5f1v

biomimetic design results in a potent allosteric inhibitor of dihydrodipicolinate synthase from Campylobacter jejuni

spinqualitylabelsall models 5f1v, resolution 2.20Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5f1v is a 4 chain structure with sequence from "campylobacter_fetus_subsp._jejuni"_smibert_1974 "campylobacter fetus subsp. jejuni" smibert 1974. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: 3VN, EDO, GOL, PGE NonStd Res: KPI Related: 5f1u Gene: dapA ("Campylobacter fetus subsp. jejuni" Smibert 1974) Activity: 4-hydroxy-tetrahydrodipicolinate synthase, with EC number 4.3.3.7 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [DAPA_CAMJE] Catalyzes the condensation of (S)-aspartate-beta-semialdehyde [(S)-ASA] and pyruvate to 4-hydroxy-tetrahydrodipicolinate (HTPA).[HAMAP-Rule:MF_00418] Publication Abstract from PubMed Dihydrodipicolinate synthase (DHDPS), an enzyme required for bacterial peptidoglycan biosynthesis, catalyzes the condensation of pyruvate and beta-aspartate semialdehyde (ASA) to form a cyclic product which dehydrates to form dihydrodipicolinate. DHDPS has, for several years, been considered a putative target for novel antibiotics. We have designed the first potent inhibitor of this enzyme by mimicking its natural allosteric regulation by lysine, and obtained a crystal structure of the protein-inhibitor complex at 2.2 A resolution. This novel inhibitor, which we named "bislysine", resembles two lysine molecules linked by an ethylene bridge between the alpha-carbon atoms. Bislysine is a mixed partial inhibitor with respect to the first substrate, pyruvate, and a noncompetitive partial inhibitor with respect to ASA, and binds to all forms of the enzyme with a Ki near 200 nM, more than 300 times more tightly than lysine. Hill plots show that the inhibition is cooperative, indicating that the allosteric sites are not independent despite being located on opposite sides of the protein tetramer, separated by approximately 50 A. A mutant enzyme resistant to lysine inhibition, Y110F, is strongly inhibited by this novel inhibitor, suggesting this may be a promising strategy for antibiotic development. Biomimetic Design Results in a Potent Allosteric Inhibitor of Dihydrodipicolinate Synthase from Campylobacter jejuni.,Skovpen YV, Conly CJ, Sanders DA, Palmer DR J Am Chem Soc. 2016 Feb 17;138(6):2014-20. doi: 10.1021/jacs.5b12695. Epub 2016, Feb 2. PMID:26836694 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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