4ogd

Crystal structure of succinic semialdehyde dehydrogenase from Streptococcus pyogenes in complex with NADP+ as the cofactor

spinqualitylabelsall models 4ogd, resolution 1.60Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4ogd is a 2 chain structure with sequence from Streptococcus pyogenes MGAS1882. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.6Å Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function A0A0J9X1M8_STRPY Publication Abstract from PubMed The gamma-Aminobutyric acid (GABA) that is found in prokaryotic and eukaryotic organisms has been used in various ways as a signaling molecule or a significant component generating metabolic energy under conditions of nutrient limitation or stress, through GABA catabolism. Succinic semialdehyde dehydrogenase (SSADH) catalyzes the oxidation of succinic semialdehyde to succinic acid in the final step of GABA catabolism. Here, we report the catalytic properties and two crystal structures of SSADH from Streptococcus pyogenes (SpSSADH) regarding its cofactor preference. Kinetic analysis showed that SpSSADH prefers NADP(+) over NAD(+) as a hydride acceptor. Moreover, the structures of SpSSADH were determined in an apo-form and in a binary complex with NADP(+) at 1.6 A and 2.1 A resolutions, respectively. Both structures of SpSSADH showed dimeric conformation, containing a single cysteine residue in the catalytic loop of each subunit. Further structural analysis and sequence comparison of SpSSADH with other SSADHs revealed that Ser158 and Tyr188 in SpSSADH participate in the stabilization of the 2'-phosphate group of adenine-side ribose in NADP(+). Our results provide structural insights into the cofactor preference of SpSSADH as the gram-positive bacterial SSADH. Kinetic and Structural Characterization for Cofactor Preference of Succinic Semialdehyde Dehydrogenase from Streptococcus pyogenes.,Jang EH, Park SA, Chi YM, Lee KS Mol Cells. 2014 Oct 31;37(10):719-26. doi: 10.14348/molcells.2014.0162. Epub 2014, Sep 26. PMID:25256219 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Succinate-semialdehyde dehydrogenase

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