2vjy

Pyruvate decarboxylase from Kluyveromyces lactis in complex with the substrate analogue methyl acetylphosphonate

spinqualitylabelsall models 2vjy, resolution 2.30Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2vjy is a 4 chain structure with sequence from Kluyveromyces lactis. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: ALK, ALU, MG, TPP Related: 2vk4, 2g1i Activity: Pyruvate decarboxylase, with EC number 4.1.1.1 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 The mechanism by which the enzyme pyruvate decarboxylase from two yeast species is activated allosterically has been elucidated. A total of seven three-dimensional structures of the enzyme, of enzyme variants, or of enzyme complexes from two yeast species, three of them reported here for the first time, provide detailed atomic resolution snapshots along the activation coordinate. The prime event is the covalent binding of the substrate pyruvate to the side chain of cysteine 221, thus forming a thiohemiketal. This reaction causes the shift of a neighboring amino acid, which eventually leads to the rigidification of two otherwise flexible loops, one of which provides two histidine residues necessary to complete the enzymatically competent active site architecture. The structural data are complemented and supported by kinetic investigations and binding studies, providing a consistent picture of the structural changes occurring upon enzyme activation. Covalently bound substrate at the regulatory site of yeast pyruvate decarboxylases triggers allosteric enzyme activation.,Kutter S, Weiss MS, Wille G, Golbik R, Spinka M, Konig S J Biol Chem. 2009 May 1;284(18):12136-44. Epub 2009 Feb 26. PMID:19246454 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Pyruvate decarboxylase

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