3vae | pdb_00003vae

Crystal Structure of M. tuberculosis LD-transpeptidase type 2 with Modified Catalytic Cysteine (C354)

spinqualitylabelsall models 3vae, resolution 2.80Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3vae is a 2 chain structure with sequence from "bacillus_tuberculosis"_(zopf_1883)_klein_1884 "bacillus tuberculosis" (zopf 1883) klein 1884. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: PEG NonStd Res: CSO Gene: lppS, MT2594, Rv2518c ("Bacillus tuberculosis" (Zopf 1883) Klein 1884) Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed With multidrug-resistant cases of tuberculosis increasing globally, better antibiotic drugs and novel drug targets are becoming an urgent need. Traditional beta-lactam antibiotics that inhibit D,D-transpeptidases are not effective against mycobacteria, in part because mycobacteria rely mostly on L,D-transpeptidases for biosynthesis and maintenance of their peptidoglycan layer. This reliance plays a major role in drug resistance and persistence of Mycobacterium tuberculosis (Mtb) infections. The crystal structure at 1.7 A resolution of the Mtb L,D-transpeptidase Ldt(Mt2) containing a bound peptidoglycan fragment, reported here, provides information about catalytic site organization as well as substrate recognition by the enzyme. Based on our structural, kinetic, and calorimetric data, we propose a catalytic mechanism for Ldt(Mt2) in which both acyl-acceptor and acyl-donor substrates reach the catalytic site from the same, rather than different, entrances. Together, this information provides vital insights to facilitate development of drugs targeting this validated yet unexploited enzyme. Targeting the Cell Wall of Mycobacterium tuberculosis: Structure and Mechanism of L,D-Transpeptidase 2.,Erdemli SB, Gupta R, Bishai WR, Lamichhane G, Amzel LM, Bianchet MA Structure. 2012 Dec 5;20(12):2103-15. doi: 10.1016/j.str.2012.09.016. Epub 2012, Oct 25. PMID:23103390 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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