5c3u

Crystal structure of a fungal L-serine ammonia-lyase from Rhizomucor miehei

spinqualitylabelsall models 5c3u, resolution 1.76Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5c3u is a 1 chain structure with sequence from Rhizomucor miehei CAU432. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: PLP Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function A0A0X1KHE6_RHIMI Publication Abstract from PubMed l-serine ammonia-lyase, as a member of the beta-family of pyridoxal-5'-phosphate (PLP) dependent enzymes, catalyzes the conversion of l-serine (l-threonine) to pyruvate (alpha-ketobutyrate) and ammonia. The crystal structure of l-serine ammonia-lyase from Rhizomucor miehei (RmSDH) was solved at 1.76 A resolution by X-ray diffraction method. The overall structure of RmSDH had the characteristic beta-family PLP dependent enzyme fold. It consisted of two distinct domains, both of which show the typical open twisted alpha/beta structure. A PLP cofactor was located in the crevice between the two domains, which was attached to Lys52 by a Schiff-base linkage. Unique residue substitutions (Gly78, Pro79, Ser146, Ser147 and Thr312) were discovered at the catalytic site of RmSDH by comparison of structures of RmSDH and other reported eukaryotic l-serine ammonia-lyases. Optimal pH and temperature of the purified RmSDH were 7.5 and 40 degrees C, respectively. It was stable in the pH range of 7.0-9.0 and at temperatures below 40 degrees C. This is the first crystal structure of a fungal l-serine ammonia-lyase. It will be useful to study the catalytic mechanism of beta-elimination enzymes and will provide a basis for further enzyme engineering. Crystal structure and characterization of a novel l-serine ammonia-lyase from Rhizomucor miehei.,Qin Z, Yan Q, Ma Q, Jiang Z Biochem Biophys Res Commun. 2015 Oct 23;466(3):431-7. doi:, 10.1016/j.bbrc.2015.09.043. Epub 2015 Sep 11. PMID:26367174 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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