fragment) thereof is preferably used.
- the base sequence represented by R is linked to the DNA base sequence (SEQ ID NO: 2) coding for a polypeptide containing human apelin-136 via the base sequence coding for cysteine.
- a DNA (plasmid) having an ATG at the 5 'end and a region encoding the fusion protein downstream thereof and a translation stop codon downstream of the ATG is obtained by chemically synthesizing or genetically engineering the known protein. It can be produced by processing cDNA or chromosome-derived DNA of the protein.
- the gene encoding the fusion protein or peptide having a cysteine at the N-terminus or an aperin linked to the N-terminus of the peptide of the present invention can be obtained by using conventional DNA techniques, for example, site-directed mutagenesis. Can be converted to a gene that codes the mutin.
- a plasmid used as a vector may be, for example, pBR322 derived from Escherichiacoli [Gene,, 95 (197) 7)], pBR 3 13 [gene,, 75 (1977)), pBR 324, pBR 325 [gene, A, 1 24 (1978)), PBR 327 , pBR3 28 [gene, _ ⁇ , 287 (1 980)], pBR32 9 [gene,, 79 (1 982)), pKY2 289 [gene, J_, 1 (1 978)], KY270 (biochemistry, ⁇ _2_, 770 (1980)), pACYC177, pACYC184 (Journal 'ob' bacteriology (Journal of Bacteriology), 134, 1 1 4 1 (1 978)), pRK248, pRK64 6, pDF [Metho
- the DNA preferably has a promoter at the upstream of ATG, and the promoter may be any promoter as long as it is an appropriate promoter corresponding to the host used for the production of the transformant. .
- S PO 1 promoter examples include promoters, penP promoters and the like, such as PHO5 promoter, PGK promoter, GAP promoter and ADH promoter in yeast (Saccharomyces cerevisiae), and promoters derived from SV40 in animal cells. If necessary, a Shine and Dalgarno (SD) sequence may be inserted downstream of the promoter.
- the 7 promoters include the 17 promoters found on T7D [; L.
- a terminator operating in an E. coli system preferably a ⁇ terminator [FW Studier et al., J. Mol. Biol., 189: 113-130 (1986)] Is used.
- T7 RNA polymerase gene examples include the T7 gene [FW Studier et al., J. Mol. Biol., 189: 113-130 (1896)].
- the vector is preferably constructed by incorporating a T7 promoter and a T7 terminator into the above vector.
- Such vectors include pET-1, ET-2, pET-3, pET-4, and pET-4. — 5 [AH Rosenberg, Gene _5_6: 1 2 5—
- the transformant of the present invention can be prepared by subjecting the expression plasmid obtained by the above method to a method known per se [eg, Cohen S, N, et al., Prosessing ',' National 'Academy', 'Science' (Pro Natl. Acad. Sci. USA), 69, 2110 (1972)].
- Examples of the host of the microorganism to be transformed include Escherichia sp., Bacillus sp., Yeast, and animal cells.
- Escherichia bacteria examples include Escherichia coli (Escherichia coli), and specifically, Escherichia coli (Escherichia coli) K12 DH1 [Proceedings of National Academy of Korea] Pro Atl. Acad. Sci. USA, 6_0, 160 (1968)], JM-103 [Nucleic Acids Research], 309 ( 1 9 8 1)], JA
- Bacillus subtilis examples include Bacillus subtilis. Specifically, Bacillus subtilis M1114 (Gene, 2_4, 255 (1 983)), 207-21 [Journal of Obb. 'Journal of Biochemistry, _9_5, 87 (1984)].
- yeast examples include, for example, Saccharomyces cerevisiae. Specifically, Saccharomyces cerevisiae AH22 [Proc. Natl. Acad. Sci. USA, 75, 1929 (1978)], XSB52 -23 C [Proc. Natl. Acad. Sci. USA, 7_7_2173 (1980)], BH-641 ACATCC 28339), 20B-12 [Genetics, 85, 23 (19
- animal cells examples include monkey cell COS-7 [Cell, _23_, 175 (1
- the host of the transformant is ⁇ 7 RNA polymerase gene ( ⁇ 7 gene 1) [FW Studier et al., J. Mol. Biol. ⁇ 89: 113-130 (1986)] Escherichia coli strains, such as MM 294,
- DH-1, C600, JM109, BL21, or T7 RNA polymerase Any strain, such as an Escherichia coli strain in which the gene (T7 gene 1) has been integrated with another plasmid, may be used.
- MM 294 strain and BL21 strain in which ⁇ phage into which ⁇ 7 gene 1 has been incorporated are lysogenized are used.
- the promoter of the T7 gene 1 a lac promoter whose expression is induced by isopropyl-1-thio-1) 3-D-galactopyranoside (may be abbreviated as IPTG) is used.
- Transformation of a bacterium of the genus Bacillus as a host can be performed according to a known method such as, for example, Molecular and General Genetics (Molecular and General Genetics), 168, ⁇ 1 (1979).
- Transformation using a yeast as a host can be performed according to a known method such as Pro atl. Acad. Sci. USA, 75, 1929 (1978).
- Transformation using an animal cell as a host can be performed according to a known method such as, for example, Virology (Vi r 01 ogy, 52, 456 (1973)).
