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产碱杆菌ECU0401催化拆分扁桃酸及其衍生物 被引量:1

Preparation of (R)-(-)-mandelic acid and its derivatives from racemates by enantioselective degradation with strain Alcaligenes sp. ECU0401
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摘要 从土壤中分离的1株产碱杆菌Alcaligenes sp.ECU0401具有扁桃酸脱氢酶活性,可以以扁桃酸、苯甲酰甲酸或苯甲酸为唯一C源生长,并且具有较高的脱氢酶活力。以外消旋扁桃酸为C源,采用分批补料策略培养(或反应)99h,扁桃酸累计投入量为30.4g/L,(S)-(+)-扁桃酸被完全降解,(R)-(-)-扁桃酸回收产率为32.8%,对映体过量值(e.e.)>99.9%。利用静息细胞作为催化剂不对称降解外消旋扁桃酸的氯代衍生物,制备获得光学活性的(R)-(-)-邻氯扁桃酸、(S)-(+)-间氯扁桃酸和(S)-(+)-对氯扁桃酸,光学纯度均超过99.9%e.e.。 An enantioselective (S) -mandelate-degrading bacterium, Alcaligenes sp. ECU0401, was newly isolated from soil. The supplement of mandelic acid, benzoylformic acid or benzoic acid to the culture medium as a sole carbon source enhanced the degradation activity of the bacterial cells. By fedbatch culture, ( R) -( -) -mandelic acid was prepared in a 5-L fermenter with 32.8% biotransformation for 99 h. (R)-Mandelic acid was recovered in an isolated yield of 32.8% and an enantiomeric excesses ( e. e. ) 〉 99.9% from totally 30.4 g/L of racemic mandelic acid. Using the resting cell Alcaligenes sp. ECU0401 as a biocatalyst, ( R)-(-)-o-chloromandelic acid, ( S)-(+)-m-chloromandelic acid and (S)-(+)-p-chloromandelic acid were prepared with high yields and excellent enantiomeric excesses ( 〉99.9% e. e. ).
出处 《生物加工过程》 CAS CSCD 2009年第4期65-71,共7页 Chinese Journal of Bioprocess Engineering
基金 国家自然科学基金资助项目(20506037&20672037) 华东理工大学生物反应器工程国家重点实验室开放课题资助项目(2008004)
关键词 产碱杆菌 (S)-扁桃酸脱氢酶 对映选择性降解 Alcaligenes sp. (S)-mandelic acid dehydrogenase enantioselective degradation
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