3ic1 | pdb_00003ic1

Crystal structure of zinc-bound succinyl-diaminopimelate desuccinylase from Haemophilus influenzae

spinqualitylabelsall models 3ic1, resolution 2.30Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3ic1 is a 2 chain structure with sequence from Haemophilus influenzae. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: GOL, SO4, ZN Gene: dapE, HI0102 (Haemophilus influenzae) Activity: Succinyl-diaminopimelate desuccinylase, with EC number 3.5.1.18 Resources: FirstGlance, OCA, RCSB, PDBsum 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 Biosynthesis of lysine and meso-diaminopimelic acid in bacteria provides essential components for protein synthesis and construction of the bacterial peptidoglycan cell wall. The dapE operon enzymes synthesize both meso-diaminopimelic acid and lysine and, therefore, represent potential targets for novel antibacterials. The dapE-encoded N-succinyl-L,L-diaminopimelic acid desuccinylase functions in a late step of the pathway and converts N-succinyl-L,L-diaminopimelic acid to L,L-diaminopimelic acid and succinate. Deletion of the dapE gene is lethal to Helicobacter pylori and Mycobacterium smegmatis, indicating that DapE's are essential for cell growth and proliferation. Since there are no similar pathways in humans, inhibitors that target DapE may have selective toxicity against only bacteria. A major limitation in developing antimicrobial agents that target DapE has been the lack of structural information. Herein, we report the high-resolution X-ray crystal structures of the DapE from Haemophilus influenzae with one and two zinc ions bound in the active site, respectively. These two forms show different activity. Based on these newly determined structures, we propose a revised catalytic mechanism of peptide bond cleavage by DapE enzymes. These structures provide important insight into catalytic mechanism of DapE enzymes as well as a structural foundation that is critical for the rational design of DapE inhibitors. Structural basis for catalysis by the mono- and dimetalated forms of the dapE-encoded N-succinyl-L,L-diaminopimelic acid desuccinylase.,Nocek BP, Gillner DM, Fan Y, Holz RC, Joachimiak A J Mol Biol. 2010 Apr 2;397(3):617-26. Epub 2010 Feb 4. PMID:20138056 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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