- the fusion protein can be produced by culturing the above transformant in a medium and collecting the produced fusion protein.
- the pH of the medium is preferably about 6-8.
- Examples of the culture medium for culturing the genus Escherichia include, for example, an M9 culture medium containing glucose and casamino acid CMiller, Journal of Experimen in 'Journal of Experiments in Molecular Genetics', 431-433, Cold Spring Harbor Laboratory, New York 1972)). If necessary, a drug such as, for example, 3; 3-indolylacrylic acid or isopropyl / 3-D-thiogalactopyranoside (IPTG) can be added to make the promotion work efficiently.
- IPTG 3-indolylacrylic acid or isopropyl / 3-D-thiogalactopyranoside
- culturing is usually performed at about 15 to 43 for about 3 to 24 hours, and if necessary, aeration and stirring may be added.
- the cultivation is usually carried out at about 30 to 40 ° C for about 6 to 24 hours, and if necessary, aeration and stirring can be applied.
- Burkholder's minimal medium When culturing a transformant whose host is yeast, for example, Burkholder's minimal medium [Bostian, KL et al., Prossings of National Academy of Sciences (Proc. Natl. Acad. Sci.) USA, 77, 4505 (1980) 3.
- the pH of the medium is preferably adjusted to about 5-8.
- the cultivation is usually performed at about 20 ° C to 35 ° C for about 24 to 72 hours, and aeration and stirring are added as necessary.
- the medium When culturing a transformant in which the host is an animal cell, the medium may be, for example, a MEM medium containing about 0.2 to 20%, preferably about 5 to 20% of fetal bovine serum [Science, 122, 501 (1952)), DME medium [Virology, 8, 396 (1959)], RPMI 1640 medium [Journal of the American Medical Association (Journal of the American Medical Association) ), m, 519 (1967)], 199 medium [Proceeding of the Society for the Biologcal Medicine, 73, 1 (1950)], etc. Is raised.
- the pH is about 6-8. Culture is usually performed at about 30 to 40 ° C for about 15 to 60 hours, and aeration and agitation are added as necessary.
- the fusion protein can be produced by culturing the above transformant, producing and accumulating the fusion protein in a culture, and collecting this.
- M9 medium containing glucose and casamino acid Miller, J., Expermentin 'Molecular' Genetics (Experiments in Molecular Genetics), 431-433 (Cold Spring Horbor Laboratort, New York 197) 2)
- 2 XYT medium 2 XYT medium [Messing, Methods in Enzymology, 101, 20 (1983)] LB medium and the like.
- Culture is usually performed at about 15 to 43 t: for about 3 to 24 hours, and if necessary, aeration and stirring may be added.
- the culture is performed at a temperature of about 15 to 36, preferably about 30 to 36 t, Preferably, the inactivation of the Ac Its reactor is performed at about 37 ° C. to 42 t.
- a drug such as mitomycin C, naldixic acid, or irradiate ultraviolet rays, or The pH of the culture solution may be changed to the alkaline side.
- T7 promoter system When using the T7 promoter system, (1) when expressing the T7 gene (RNA polymerase gene) linked downstream of the lac promoter, add IPTG or the like; or (2) due and this is to raise the temperature of the culture when expressing the lambda P L T 7 which is connected downstream of the promoter gene (RNA polymerase gene), specifically T by T 7 phage RNA polymerase 1 to produce 7 Activate the Promo All Day.
- T7 gene RNA polymerase gene
- the cells are collected by a known method, suspended in a buffer, for example, treated with a protein denaturant, treated with an enzyme such as lysozyme, sonicated, treated with glass beads, French pressed, frozen and thawed.
- a buffer for example, treated with a protein denaturant, treated with an enzyme such as lysozyme, sonicated, treated with glass beads, French pressed, frozen and thawed.
- the cells are disrupted by a treatment or the like, and a supernatant is obtained by a known method such as centrifugation.
- a generally known protein purification method may be used. For example, gel filtration, ion exchange chromatography, adsorption chromatography, high performance liquid chromatography, affinity chromatography, hydrophobic chromatography, electrophoresis and the like can be appropriately combined.
- a methionine derived from the translation initiation codon may be added to the N-terminus of the fusion protein obtained here.
- the fusion protein may proceed to the next reaction step without purification or in a partially purified state.
- the thus obtained fusion protein or peptide is subjected to a cleavage reaction of the peptide bond on the amino group side of the cysteine residue.
- the cleavage reaction include an S-cyanation reaction and a hydrolysis reaction.
- the cleavage reaction includes, for example, performing S-cyanation reaction followed by ammonolysis.
- the S-cyanation reaction is carried out by reacting a starting compound with an S-cyanation reagent.
- S-cyanation reagent examples include 2-nitro-5-thiocyanobenzoic acid (NTCB), 1-cyano-14-dimethylaminopyridinium salt (DMAP-CN), and CN ion.
- NTCB 2-nitro-5-thiocyanobenzoic acid
- DMAP-CN 1-cyano-14-dimethylaminopyridinium salt
- CN ion examples include 2-nitro-5-thiocyanobenzoic acid (NTCB), 1-cyano-14-dimethylaminopyridinium salt (DMAP-CN), and CN ion.
