JP5839855B2 - ポリヒドロキシアルカノエートの製造方法 - Google Patents
ポリヒドロキシアルカノエートの製造方法 Download PDFInfo
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- JP5839855B2 JP5839855B2 JP2011144508A JP2011144508A JP5839855B2 JP 5839855 B2 JP5839855 B2 JP 5839855B2 JP 2011144508 A JP2011144508 A JP 2011144508A JP 2011144508 A JP2011144508 A JP 2011144508A JP 5839855 B2 JP5839855 B2 JP 5839855B2
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- 108010010718 poly(3-hydroxyalkanoic acid) synthase Proteins 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- AJPJDKMHJJGVTQ-UHFFFAOYSA-M sodium dihydrogen phosphate Chemical compound [Na+].OP(O)([O-])=O AJPJDKMHJJGVTQ-UHFFFAOYSA-M 0.000 description 1
- 229910001479 sodium magnesium phosphate Inorganic materials 0.000 description 1
- BYKRNSHANADUFY-UHFFFAOYSA-M sodium octanoate Chemical compound [Na+].CCCCCCCC([O-])=O BYKRNSHANADUFY-UHFFFAOYSA-M 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- 235000011008 sodium phosphates Nutrition 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 239000003549 soybean oil Substances 0.000 description 1
- 235000012424 soybean oil Nutrition 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 229960002180 tetracycline Drugs 0.000 description 1
- 229930101283 tetracycline Natural products 0.000 description 1
- 235000019364 tetracycline Nutrition 0.000 description 1
- 150000003522 tetracyclines Chemical class 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical group CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Preparation Of Compounds By Using Micro-Organisms (AREA)
Description
3HH組成上昇率(mol%/g/L)=(3HH(t2)−3HH(t1))/(DCW(t2)−DCW(t1))
3HH(t1):時間t1での3HH組成(mol%)
3HH(t2):時間t2での3HH組成(mol%)
DCW(t1):時間t1での乾燥菌体重量(g/L)
DCW(t2):時間t2での乾燥菌体重量(g/L)
本発明の方法に用いられる窒素源としては、例えばアンモニア、塩化アンモニウム、硫酸アンモニウム、リン酸アンモニウム等のアンモニウム塩である無機窒素源、ペプトン、肉エキス、酵母エキスなどの有機窒素源が挙げられる。リン源としては、例えばリン酸一水素カリウム、リン酸二水素カリウム、リン酸ナトリウム、リン酸一水素ナトリウム、リン酸二水素ナトリウム、リン酸マグネシウム、リン酸などのリン化合物が挙げられる。またその他の無機塩類としては、例えば硫酸マグネシウム、塩化ナトリウムなどを用いることができる。そのほかの有機栄養源としては、グリシン、アラニン、セリン、スレオニン、プロリンなどアミノ酸、ビタミンB1、ビタミンB12、ビタミンC等のビタミン類を用いることができる。しかしながら、生産コスト抑制の観点からは有機栄養源であるペプトン、肉エキス、酵母エキスおよびグリシン、アラニン、セリン、スレオニン、プロリンなどのアミノ酸、ビタミンB1、ビタミンB12、ビタミンC等のビタミンの使用は最少量とすることが好ましい。
国際公開番号WO2009−145164号公報表1記載のPac−bktB/AS+pCUP−631株を用い、次のように培養した。
比基質供給速度=油脂流加速度(g/h)/正味の乾燥菌体重量(g)=単位時間あたりの油脂の供給量(g/h)/(全乾燥菌体重量(g)−ポリエステル含有量(g))
また、リン酸塩水溶液を培養20時間目以降、C/P比が600〜800となるような流速にて連続的に添加した。培養は約64時間行い、培養終了後、遠心分離によって菌体を回収、メタノールで洗浄、凍結乾燥し、乾燥菌体重量を測定した。
リン酸塩水溶液をC/P比が300〜400となるような流速で添加した点を除いて、実施例1と同様の条件で培養を実施した。
リン酸塩水溶液をC/P比が200〜300となるような流速で添加した点を除いて、実施例1と同様の条件で培養を実施した。
リン酸塩水溶液をC/P比が1200〜1600となるような流速で添加した点を除いて、実施例1と同様の条件で培養を実施した。
培養液量5.4L、撹拌速度400rpm、通気量3.6L/min.とした点を除いて、実施例1と同様の条件で培養を実施した。
リン酸塩水溶液をC/P比が100〜200となるような流速で添加した点を除いて、実施例5と同様の条件で培養を実施した。
培養中にリン酸塩水溶液を流加しないという変更点を除いて、実施例1と同様の条件で培養を実施した。
パーム核油オレインのかわりにパームWオレイン油を用いた以外は実施例1と同様の培地・条件で培養を行い、表2に示す結果を得た。
培養中にリン酸塩水溶液を流加しないという変更点を除いて、実施例7と同様の条件で培養を実施した。使用する炭素源が3HH組成に与える影響を表2に示した。
培養に使用する菌株を国際公開公報WO2008/010296号に記載のKNK−005株とした点を除いて、実施例1と同様の条件で培養を行った。表3に結果を記した。
培養中にリン酸塩水溶液を流加しないという変更点を除いて、実施例8と同様の条件で培養を実施した。使用する菌株の違いが3HH組成に与える影響を表3に示した。
Claims (5)
- モノマーユニットとして少なくとも3−ヒドロキシ酪酸と3−ヒドロキシヘキサン酸を含む2種以上の構成要素よりなる共重合ポリエステルを生産するカプリアヴィドゥス(Cupriavidus)属に属する微生物を、天然油脂及び/又は分別油脂を炭素源として含む培地で培養し、かつ培養中に培地にリン化合物を添加することを特徴とするPHAの製造方法であって、前記培地にリン化合物を添加する期間の単位時間当たりに添加する炭素源中の炭素総量(C)の単位時間当たりに添加するリン化合物中のリン総量(P)に対する重量比(C/P比)が600超〜1600であることを特徴とするPHAの製造方法。
- 前記C/P比が600超〜800であることを特徴とする請求項1記載のPHAの製造方法。
- 前記リン化合物が、リン酸及び/又はリン酸塩を含むことを特徴とする請求項1または2記載のPHAの製造方法。
- 前記共重合ポリエステルがP(3HB−co−3HH)である請求項1〜3いずれか一項に記載のPHAの製造方法。
- 前記微生物が、ポリエステル重合酵素遺伝子を組み込んだ形質転換微生物である請求項1〜4いずれか一項に記載のPHAの製造方法。
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