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Studies on Phe-228 and Leu-307 recombinant mutants of porcine kidney D-amino acid oxidase: expression, purification, and characterization.

Studies on Phe-228 and Leu-307 recombinant mutants of porcine kidney D-amino acid oxidase: expression, purification, and characterization. Research Abstract Details 

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  • Studies on Phe-228 and Leu-307 recombinant mutants of porcine kidney D-amino acid oxidase: expression, purification, and characterization. Abstract Text:

    m miyanoM Miyano,k fukuiK Fukui,f watanabeF Watanabe,s takahashiS Takahashi,m tadaM Tada,m kanashiroM Kanashiro,y miyakeY Miyake,

    Two recombinant mutants of porcine kidney D-amino acid oxidase [EC 1.4.3.3, DAO], in which Tyr(228) and His(307) are replaced with Phe and Leu, respectively, have been expressed in Escherichia coli and purified to apparent homogeneity. The molecular size and amino-terminal sequence of the two mutants were the same as those of the native DAO. Kinetic analysis revealed that the Michaelis constants of the Phe-228 and Leu-307 mutants for D-alanine were 71- and 10-fold and the inhibition constants for benzoate, a potent competitive inhibitor, were 1,189- and 18-fold greater than those of the native DAO, respectively. The maximum velocities of the Phe-228 and Leu-307 mutants were 66 and 58% that of the native DAO. The kinetically estimated dissociation constant of the Leu-307 mutant for FAD was 28-fold greater than that of the native DAO, whereas the value of the Phe-228 mutant was comparable to that of the native DAO. The Leu-307 mutant and the recombinant wild-type DAO were inactivated by D-propargylglycine (D-PG), a suicide substrate. However, the Phe-228 mutant was resistant to the inactivation. Absorption peaks of the Phe-228 mutant were blue-shifted about 10 nm from the corresponding peaks of the wild-type DAO, and the oxidized form was fully reduced by D-alanine without appearance of the purple intermediate.(ABSTRACT TRUNCATED AT 250 WORDS)

    Studies on Phe-228 and Leu-307 recombinant mutants of porcine kidney D-amino acid oxidase: expression, purification, and characterization. Publishing Authors By Initials

    m miyanoM Miyano,k fukuiK Fukui,f watanabeF Watanabe,s takahashiS Takahashi,m tadaM Tada,m kanashiroM Kanashiro,y miyakeY Miyake,

    For similar animals: chordata: vertebrates: mammals: artiodactyla: swine research abstracts see: animals: chordata: vertebrates: mammals: artiodactyla: swine research

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    Studies on Phe-228 and Leu-307 recombinant mutants of porcine kidney D-amino acid oxidase: expression, purification, and characterization. Journal Published:

    PUBLICATION TYPE: Research Support, Non-U.S. Gov

    Journal: Journal of biochemistry

    VOLUME: 109

    Page Numbers: 171-7

    Journal Abbreviation: J. Biochem.

    ISSN: 0021-924X

    DAY: 19

    MONTH: Jan

    YEAR: 1991

    Studies on Phe-228 and Leu-307 recombinant mutants of porcine kidney D-amino acid oxidase: expression, purification, and characterization. Information

    Number of References:

    LANGUAGE: eng

    NlmUniqueID: 376600

    Studies on Phe-228 and Leu-307 recombinant mutants of porcine kidney D-amino acid oxidase: expression, purification, and characterization. Keywords Mesh Terms:

    KEYWORDS: Swine

    MESH TERMS: metabolism

    Chemical & Substance for Abstract: Studies on Phe-228 and Leu-307 recombinant mutants of porcine kidney D-amino acid oxidase: expression, purification, and characterization. Information

    Substance Name: D-Amino-Acid Oxidase

    Registry Number: EC 1.4.3.3

    Grant and Affiliation Information for Studies on Phe-228 and Leu-307 recombinant mutants of porcine kidney D-amino acid oxidase: expression, purification, and characterization.

    AFFILIATION: Department of Biochemistry, National Cardiovascular Center Research Institute, Osaka.

    Country: JAPAN

    JAPAN Research PublicationJAPAN Research Publication

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    MEDLINETA: J Biochem

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