- the amount of the S-cyanation reagent may be about 2 to 50 times the total thiol group. More preferably, the amount is about 5 to 10 times.
- the reaction temperature may be any as long as it is between about 0 ° and 80 ° C., and more preferably between about 0 ° and 50 °.
- Solvents that do not react with the S-cyanation reagent Any buffer may be used, provided that it is, for example, Tris-HCl buffer, Tris-Acetate buffer, Phosphate buffer, Borate buffer, and the like.
- the organic solvent may be present as long as it does not react with the S-cyanation reagent.
- the reaction is preferably performed between ⁇ 1 and 12.
- the pH is preferably 7 to 10
- DMAP-CN is used
- the pH is preferably 2 to 7 to prevent the SS exchange reaction.
- a denaturant such as guanidine hydrochloride may be present in the reaction solution.
- the hydrolysis treatment is performed.
- the alkali treatment is performed by adjusting the pH of the aqueous solution containing the starting compound to 7-14.
- the pH is adjusted by using a solution of, for example, sodium hydroxide, ammonia, an amino compound, trimbase (tris [hydroxymethyl] -aminomethane), sodium phosphate dibasic, potassium hydroxide, barium hydroxide, or the like.
- a solution of, for example, sodium hydroxide, ammonia, an amino compound, trimbase (tris [hydroxymethyl] -aminomethane), sodium phosphate dibasic, potassium hydroxide, barium hydroxide, or the like An appropriate amount is added to an aqueous solution containing the compound, and sodium hydroxide is particularly preferable.
- the concentration of the solution during the above reaction is, for example, about 0.
- the reaction temperature may be any temperature as long as it is between about -20 and 80 ° C, and more preferably between about -10 and 5.
- the reaction time is preferably about 1 to 60 minutes, preferably about 15 to 30 minutes for the S-cyanation reaction, about 5 minutes to 100 hours, preferably about 10 minutes to 15 hours for the hydrolysis reaction, and about 5 minutes for ammonolysis. Minutes to 24 hours, preferably about 10 to 180 minutes. It is thought that the reaction shown in [Fig. 1] occurs by the above-mentioned S-cyanation or hydrolysis.
- X is R 1 — (NR 2 ) — (wherein R 1 and R 2 are the same or different, and (i) hydrogen, (ii) (3, -2.
- alkyl examples include, for example, methyl, ethyl, propyl, isopropyl, butyl, sec-butyl, pentyl, isopentyl, neopentyl, 1-ethylpentyl, hexyl, isohexyl, heptyl, octyl, nonanyl, denonyl, Pendeneil, dodecanil, tetradecanyl, pentadecanil, hexadekael, hepdecaneil, octadecanyl, nonadecanyl, eicosanil and the like.
- the C 3 - Examples of 8 cycloalkyl e.g., cyclopropyl, Shikuropuchi Le, cyclopentyl, cyclohexyl, cycloheptyl cyclohexane, etc. Shikurookuchiru the like.
- Examples of the above C 6 , 4 aryl include phenyl, naphthyl, anthryl, phenanthril, and acenaphthylenyl.
- d-3 alkyl such as benzyl, Fuenechi relay, 3-phenylpropyl, (1 one-naphthyl) methyl, (2-naphthyl) methyl and the like.
- the C, - as an example of a s-alkoxy for example methoxy, ethoxy, Purobokishi, butoxy, Penchiruokishi, etc. Kishiruokishi the like to.
- Examples of the above-mentioned optionally substituted amino substituent (iii) include, for example, amino acids, peptides consisting of 2 to 10 amino acids, and the like.
- the amino acid may be L-integrated or D-isomer, and examples thereof include, for example, Ala, Arg, Asp, Asn, Glu, Gin, Gly, His, lie, Met, Leu, Lys, Phe, Pro, Ser, Thr, Trp, Tyr, Val and the like.
- Examples of the peptide include, for example, HD-Leu-Leu-Arg-Pro-NH-C 2 H 5 , H-Val-Al-Leu-D-Al a-Al a-Pro-Leu-Al a-Pro -Arg-OH and the like.
- the isolated target peptide may be isolated according to a generally known peptide purification method. For example, gel filtration, ion exchange chromatography, high speed Liquid chromatography, affinity chromatography, hydrophobic chromatography, thin-layer chromatography, electrophoresis, etc., can be combined as appropriate.
- a methionine derived from the translation initiation codon may be added to the N-terminus of the target peptide obtained here.
- ⁇ -diketones such as glyoxylic acid may be added according to the method described in detail below.
- the methionine residue which may be oxidized indicates a methionine residue or an S-oxidized form thereof, and examples of the S-oxidized form of the methionine residue include sulfoxides and sulfone forms.
- ⁇ Aperin having an optionally oxidized meteonin residue at its terminal includes:
- m represents an integer of 0 to 2
- X represents a peptide chain of apelin. And these may form a salt. Examples of the salt include those similar to the above-mentioned apelin salt.
- the apelin having a methionine residue which may be oxidized at the N-terminus or a salt thereof may be an aperin having a methionine residue which may be oxidized at the N-terminus or a salt thereof produced by genetic engineering. preferable.
- m is preferably 0.
