4lq6

Crystal structure of Rv3717 reveals a novel amidase from M. tuberculosis

spinqualitylabelsall models 4lq6, resolution 1.68Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4lq6 is a 1 chain structure with sequence from Mycobacterium tuberculosis. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.68Å Ligands: CL, PT, SO4, ZN Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function O69684_MYCTO Publication Abstract from PubMed Bacterial N-acetylmuramoyl-L-alanine amidases are cell-wall hydrolases that hydrolyze the bond between N-acetylmuramic acid and L-alanine in cell-wall glycopeptides. Rv3717 of Mycobacterium tuberculosis has been identified as a unique autolysin that lacks a cell-wall-binding domain (CBD) and its structure has been determined to 1.7 A resolution by the Pt-SAD phasing method. Rv3717 possesses an alpha/beta-fold and is a zinc-dependent hydrolase. The structure reveals a short flexible hairpin turn that partially occludes the active site and may be involved in autoregulation. This type of autoregulation of activity of PG hydrolases has been observed in Bartonella henselae amidase (AmiB) and may be a general mechanism used by some of the redundant amidases to regulate cell-wall hydrolase activity in bacteria. Rv3717 utilizes its net positive charge for substrate binding and exhibits activity towards a broad spectrum of substrate cell walls. The enzymatic activity of Rv3717 was confirmed by isolation and identification of its enzymatic products by LC/MS. These studies indicate that Rv3717, an N-acetylmuramoyl-L-alanine amidase from M. tuberculosis, represents a new family of lytic amidases that do not have a separate CBD and are regulated conformationally. The structure of Rv3717 reveals a novel amidase from Mycobacterium tuberculosis.,Kumar A, Kumar S, Kumar D, Mishra A, Dewangan RP, Shrivastava P, Ramachandran S, Taneja B Acta Crystallogr D Biol Crystallogr. 2013 Dec;69(Pt 12):2543-54. doi:, 10.1107/S0907444913026371. Epub 2013 Nov 19. PMID:24311595 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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