JP2015181358A - 5−アミノレブリン酸又はその塩の製造方法 - Google Patents
5−アミノレブリン酸又はその塩の製造方法 Download PDFInfo
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- JP2015181358A JP2015181358A JP2014058254A JP2014058254A JP2015181358A JP 2015181358 A JP2015181358 A JP 2015181358A JP 2014058254 A JP2014058254 A JP 2014058254A JP 2014058254 A JP2014058254 A JP 2014058254A JP 2015181358 A JP2015181358 A JP 2015181358A
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- aminolevulinic acid
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- salt
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Landscapes
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Abstract
Description
従って、本発明の課題は、微生物を用いるさらに新たな5−アミノレブリン酸の製造法を提供することにある。
そこで、本発明者は、5−アミノレブリン酸生産微生物の培養条件について種々研究を重ねた結果、培養の途中に培養液を一部抜き出し、一定量の酵母エキスを含有する新鮮な培地を投入、培養を継続させる半連続培養法を適用することにより、これまでの回分培養法を用いた製造方法よりも、単位時間あたりの高い収量で5−アミノレブリン酸を得ることができることを見出し、本発明を完成するに至った。
〔1〕5−アミノレブリン酸生産微生物による5−アミノレブリン酸またはその塩の製造方法において、培養途中に、培養液を抜き出し、培地の酵母エキス量が1g/L以上の新鮮な培地を投入する操作を1回以上行うことを特徴とする5−アミノレブリン酸またはその塩の製造方法。
〔2〕培地の抜き出し量が、培地の抜き出し時の発酵槽内培養液量の10%〜90%、新鮮な培地の投入量が抜き出した培養液量の0.8〜4倍容量である〔1〕に記載の5−アミノレブリン酸またはその塩の製造方法。
〔3〕培地の抜き出し及び新鮮な培地の投入時期が、培養開始後88時間以内である〔1〕又は〔2〕記載の5−アミノレブリン酸またはその塩の製造方法。
〔4〕5−アミノレブリン酸生産微生物が、ロドバクター(Rhodobacter)属の微生物である〔1〕〜〔3〕のいずれかに記載の5−アミノレブリン酸またはその塩の製造方法。
〔5〕5−アミノレブリン酸生産微生物が、ロドバクター・スフェロイデス(Rhodobacter sphaeroides)又はその変異株である〔1〕〜〔4〕のいずれかに記載の5−アミノレブリン酸またはその塩の製造方法。
培地1(組成は表1に示す)200mLを2L容三角フラスコに分注し、121℃で20分間滅菌した後、放冷した。これにロドバクター・スフェロイデスCR−0072009(FERM BP−6320)を植菌後、32℃、暗所にて26時間振盪培養した。
3L容の培養槽に1.8Lの培地2(組成は表1に示す)を調製したところへ、製造例1で得られた前培養物を、初期菌体濃度(OD660nm)が0.4となるように植菌し、28℃、通気量1.8L/分、溶存酸素濃度(DO)の下限値を5%として撹拌培養した。培養開始から25時間後に、最終濃度がグリシン65mM、レブリン酸5mMとなるようにこれらの水溶液を添加し、撹拌回転数を420rpmにして、硫酸を用いてpHを6.4〜6.5に保ちながら培養を続けた。グリシンは、始めのグリシン添加後から16時間後、その後は12時間毎にそれぞれ65mMとなるように添加し、培養開始から100時間後に培養を終了した。この培養にて得られた5−アミノレブリン酸量(5−アミノレブリン酸塩酸塩換算)を表3に示す。
3L容の培養槽に1.8Lの培地2を調製したところへ、製造例1で得られた培養物を、初期菌体濃度(OD660nm)が0.4となるように植菌し、28℃、通気量1.8L/分、溶存酸素濃度(DO)の下限値を5%として撹拌培養した。培養開始から25時間後に、最終濃度がグリシン65mM、レブリン酸5mMになるようにこれらの水溶液を添加し、撹拌回転数を420rpmにして、硫酸を用いてpHを6.4〜6.5に保ちながら培養を続けた。グリシンは、始めのグリシン添加後から16時間後、その後は12時間毎にそれぞれ最終濃度が65mMとなるように水溶液を添加し、3回目のグリシン添加から12時間後に、40%(0.8L)の培養液を抜き出した。その後、抜き出した量と同量(0.8L)の培地3(組成は表2に示す)を投入後、4回目のグリシン添加を実施した。その後も12時間毎にグリシンを添加し、培養開始から100時間後に培養を終了させた。この培養にて得られた5−アミノレブリン酸量(5−アミノレブリン酸塩酸塩換算)を表3に示す。
はじめに準備した培地に培地2を用い、培養液抜き出し後に添加する培地に培地4(組成は表2に示す)を用いた以外は実施例1と同様な方法で実施した。培養開始から100時間後に培養を終了させた際に得られた5−アミノレブリン酸量(5−アミノレブリン酸塩酸塩換算)を表3に示す。
はじめに準備した培地に培地5(組成は表2に示す)を用い、培養液抜き出し後に添加する培地に培地6を用いた以外は実施例1と同様な方法で実施した。培養開始から100時間後に培養を終了させた際に得られた5−アミノレブリン酸量(5−アミノレブリン酸塩酸塩換算)を表3に示す。
Claims (5)
- 5−アミノレブリン酸生産微生物による5−アミノレブリン酸またはその塩の製造方法において、培養途中に、培養液を抜き出し、培地の酵母エキス量が1g/L以上の新鮮な培地を投入する操作を1回以上行うことを特徴とする5−アミノレブリン酸またはその塩の製造方法。
- 培地の抜き出し量が培地の抜き出し時の発酵槽内培養液量の10%〜90%であり、新鮮な培地の投入量が抜き出した培養液量の0.8〜4倍容量である請求項1記載の5−アミノレブリン酸またはその塩の製造方法。
- 培地の抜き出し及び新鮮な培地の投入時期が、培養開始後88時間以内である請求項1又は2記載の5−アミノレブリン酸またはその塩の製造方法。
- 5−アミノレブリン酸生産微生物が、ロドバクター(Rhodobacter)属の微生物である請求項1〜3のいずれかに記載の5−アミノレブリン酸またはその塩の製造方法。
- 5−アミノレブリン酸生産微生物が、ロドバクター・スフェロイデス(Rhodobacter sphaeroides)又はその変異株である請求項1〜4のいずれかに記載の5−アミノレブリン酸またはその塩の製造方法。
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JPS6255094A (ja) * | 1985-09-03 | 1987-03-10 | Shoichi Shimizu | ポリ−β−ヒドロキシ酪酸の製造方法 |
JPH02234689A (ja) * | 1989-03-09 | 1990-09-17 | Denki Kagaku Kogyo Kk | ヒアルロン酸の製造方法 |
JPH10286083A (ja) * | 1997-04-16 | 1998-10-27 | Nakano Vinegar Co Ltd | グルコン酸および酢酸含有発酵液の製造方法 |
JPH1142083A (ja) * | 1997-05-27 | 1999-02-16 | Cosmo Sogo Kenkyusho:Kk | 5−アミノレブリン酸生産微生物及びこれを用いた5−アミノレブリン酸の製造法 |
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JPS6255094A (ja) * | 1985-09-03 | 1987-03-10 | Shoichi Shimizu | ポリ−β−ヒドロキシ酪酸の製造方法 |
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