- the peptide chain of apelin represented by X includes the above-mentioned apelin.
- apelin or a salt thereof may be refolded (activated, regenerated) before or after subjecting to a step of removing an N-terminal optionally oxidized methionine (Met) residue or a diketone of the methionine residue. ) Can be performed.
- Apelin having a diketone body of a methionine residue which may be oxidized at the N-terminus or a salt thereof can be obtained by various reactions such as a chemical reaction or an enzymatic reaction.
- a diketone of a methionine residue which may be oxidized at the N-terminus by a transamination reaction of reacting apelin having a methionine residue which may be oxidized at the N-terminus or a salt thereof with diketones To obtain apelin or a salt thereof.
- ⁇ -diketones may be any as long as they can promote the transamination reaction of the above-mentioned apelin or a salt thereof.
- the formula R 1 -CO-CO-R 2 [wherein R 1 represents hydrogen or a lower alkyl or phenyl group (preferably hydrogen or methyl, more preferably hydrogen) which may be substituted with a carboxyl group; R 2 represents a group substituted with a hydroxyl group, a lower alkoxy group or a lower alkyl; A good amino group (preferably a hydroxyl group). Or a salt thereof.
- the lower alkyl group represented by R 1 includes alkyl having about 1 to 6 carbon atoms such as methyl, ethyl, propyl, i-propyl, butyl, i-butyl, sec-butyl and t-butyl.
- the lower alkoxy group represented by R 2 include methoxy, ethoxy, propoxy, i-propoxy, butoxy, i-butoxy, sec-butoxy, t-butoxy and other carbon-containing groups having about 1 to 6 carbon atoms.
- an alkoxy group examples of the amino group optionally substituted with lower alkyl represented by R 2 include the above-mentioned amino group optionally having one or two lower alkyl groups represented by R 1 .
- the salt include those similar to the above-mentioned salts of apelin having a methionine residue which may be oxidized at the N-terminus.
- ⁇ -diketones include glyoxylic acid, pyruvic acid, oxalic acetic acid, phenyldalioxylic acid, and 2-oxodaltalic acid. Of these, glyoxylic acid is preferably used.
- the ⁇ -diketones may form a salt, and examples thereof include salts of alkali metal such as sodium salt and potassium salt, and salts of inorganic acids such as hydrochloride.
- the transamination reaction between aperin or a salt thereof having an optionally oxidized methionine residue and an ⁇ -diketone is usually performed in an amount of 10,000 to 10,000 mol per mol of aperin or a salt thereof ( About 200 to 4000 moles of the diketone is added at about 0 to 70 ° C (preferably about 20 to 40 ° C) for about 10 minutes to 5 hours (preferably about 2 to 40 hours). (0 minutes to 2 hours)
- the reaction is carried out.
- Any buffer eg, phosphate buffer, acetate buffer, citrate buffer, etc.
- the pH of the reaction is adjusted to about 2 to 9, especially about 4 to 7, especially about 5 or 6, and the reaction is allowed to proceed.
- the heiketone In order to accelerate the amino transfer reaction, it is preferable to react the heiketone in the presence of a transition metal ion.
- the amount of the diketone is from 0.001 to 0.1 mol per 1 mol of the diketone ( Preferably, about 0.01 to 0.05 mol) of a transition metal ion is used.
- transition metal ions include copper ions (Cu +, Cu 2+ ), cobalt ions (Co 2+ , Co 3+ ), nickel ions (Ni 2+ , Ni 3+ ), iron ions (Fe 2+ , Fe 3+ ), zinc ion (Zn 2+ ), aluminum ion (A1 3+ ), manganese ion (Mn 2+, etc.), gallium ion (Ga 3+ ), indium ion (In 3+ ), magnesium ion (Mg 2+ ), calcium ion (Ca 2+ ) and the like can be used, and among them, copper ion, cobalt ion and the like, particularly, copper ion (Cu 2+ ) are preferably used.
- transition metal ions are usually added to the reaction solvent as salts with inorganic acids such as sulfuric acid, nitric acid, hydrochloric acid, and perchloric acid, or salts with organic acids such as acetic acid, oxalic acid, citric acid, and carbonic acid.
- inorganic acids such as sulfuric acid, nitric acid, hydrochloric acid, and perchloric acid
- organic acids such as acetic acid, oxalic acid, citric acid, and carbonic acid.
- copper sulfate, copper acetate, especially, copper sulfate is preferably used.
- the diketones are preferably reacted in the presence of a base.
- a base usually, about 0.1 to 20 mol (preferably 0.5 to 10 mol) of a base is added to 1 mol of the diketone.
- the base for example, Alkylamines such as triethylamine and triptylamine, and aromatic amines such as N, N-dimethylaniline, pyridine, lutidine, collidine, 4- (dimethylamino) pyridine and imidazole can be used, with pyridine being preferred. Used.
- aperin or a salt thereof having an optionally oxidized methionine residue at the N-terminus during the transamination reaction, and methionine residue obtained by the amination reaction of the aperin or a salt thereof.
- a buffer solution for transamination reaction it is preferable to add urea to the buffer so as to have a concentration of preferably about 1 to 8 M, more preferably about 3 to 6 M.
