2x65 | pdb_00002x65

Crystal structure of T. maritima GDP-mannose pyrophosphorylase in complex with mannose-1-phosphate.

spinqualitylabelsall models 2x65, resolution 2.10Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2x65 is a 2 chain structure with sequence from Thema. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: M1P, MG, MPD, MRD, PO4 Related: 2x5z, 2x5s, 2x60 Activity: Mannose-1-phosphate guanylyltransferase, with EC number 2.7.7.13 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 GMP catalyzes the formation of GDP-Man, a fundamental precursor for protein glycosylation and bacterial cell wall and capsular polysaccharide biosynthesis. Crystal structures of GMP from the thermophilic bacterium Thermotoga maritima in the apo form, in complex with the substrates mannose-1-phosphate or GTP and bound with the end product GDP-Man in the presence of the essential divalent cation Mg(2+), were solved in the 2.1-2.8 A resolution range. The T. maritima GMP molecule is organized in two separate domains: a N-terminal Rossman fold-like domain and a C-terminal left-handed beta-helix domain. Two molecules associate into a dimer through a tail-to-tail arrangement of the C-terminal domains. Comparative analysis of the structures along with characterization of enzymatic parameters reveals the bases of substrate specificity of this class of sugar nucleotidyltransferases. In particular, substrate and product binding are associated with significant changes in the conformation of loop regions lining the active center and in the relative orientation of the two domains. Involvement of both the N- and C-terminal domains, coupled to the catalytic role of a bivalent metal ion, highlights the catalytic features of bacterial GMPs compared with other members of the pyrophosphorylase superfamily. Structural insights into the catalytic mechanism of bacterial guanosine-diphospho-D-mannose pyrophosphorylase and its regulation by divalent ions.,Pelissier MC, Lesley SA, Kuhn P, Bourne Y J Biol Chem. 2010 Aug 27;285(35):27468-76. Epub 2010 Jun 23. PMID:20573954 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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