2w2a

Crystal Structure of p-coumaric Acid Decarboxylase from Lactobacillus plantarum: structural insights into the active site and decarboxylation catalytic mechanism

spinqualitylabelsall models 2w2a, resolution 1.38Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2w2a is a 2 chain structure with sequence from "lactobacillus_arabinosus"_fred_et_al. "lactobacillus arabinosus" fred et al.. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Related: 2w2b, 2w2f, 2gc9, 2wsj Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed p-Coumaric acid decarboxylases (PDCs) catalyze the nonoxidative decarboxylation of hydroxycinnamic acids to generate the corresponding vinyl derivatives. Despite the biotechnological relevance of PDCs in food industry, their catalytic mechanism remains largely unknown. Here, we report insights into the structural basis of catalysis for the homodimeric PDC from Lactobacillus plantarum (LpPDC). The global fold of LpPDC is based on a flattened beta-barrel surrounding an internal cavity. Crystallographic and functional analyses of single-point mutants of residues located within this cavity have permitted identifying a potential substrate-binding pocket and also to provide structural evidences for rearrangements of surface loops so that they can modulate the accessibility to the active site. Finally, combination of the structural and functional data with in silico results enables us to propose a two-step catalytic mechanism for decarboxylation of p-coumaric acid by PDCs where Glu71 is involved in proton transfer, and Tyr18 and Tyr20 are involved in the proper substrate orientation and in the release of the CO(2) product. Proteins 2010. (c) 2010 Wiley-Liss, Inc. p-Coumaric acid decarboxylase from Lactobacillus plantarum: Structural insights into the active site and decarboxylation catalytic mechanism.,Rodriguez H, Angulo I, de Las Rivas B, Campillo N, Paez JA, Munoz R, Mancheno JM Proteins. 2009 Dec 21. PMID:20112419 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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