The present invention relates to a hydantoinase having an amino acid sequence selected from (i) or (ii), with (i) amino acid sequence selected from SEQ ID NO: 6-20 and SEQ ID NO: 73-119 (ii) amino acid sequence wherein in the amino acid sequence of SEQ ID NO: 6-20 and SEQ ID NO: 73-119, 1 to 75 amino acid residues have been substituted, deleted, inserted and/or added, and wherein further the catalytic activity of the hydantoinase is higher by a factor of at least 1.2 than the catalytic activity of the hydantoinase having amino acid sequence SEQ ID NO: 1. The present invention further relates to a process for preparing amino acids, wherein said hydantoinase is used.
本发明涉及一种具有选自(i)或(ii)的
氨基酸序列的 hydantoina
SE,其(i)
氨基酸序列选自
SEQ ID NO: 6-20 和
SEQ ID NO: 73-119 (ii)
氨基酸序列,其中在
SEQ ID NO: 6-20 和
SEQ ID NO: 73-119 的
氨基酸序列中,1 至 75 个
氨基酸残基被取代、删除、插入和/或添加,并且该 hydantoina
SE 的催化活性比具有
SEQ ID NO: 1.2 倍,高于具有
SEQ ID NO: 1
氨基酸序列的 hydantoina
SE 的催化活性。本发明进一步涉及一种制备
氨基酸的工艺,其中使用了所述的
水泛素酶。