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    Acta Crystallogr Sect F Struct Biol Cryst Commun. 2008 Sep 1;64(Pt 9):785-7. Epub 2008 Aug 9.

    Expression, purification, crystallization and preliminary X-ray studies of histamine dehydrogenase from Nocardioides simplex.

    Source

    Department of Chemistry, The University of Kansas, 1251 Wescoe Hall Drive, Lawrence, KS 66045, USA.

    Abstract

    Histamine dehydrogenase (HADH) from Nocardioides simplex catalyzes the oxidative deamination of histamine to produce imidazole acetaldehyde and an ammonium ion. HADH is functionally related to trimethylamine dehydrogenase (TMADH), but HADH has strict substrate specificity towards histamine. HADH is a homodimer, with each 76 kDa subunit containing two redox cofactors: a [4Fe-4S] cluster and an unusual covalently bound flavin mononucleotide, 6-S-cysteinyl-FMN. In order to understand the substrate specificity of HADH, it was sought to determine its structure by X-ray crystallography. This enzyme has been expressed recombinantly in Escherichia coli and successfully crystallized in two forms. Diffraction data were collected to 2.7 A resolution at the SSRL synchrotron with 99.7% completeness. The crystals belonged to the orthorhombic space group P2(1)2(1)2(1), with unit-cell parameters a = 101.14, b = 107.03, c = 153.35 A.

    PMID:
    18765904
    [PubMed - indexed for MEDLINE]
    PMCID: PMC2531280
    Free PMC Article

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