5.
    发明专利
    未知

    公开(公告)号:DE102004034228A1

    公开(公告)日:2005-07-28

    申请号:DE102004034228

    申请日:2004-07-15

    Abstract: A method for producing a pyrimidine nucleoside compound includes reacting a sugar phosphate and pyrimidine base derivative using an enzyme having cytosine nucleoside phosphorylase activity, the pyrimidine base derivative being represented by general formula (I): (wherein R1 represents an amino group that may be replaced with an acyl group having an alkyl group of 1 to 3 carbon atoms or an alkyl group of 1 to 3 carbon atoms, an alkyl group of 1 to 3 carbon atoms, or a thiol group; R2 represents an amino group, a thiol group, a hydroxyl group, or a hydrogen atom; R3 represents an alkyl group of 1 to 3 carbon atoms that may be replaced with a hydroxyl group, an amino group, or a hydrogen atom; R4 represents a hydroxyl group or a hydrogen atom; when R1 is an amino group, when R2 is a hydroxyl group, and when R4 is a hydrogen atom; R3 is neither an alkyl group of 1 to 3 carbon atoms nor a hydrogen atom).

    6.
    发明专利
    未知

    公开(公告)号:DE69828338D1

    公开(公告)日:2005-02-03

    申请号:DE69828338

    申请日:1998-07-15

    Abstract: Optically active chroman-3-acetic acids and optically active chroman-3-acetic acid esters can be obtained by treating a mixture of (3R)- and (3S)-chroman-3-acetic esters of formula (I) Äwherein R1 is a straight or branched alkyl group having 1-5 carbon atoms and R2 is a hydrogen atom or substituted or unsubstituted amino groupÜ is treated with an esterase which has an optically selective hydrolyzing activity or microorganisms which carry said hydrolase, or a preparation therefrom. A novel esterase derived from bacteria of genus Pseudonocardia can also be used as said esterase.

    NOVEL NITRILE HYDRATASE
    7.
    发明专利

    公开(公告)号:AU2003289338A1

    公开(公告)日:2004-07-14

    申请号:AU2003289338

    申请日:2003-12-15

    Abstract: The present invention is aimed at providing the amino acid sequence of a nitrile hydratase having a novel mutation point, and the base sequence of the gene. It is also aimed at providing a method for modifying an enzyme having a nitrile hydratase activity. As a means to achieve the above objects, the amino acid sequence of a mutant which is obtained by introducing a novel mutation into a Pseudonocardia thermophila JCM3095-derived nitrile hydratase consisting of two types of heterogeneous subunits, and the base sequence of the gene are provided. Further, the nitrile hydratase is modified by specifying the region to be modified in the stereostructure/amino acid sequence of the nitrile hydratase, and applying alteration such as substitution, insertion, deletion or the like, to the amino acids in the amino acid sequence which are corresponding to the amino acid residues forming the region. According to the invention, it is possible to convert a nitrile compound to a corresponding amide compound more efficiently compared with the prior art.

    9.
    发明专利
    未知

    公开(公告)号:DE69828338T2

    公开(公告)日:2005-06-02

    申请号:DE69828338

    申请日:1998-07-15

    Abstract: Optically active chroman-3-acetic acids and optically active chroman-3-acetic acid esters can be obtained by treating a mixture of (3R)- and (3S)-chroman-3-acetic esters of formula (I) Äwherein R1 is a straight or branched alkyl group having 1-5 carbon atoms and R2 is a hydrogen atom or substituted or unsubstituted amino groupÜ is treated with an esterase which has an optically selective hydrolyzing activity or microorganisms which carry said hydrolase, or a preparation therefrom. A novel esterase derived from bacteria of genus Pseudonocardia can also be used as said esterase.

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