3l1v

Crystal structure of GmhB from E. coli in complex with calcium and phosphate.

spinqualitylabelsall models 3l1v, resolution 1.95Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3l1v is a 2 chain structure with sequence from Escherichia coli. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CA, PO4, ZN Related: 3l1u Gene: b0200, gmhB, JW0196, yaeD (Escherichia coli) Resources: FirstGlance, OCA, RCSB, PDBsum Function [GMHB_ECOLI] Converts the D-glycero-beta-D-manno-heptose 1,7-bisphosphate intermediate into D-glycero-beta-D-manno-heptose 1-phosphate (HBP) by removing the phosphate group at the C-7 position. Also catalyzes the dephosphorylation of fructose-1,6-bisphosphate (Fru1,6bisP). 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 Lipopolysaccharide is a major component of the outer membrane of gram-negative bacteria and provides a permeability barrier to many commonly used antibiotics. ADP-heptose residues are an integral part of the LPS inner core, and mutants deficient in heptose biosynthesis demonstrate increased membrane permeability. The heptose biosynthesis pathway involves phosphorylation and dephosphorylation steps not found in other pathways for the synthesis of nucleotide sugar precursors. Consequently, the heptose biosynthetic pathway has been marked as a novel target for antibiotic adjuvants, which are compounds that facilitate and potentiate antibiotic activity. D-alpha,beta-D-heptose-1,7-bisphosphate phosphatase (GmhB) catalyzes the third essential step of LPS heptose biosynthesis. This study describes the first crystal structure of GmhB and enzymatic analysis of the protein. Structure-guided mutations followed by steady state kinetic analysis, together with established precedent for HAD phosphatases, suggest that GmhB functions through a phosphoaspartate intermediate. This study provides insight into the structure-function relationship of GmhB, a new target for combatting gram-negative bacterial infection. Structural and kinetic characterization of the LPS biosynthetic enzyme D-alpha,beta-D-heptose-1,7-bisphosphate phosphatase (GmhB) from Escherichia coli.,Taylor PL, Sugiman-Marangos S, Zhang K, Valvano MA, Wright GD, Junop MS Biochemistry. 2010 Feb 9;49(5):1033-41. PMID:20050699 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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