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Structure, Function, Stability and Knockout Phenotype of Dihydrodipicolinate Synthase from Streptococcus pneumoniaeStructure, Function, Stability and Knockout Phenotype of Dihydrodipicolinate Synthase from Streptococcus pneumoniae
Structural highlights
Function[A5LD17_STREE] Catalyzes the condensation of (S)-aspartate-beta-semialdehyde [(S)-ASA] and pyruvate to 4-hydroxy-tetrahydrodipicolinate (HTPA) (By similarity).[HAMAP-Rule:MF_00418][SAAS:SAAS005263_004_011311] Publication Abstract from PubMedDihydrodipicolinate synthase (DHDPS; EC 4.2.1.52) catalyzes the rate-limiting step in the (S)-lysine biosynthesis pathway of bacteria and plants. Here, the cloning of the DHDPS gene from a clinical isolate of Streptococcus pneumoniae (OXC141 strain) and the strategy used to express, purify and crystallize the recombinant enzyme are described. Diffracting crystals were grown in high-molecular-weight PEG precipitants using the hanging-drop vapour-diffusion method. The best crystal, from which data were collected, diffracted to beyond 2.0 A resolution. Initially, the crystals were thought to belong to space group P4(2)2(1)2, with unit-cell parameters a = 105.5, b = 105.5, c = 62.4 A. However, the R factors remained high following initial processing of the data. It was subsequently shown that the data set was twinned and it was thus reprocessed in space group P2, resulting in a significant reduction in the R factors. Determination of the structure will provide insight into the design of novel antimicrobial agents targeting this important enzyme from S. pneumoniae. Crystallization of dihydrodipicolinate synthase from a clinical isolate of Streptococcus pneumoniae.,Sibarani NE, Gorman MA, Dogovski C, Parker MW, Perugini MA Acta Crystallogr Sect F Struct Biol Cryst Commun. 2010 Jan 1;66(Pt, 1):32-6. Epub 2009 Dec 25. PMID:20057065[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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