5ocw | pdb_00005ocw

Structure of Mycobacterium tuberculosis tryptophan synthase in space group F222

spinqualitylabelsall models 5ocw, resolution 4.00Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5ocw is a 24 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: P1T Activity: Tryptophan synthase, with EC number 4.2.1.20 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [TRPA_MYCTU] The alpha subunit is responsible for the aldol cleavage of indoleglycerol phosphate to indole and glyceraldehyde 3-phosphate. [TRPB_MYCTU] The beta subunit is responsible for the synthesis of L-tryptophan from indole and L-serine (By similarity). Publication Abstract from PubMed Drug discovery efforts against the pathogen Mycobacterium tuberculosis (Mtb) have been advanced through phenotypic screens of extensive compound libraries. Such a screen revealed sulfolane 1 and indoline-5-sulfonamides 2 and 3 as potent inhibitors of mycobacterial growth. Optimization in the sulfolane series led to compound 4, which has proven activity in an in vivo murine model of Mtb infection. Here we identify the target and mode of inhibition of these compounds based on whole genome sequencing of spontaneous resistant mutants, which identified mutations locating to the essential alpha- and beta-subunits of tryptophan synthase. Over-expression studies confirmed tryptophan synthase as the biological target. Biochemical techniques probed the mechanism of inhibition, revealing the mutant enzyme complex incurs a fitness cost but does not prevent inhibitor binding. Mapping of the resistance conferring mutations onto a low-resolution crystal structure of Mtb tryptophan synthase showed they locate to the interface between the alpha- and beta-subunits. The discovery of anti-tubercular agents inhibiting tryptophan synthase highlights the therapeutic potential of this enzyme and draws attention to the prospect of other amino acid biosynthetic pathways as future Mtb drug targets. Inhibiting mycobacterial tryptophan synthase by targeting the inter-subunit interface.,Abrahams KA, Cox JAG, Futterer K, Rullas J, Ortega-Muro F, Loman NJ, Moynihan PJ, Perez-Herran E, Jimenez E, Esquivias J, Barros D, Ballell L, Alemparte C, Besra GS Sci Rep. 2017 Aug 25;7(1):9430. doi: 10.1038/s41598-017-09642-y. PMID:28842600 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

Proteopedia Page Contributors and Editors (what is this?)

OCA