- a hediketone in the presence of a transition metal ion and a base, and practically, three components of a transition metal ion, a base and a hediketone (for example, A mixture containing copper sulfate, pyridine, and dalioxylic acid) is added to an aqueous solution containing apelin having a methionine residue which may be oxidized at the N-terminus or a salt thereof, and transamination is performed. To progress.
- m represents an integer of 0 to 2
- X represents a peptide chain of apelin.
- a salt thereof (averine having a diketone form of a methionine residue or a salt thereof) is a known means for purifying peptides or proteins, for example, extraction, salting out, partitioning, partitioning, recrystallization, chromatography, etc. Can be isolated and purified from the reaction solution, but can be directly subjected to the next hydrolysis reaction.
- Apelin having a diketone form of methionine obtained by transamination or a salt thereof is usually subjected to a hydrolysis reaction with a base to give an optionally oxidized N-terminal methionine residue or the methionine residue. Can be converted to apelin having no diketone or a salt thereof.
- the base used in the hydrolysis reaction include alkylamines such as cysteamine, triethylamine, and triptylamine or salts thereof, N, N-dimethylaniline, pyridine, lutidine, collidine, 4_ (dimethylamino) pyridine, imidazole and the like.
- Aromatic amines or salts thereof o-phenylenediamine, tolylene-3,4-diamine, 3,4-diaminobenzoic acid and N-alkyl-substituted products thereof (eg, N-methyl-1,2-phenylenediamine, Diamines such as N-ethyl-1,2-phenylenediamine, N-isopropyl-1,2, phenylenediamine, 2,3-diaminophenol, 4-chloro-1-o—phenylenediamine, etc.
- N-methyl-1,2-phenylenediamine Diamines such as N-ethyl-1,2-phenylenediamine, N-isopropyl-1,2, phenylenediamine, 2,3-diaminophenol, 4-chloro-1-o—phenylenediamine, etc.
- aromatic diamines especially 3,4 diaminobenzoic acid and its N-alkyl Conversion (eg, N-methyl-1,2-phenylenediamine, N-ethyl-1,2-phenylenediamine, N-isopropyl-11,2-phenylenediamine) or a salt thereof;
- Amines such as thiosemicarbazides such as thiosemicarbazide, acetone thiosemicarbazide and phenylthiosemicarbazide, selenosemicarbazides such as selenosemicarbazide and acetone selenosemicarbazide or salts thereof can be used, and among them, amines, especially , Diamines or thiosemicarbazides or salts thereof are preferably used, and 3,4-diaminobenzoic acid or a salt thereof is particularly preferably used.
- Examples of the salt of the base used in the hydrolysis reaction include, for example, those similar to the above-mentioned salts of apelin having a methionine residue which may be oxidized at the N-terminus.
- the amount of the base is usually about 1 to 10,000 mol, preferably about 200 to 300 mol, more preferably about 50 mol per mol of apelin having a diketone form of a methionine residue or a salt thereof. 0 to 300 moles.
- the hydrolysis reaction usually proceeds at about 0 to 70 ° C (preferably about 20 to 40 ° C) for about 1 hour to 7 days (preferably about 10 hours to 5 days). Is preferred.
- a buffer is preferably used as a solvent. Examples of the buffer include a phosphate buffer, an acetate buffer, a citrate buffer, and a formic acid buffer. Buffers and the like can be mentioned. Any buffer may be used as long as it does not inhibit the above-mentioned hydrolysis reaction.
- formic acid such as sodium acetate-sodium formate, sodium formate formate or sodium formate formate buffer is preferable.
- a system buffer is preferably used.
- the pH of the reaction is adjusted to about 2 to 9, especially about 3 to 7, especially about 4 to 6, and the reaction is allowed to proceed.
- These buffers are preferably used at about 0.1 to 8 mol / L, more preferably at about 0.5 to 6 mol / L.
- apelin having a diketone of a methionine residue which may be oxidized at the N-terminus or a salt thereof, and apelin having no methionine residue or a salt thereof which is formed by a hydrolysis reaction and which does not have the methionine residue It is preferable to add urea to the buffer for the hydrolysis reaction for the purpose of preventing precipitation and the like. For example, it is preferable to add urea to the buffer to a concentration of preferably about 1 to 6 M, more preferably about 2 to 5 M.
- the thus obtained apelin or a salt thereof can be isolated and purified from the reaction solution by known purification means, for example, extraction, salting out, partitioning, recrystallization, chromatography, etc.
- purification means for example, extraction, salting out, partitioning, recrystallization, chromatography, etc.
- a purification method by ion exchange chromatography through SP-Sepharose (Pharmacia Biotech Co., Ltd.) or DEAE-5 PW (Tosoichi Co., Ltd.) may be mentioned.
- the obtained apelin can be lyophilized to a powder if necessary.
- stabilizers such as sorbitol, mannitol, dextrose, maltose, trehalose, and glycerol can be added.
- the apelin or a salt thereof produced by the method of the present invention can be mixed with sterilized water, human serum albumin (HSA), physiological saline or other known physiologically acceptable carriers, and can be used in mammals (eg, It can be administered parenterally or topically to humans.
- the daily dose per person is about 0.0 lmg-50 mg, preferably about 0.1 mg-1 Omg, administered parenterally by intravenous injection or intramuscular injection, etc. be able to.
