4m19

dihydrodipicolinate synthase from C. jejuni with pyruvate bound to the active site and Lysine bound to allosteric site

spinqualitylabelsall models 4m19, resolution 2.00Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4m19 is a 4 chain structure with sequence from Camje. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: EDO, LYS, PEG, PG4 NonStd Res: KPI Related: 4ly8 Gene: Cj0806, dapA (CAMJE) 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 found in most bacteria and plants, controls a critical step in the biosynthesis of l-lysine and meso-diaminopimelate, necessary components for bacterial cell wall biosynthesis. DHDPS catalyzes the condensation of pyruvate and (S)-aspartate-beta-semialdehyde, forming an unstable product that is dehydrated to dihydrodipicolinate. The tetrameric enzyme is allosterically inhibited by l-lysine, and a better understanding of the allosteric inhibition mechanism is necessary for the design of potent antibacterial therapeutics. Here we describe the high-resolution crystal structures of DHDPS from Campylobacter jejuni with and without its inhibitor bound to the allosteric sites. These structures reveal a role for Y110 in the regulation of the allosteric inhibition by lysine. Mutation of Y110 to phenylalanine results in insensitivity to lysine inhibition, although the mutant crystal structure reveals that lysine does bind in the allosteric site. Comparison of the lysine-bound Y110F structure with wild-type structures reveals that key structural changes due to lysine binding are absent in this mutant. Tyrosine 110 plays a critical role in regulating the allosteric inhibition of Campylobacter jejuni dihydrodipicolinate synthase by lysine.,Conly CJ, Skovpen YV, Li S, Palmer DR, Sanders DA Biochemistry. 2014 Dec 2;53(47):7396-406. doi: 10.1021/bi5012157. Epub 2014 Nov, 18. PMID:25369463 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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