4bf5

Structure of broad spectrum racemase from Aeromonas hydrophila

spinqualitylabelsall models 4bf5, resolution 1.45Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4bf5 is a 2 chain structure with sequence from Aeromonas hydrophila subsp. hydrophila. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.45Å Ligands: CL, GOL, NI, PLP Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function BSR_AERHH Amino-acid racemase able to utilize a broad range of substrates. Reversibly racemizes ten of the 19 natural chiral amino acids known, including both non-beta-branched aliphatic amino acids (Ala, Leu, Met, Ser, Cys, Gln and Asn) and positively charged amino acids (His, Lys and Arg). Is not active on negatively charged (Glu and Asp) or aromatic (Tyr, Trp and Phe) amino acids and displays minimal activity towards beta-branched aliphatic (Ile, Val and Thr) substrates (PubMed:24419381). Enables bacteria to produce and release extracellular non-canonical D-amino acids (NCDAAs) that regulate diverse cellular processes (By similarity).[UniProtKB:Q9KSE5] Publication Abstract from PubMed Broad-spectrum amino-acid racemases (Bsrs) enable bacteria to generate noncanonical D-amino acids, the roles of which in microbial physiology, including the modulation of cell-wall structure and the dissolution of biofilms, are just beginning to be appreciated. Here, extensive crystallographic, mutational, biochemical and bioinformatic studies were used to define the molecular features of the racemase BsrV that enable this enzyme to accommodate more diverse substrates than the related PLP-dependent alanine racemases. Conserved residues were identified that distinguish BsrV and a newly defined family of broad-spectrum racemases from alanine racemases, and these residues were found to be key mediators of the multispecificity of BrsV. Finally, the structural analysis of an additional Bsr that was identified in the bioinformatic analysis confirmed that the distinguishing features of BrsV are conserved among Bsr family members. Structural basis for the broad specificity of a new family of amino-acid racemases.,Espaillat A, Carrasco-Lopez C, Bernardo-Garcia N, Pietrosemoli N, Otero LH, Alvarez L, de Pedro MA, Pazos F, Davis BM, Waldor MK, Hermoso JA, Cava F Acta Crystallogr D Biol Crystallogr. 2014 Jan;70(Pt 1):79-90. doi:, 10.1107/S1399004713024838. Epub 2013 Dec 24. PMID:24419381 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Alanine racemase 3D structures

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