- the preparation containing apelin or a salt thereof produced by the method of the present invention may be a salt, diluted It may also contain other physiologically acceptable active ingredients such as agents, adjuvants, other carriers, buffers, binders, surfactants, and preservatives.
- Preparations for parenteral administration may be sterile aqueous solutions or suspension ampules in physiologically acceptable solvents or sterile powders that can be diluted before use with physiologically acceptable diluents (usually a peptide solution). It is provided as an ampoule (obtained by freeze-drying).
- apelin obtained by the production method of the present invention is involved in central nervous system function control, circulatory function control, immune function control, digestive function control, metabolic function control or genital function control, etc.
- dementia caused by senile dementia, cerebrovascular dementia, and degenerative metamorphic diseases such as Alzheimer's disease, Parkinson's disease, Pick's disease, and Huntington's disease.
- Dementia, endocrine, metabolic, and toxic diseases eg, hypothyroidism, vitamin B12 deficiency, alcohol poisoning, various drugs, poisoning by metals and organic compounds, etc. caused by viral infections.
- sequence numbers in the sequence listing in the present specification indicate the following sequences.
- [SEQ ID NO: 3] b Shows the amino acid sequence of FGF CS23 mutin.
- SEQ ID NO: 7 This shows the base sequence of the primer used in the preparation of a structural gene for apelin-36 in Example 1.
- SEQ ID NO: 8 This shows the base sequence of the primer used in Example 1 for preparing the structural gene for apelin-136.
- SEQ ID NO: 10 This shows the base sequence of the primer used in the preparation of a structural gene for apelin-36 in Example 1.
- SEQ ID NO: 11 This shows the base sequence of the primer used for preparation of the structural gene for apelin-136 in Example 1.
- Example 1 Preparation of human aperin-I 36 structural gene
- the phosphorylated DNA fragment obtained in a) above was combined with 1 g of each of # 1 and ⁇ to make 120 L. After keeping this mixed solution at 80 for 10 minutes, annealing was performed by gradually cooling to room temperature. Ligation reaction was performed using TaKaRa DNA Ligation Kit ver.2 (Takara Shuzo). After 30 L of solution II was added to 30 / L of the annealing solution and mixed well, 60 L of solution I was added, and the mixture was reacted at 37 ° C for 1 hour to perform ligation. After phenol treatment, the aqueous layer was collected, twice the amount of ethanol was added, the mixture was cooled to -70 ° C, and the DNA was precipitated by centrifugation.
- PTB960-2 (EP-A-499990: Koyama et al., Journal of Biotechnology, 32, 273, 1994) digested with Xbal and Aval, and electrophoresed with 1% agarose to about 4.4 Kbp. was extracted using a QIAquick Gel Extraction Kit (Qiagen) and dissolved in 25 L of TE buffer.
- the Xbal and Aval fragments of PTB960-2 and the structural gene of human apelin-36 prepared as described above were subjected to a ligation reaction using TaKaRa DNA Ligation Kit 2 (Takara Shuzo).
- Plasmid PTB960-13 was transformed into Escherichia coli BL21 (DE3) strain (Novagen), seeded on LB agar medium containing 10 ug / mL tetracycline, cultured at 37 ° C for 1 day, and purified with human aperin-36-CS23.
- the fusion protein expression strain BL21 (DE3) / pTB960-13 was obtained (FIG. 4).
- Example 2 Transform the cells obtained in Example 2 into 2 liters using 1 L of LB medium (1% peptone, 0.5% yeast extract, 0.5% sodium chloride) containing 5.mg of OmgZL tetracycline. The cells were shake-cultured at 37 ° C for 8 hours in a flask. The obtained culture solution was used in 19 liters of the main fermentation medium (1.6% sodium hydrogen phosphate, 0.1%). 3% potassium dihydrogen phosphate, 0.1% ammonium chloride, 0.05% sodium chloride, 0.05% magnesium sulfate, 0.02% defoamer, 0.00025% ferrous sulfate, 0.
- Example 2 To 550 g of the cells obtained in Example 2 was added 1500 ml of a solution of 1 OmM EDTA + 1 mM (p-amici'nofxnil) methanesulfonyl fluoride hydrochloride (pH 6.0), followed by ultrasonic treatment (BRA NSON SON After IFI ER MOD EL 450), centrifugation (10000 rpm, 60 min) was performed. The supernatant was pooled, and the same procedure was repeated for the precipitation.
- 1 OmM EDTA + 1 mM (p-amici'nofxnil) methanesulfonyl fluoride hydrochloride pH 6.0
- ultrasonic treatment BRA NSON SON After IFI ER MOD EL 450
- the eluate was concentrated using a Pellicon minicassette (Millipore) while adding 0.1 M acetic acid to obtain a 0.1 M acetic acid solution of human apelin-36-CS23 fusion protein. After urea was added to this solution to a final concentration of 6 M, 35 mg of 1-cyano-4-dimethylaminopyridinium salt (DMAP-CN) was added and reacted at room temperature for 15 minutes.
