3c3y

Crystal Structure of PFOMT, Phenylpropanoid and Flavonoid O-methyltransferase from M. crystallinum

spinqualitylabelsall models 3c3y, resolution 1.37Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3c3y is a 2 chain structure with sequence from Mesembryanthemum crystallinum. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.371Å Ligands: CA, SAH Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q6YI95_MESCR 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 Plant S-adenosyl-l-methionine-dependent class I natural product O-methyltransferases (OMTs), related to animal catechol OMTs, are dependent on bivalent cations and strictly specific for the meta position of aromatic vicinal dihydroxy groups. While the primary activity of these class I enzymes is methylation of caffeoyl coenzyme A OMTs, a distinct subset is able to methylate a wider range of substrates, characterized by the promiscuous phenylpropanoid and flavonoid OMT. The observed broad substrate specificity resides in two regions: the N-terminus and a variable insertion loop near the C-terminus, which displays the lowest degree of sequence conservation between the two subfamilies. Structural and biochemical data, based on site-directed mutagenesis and domain exchange between the two enzyme types, present evidence that only small topological changes among otherwise highly conserved 3-D structures are sufficient to differentiate between an enzymatic generalist and an enzymatic specialist in plant natural product methylation. Biochemical and structural analysis of substrate promiscuity in plant Mg2+-dependent O-methyltransferases.,Kopycki JG, Rauh D, Chumanevich AA, Neumann P, Vogt T, Stubbs MT J Mol Biol. 2008 Apr 18;378(1):154-64. Epub 2008 Feb 20. PMID:18342334 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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