发明名称 |
MUTANTI STABILI DELLA D-N- -CARBAMILASI |
摘要 |
The present invention relates to mutants of D-N- alpha -carbamylase wherein at least one of the cysteines in position 243, 250 and 279 of the amino acid sequence of the wild type enzyme is substituted with a different residue selected from natural amino acids; a recombinant plasmid comprising a nucleotidic sequence which encodes for at least one of the mutants of D-N- alpha -carbamylase, host microorganisms transformed with said plasmid and a process for the preparation of these mutants by the culture of said microorganisms. The mutants of D-N- alpha -carbamylase have a higher enzymatic stability than that of the wild type enzyme and are particularly useful in the preparation of D- alpha -amino acids providing an improvement in the production yields. <IMAGE> |
申请公布号 |
IT1269321(B) |
申请公布日期 |
1997.03.26 |
申请号 |
IT1994MI00725 |
申请日期 |
1994.04.15 |
申请人 |
ENIRICERCHE SPA |
发明人 |
GALLI GIULIANO;GRIFANTINI RENATA;GRANDI GUIDO |
分类号 |
C12N15/09;C07H21/04;C07K14/195;C07K14/41;C12N1/21;C12N9/14;C12N9/80;C12N15/00;C12N15/55;C12P13/04;C12R1/01;C12R1/19 |
主分类号 |
C12N15/09 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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