- DMAP-CN 1-cyano-4-dimethylaminopyridinium salt
- reaction solution was passed through a Sephadex G-25 column (46 mm IDX 600 Margaret L, Pharmacia) equilibrated with 10% acetic acid, and the 10% acetic acid used for equilibration was 6: 111 1111 n
- the S-cyanated human aperin-36-CS23 fusion protein fraction was obtained.
- the eluate was concentrated and desalted with a Pellicon mini force set (Millipore) to obtain a desalted solution of the fusion protein of humanaperin-36-CS23. After adding urea to this desalted solution to a final concentration of 6 M, Further, IN caustic soda was added to a concentration of 0.06 N, and the reaction was performed at 0 ° C for 15 minutes.
- the human caperin-36 fraction was passed through C 4 P-50 (21.5imnIDX300 recital L, Showa Denko) equilibrated with 0.1% trifluoroacetic acid (TFA), and adsorbed and washed. Elution was performed with a step gradient of% B (B: 80% acetonitrile Z 0.1% TFA), and the fraction of humanaperin-36 was pooled, followed by freeze-drying to obtain a freeze-dried powder of humanaperin-136.
- TFA trifluoroacetic acid
- Amino acid composition was determined using an amino acid analyzer (Hitachi L-8500A Amino Acid Analyzer).
- amino acid composition was consistent with the amino acid composition predicted from the DNA sequence of human apelin-36 with methionine added to the N-terminal (Table 1).
- the N-terminal amino acid sequence was determined using a gas phase protein sequencer (Applied Biosystems Model 477A). As a result, the amino acid sequence of the obtained human aperin-136 was identical to the N-terminal amino acid sequence predicted from the DNA nucleotide sequence except that a methionine was added to the N-terminal (Table 2).
- N-terminal amino acid sequence Detected nucleotide sequence of human aperin-36 Predicted from residue No PTH 1) -amino acid
- Example 4 Human apelin-36 obtained in Example 4 was a molecular species in which methionine was added to its N-terminus (Met-human apelin-36).
- Example 5 Bio activity measurement
- Example 6 Removal of N-terminal methionine residue: Part 1
- Amino acid composition was determined using an amino acid analyzer (Hitachi L-8500A Amino Acid Analyzer).
- the N-terminal amino acid sequence was determined using a gas phase protein sequencer (Applied Biosystems Model 477A). The results agreed with the N-terminal amino acid sequence predicted from the obtained DNA sequence of human aperin-136 (Table 5).
- N-terminal amino acid sequence Detected human aperin-1 base sequence ij residue No PTH 1)-predicted from amino acid
- Example 8 Removal of N-terminal methionine residue: Part 2
- Dissolve 364 mg of the met-human caperin obtained in Example 4 in 3M urea After dissolving in 0.8 ml of the solution, a mixed solution of 0.05 ml of 80 mM copper sulfate, 0.46 g of glyoxylic acid, and 0.1 ml of pyridine was added, and the mixture was reacted at 25 for 1 hour. After completion of the reaction, the reaction solution was passed through a Sephadex G-25 column (10 mm IDX 250 mmL) equilibrated with 2.5 M urea + 1 OmM phosphate buffer (pH 5.5) to allow equilibration.
- the solution used was developed at a flow rate of 0.5 m 1 Z, and the human apelin-36 fraction having a diketone form of methionine residue was pooled. Subsequently, equal amounts of 2 M sodium formate, 4 M acetic acid, and 3 M urea solution were added to this fraction, and then 3,4-diaminobenzoic acid was added to a concentration of 4 OmM, followed by a reaction at 30 for 3 days. . After completion of the reaction, the reaction solution was passed through a Sephadex G-25 column (25 mm ID x 600 mmL) equilibrated with 5 OmM phosphate buffer (pH 6.0), and the buffer used for equilibration was added in 4 ml.
- the fraction was developed at a flow rate of 1 min, and 36 fractions of human apelin having no N-terminal methionine residue were pooled.
- N-terminal amino acid sequence is converted to a gas phase protein sequencer (Applied Biosystems) It was determined using the Stems model 477 A). As a result, it was consistent with the N-terminal amino acid sequence predicted from the obtained DNA sequence of human aperin-36 (Table 8).
- N-terminal amino acid sequence Detected '-36 nucleotide sequence Residue No PTH 1)-Predicted from amino acid
- the C-terminal amino acids were analyzed using an amino acid analyzer (Hitachi L-850 A Amino Acid Analyzer) (Table 9).
- Example 8 Using the human apelin obtained in Example 8, the activity was measured by the method (site sensor) described in Example 6 of W99 / 33976, and the activity equivalent to that of the synthetic product of human apelin-36 was measured. It was confirmed that it had. Industrial applicability
- dementia caused by senile dementia cerebrovascular dementia
- systemic degenerative degenerative disease eg, Alzheimer's disease, Parkinson's disease, Pick's disease, Huntington's disease, etc.
- infectivity Dementia endocrine, metabolic, or toxic diseases (eg, hypothyroidism, vitamin B12 deficiency, vitamin B12 deficiency, alcoholism, etc.) caused by diseases (eg, late viral infections such as Creutzfeldt-Jakob disease)
- Dementia caused by drugs, metals, organic compounds, etc.
- dementia caused by neoplastic diseases eg, brain tumors, etc.
- dementia caused by traumatic diseases eg, chronic subdural hematomas, etc.
