The invention relates to novel 7β-hydroxysteroid dehydrogenases which are obtainable from bacteria of the genus
Collinsella
, especially of the strain
Collinsella aerofaciens
, to the sequences encoding said enzymes, to methods for producing said enzymes and to their use in the enzymatic conversion of cholic acid compounds, and especially in the production of ursodeoxycholic acid (UDCS). The invention also relates to novel methods for the synthesis UDCS.
本发明涉及从Collinsella属的细菌中获得的新型7β-羟基类
固醇脱氢酶,特别是从Collinsella aerofaciens菌株中获得的酶,以及编码该酶的序列,制备该酶的方法以及在
胆酸化合物的酶转化中以及特别是在制备
熊去氧胆酸(UDCS)中使用该酶。本发明还涉及UDCS的合成新方法。