- Depression hyperactive child (microbrain disorder) syndrome, consciousness disorder, anxiety disorder, schizophrenia, phobia, growth hormone secretion disorder (eg, giantosis, acromegaly, etc.), Eating disease, Bulimia
- AIDS Acquired Immune Deficiency Syndrome: Acquired Immune insufficiency syndrome
- AIDS Acquired Immune insufficiency syndrome
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Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002353560A CA2353560A1 (en) | 1998-12-11 | 1999-12-09 | Process for producing apelin |
EP99961284A EP1138772A4 (en) | 1998-12-11 | 1999-12-09 | PROCESS FOR THE PRODUCTION OF APELINE |
AU17971/00A AU1797100A (en) | 1998-12-11 | 1999-12-09 | Process for producing apelin |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP35238998 | 1998-12-11 | ||
JP10/352389 | 1998-12-11 | ||
JPPCT/JP99/5456 | 1999-10-04 | ||
PCT/JP1999/005456 WO2000020439A1 (fr) | 1998-10-05 | 1999-10-04 | Procede d'elimination de methionine n-terminale |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000036122A1 true WO2000036122A1 (fr) | 2000-06-22 |
Family
ID=18423749
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1999/006903 WO2000036122A1 (fr) | 1998-12-11 | 1999-12-09 | Procede de fabrication de l'apeline |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1138772A4 (ja) |
AU (1) | AU1797100A (ja) |
WO (1) | WO2000036122A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002092829A1 (fr) * | 2001-05-17 | 2002-11-21 | Takeda Chemical Industries, Ltd. | Procede de production d'un peptide |
EP1347053A1 (en) * | 2000-12-07 | 2003-09-24 | Takeda Chemical Industries, Ltd. | Process for producing rfrp |
AU2002227913B2 (en) * | 2000-11-09 | 2007-08-02 | Jorg P. Schur | Synergistic medicament containing aromatic agents and having an antagonistic, regenerative and/or protagonist decontamination effect |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10138569A1 (de) * | 2001-08-06 | 2003-04-30 | Bayer Ag | Regulation des APJ-Rezeptors |
WO2004081198A2 (en) * | 2003-03-12 | 2004-09-23 | Arizona Board Of Regents On Behalf Of The University Of Arizona | Methods for modulating angiogenesis with apelin compositions |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0499990A2 (en) * | 1991-02-19 | 1992-08-26 | Takeda Chemical Industries, Ltd. | Method for producing cysteine-free peptides |
EP0812856A1 (en) * | 1996-06-14 | 1997-12-17 | Takeda Chemical Industries, Ltd. | Method for removing N-terminal methionine |
EP0887417A2 (en) * | 1997-06-27 | 1998-12-30 | Takeda Chemical Industries, Ltd. | Method of producing a 19P2 ligand by cleavage of a fusion protein containing it |
WO1999033976A1 (en) * | 1997-12-24 | 1999-07-08 | Takeda Chemical Industries, Ltd. | Polypeptide, their production and use |
-
1999
- 1999-12-09 AU AU17971/00A patent/AU1797100A/en not_active Abandoned
- 1999-12-09 EP EP99961284A patent/EP1138772A4/en not_active Withdrawn
- 1999-12-09 WO PCT/JP1999/006903 patent/WO2000036122A1/ja not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0499990A2 (en) * | 1991-02-19 | 1992-08-26 | Takeda Chemical Industries, Ltd. | Method for producing cysteine-free peptides |
EP0812856A1 (en) * | 1996-06-14 | 1997-12-17 | Takeda Chemical Industries, Ltd. | Method for removing N-terminal methionine |
EP0887417A2 (en) * | 1997-06-27 | 1998-12-30 | Takeda Chemical Industries, Ltd. | Method of producing a 19P2 ligand by cleavage of a fusion protein containing it |
WO1999033976A1 (en) * | 1997-12-24 | 1999-07-08 | Takeda Chemical Industries, Ltd. | Polypeptide, their production and use |
Non-Patent Citations (2)
Title |
---|
KAZUHIKO TATEMOTO ET AL.: "Isolation and characterization of a novel endogenous peptide ligand for the human APJ receptor", BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS, vol. 251, no. 2, 1998, pages 471 - 476, XP002924361 * |
See also references of EP1138772A4 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU2002227913B2 (en) * | 2000-11-09 | 2007-08-02 | Jorg P. Schur | Synergistic medicament containing aromatic agents and having an antagonistic, regenerative and/or protagonist decontamination effect |
EP1347053A1 (en) * | 2000-12-07 | 2003-09-24 | Takeda Chemical Industries, Ltd. | Process for producing rfrp |
EP1347053A4 (en) * | 2000-12-07 | 2004-11-24 | Takeda Chemical Industries Ltd | METHOD FOR PRODUCING RFRP |
WO2002092829A1 (fr) * | 2001-05-17 | 2002-11-21 | Takeda Chemical Industries, Ltd. | Procede de production d'un peptide |
Also Published As
Publication number | Publication date |
---|---|
AU1797100A (en) | 2000-07-03 |
EP1138772A1 (en) | 2001-10-04 |
EP1138772A4 (en) | 2005-04-06 |
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