2w37

CRYSTAL STRUCTURE OF THE HEXAMERIC CATABOLIC ORNITHINE TRANSCARBAMYLASE FROM Lactobacillus hilgardii

spinqualitylabelsall models 2w37, resolution 2.10Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2w37 is a 3 chain structure with sequence from "lactobacillus_type_ii"_fornachon_1943 "lactobacillus type ii" fornachon 1943. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: NI Activity: Ornithine carbamoyltransferase, with EC number 2.1.3.3 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed Catabolic ornithine transcarbamylase (cOTC; EC 2.1.3.3) catalyzes the formation of ornithine (ORN) and carbamoyl phosphate from citrulline, which constitutes the second step of the degradation of arginine via the arginine deiminase pathway. Here, we report the crystal structure of cOTC from the lactic acid bacteria Lactobacillus hilgardii (Lh-cOTC) refined to 2.1 A resolution. The structure reveals that Lh-cOTC forms a hexameric assembly, which was also confirmed by gel-filtration chromatography and analytical ultracentrifugation. The homohexamer, with 32 point group symmetry, represents a new oligomeric state within the members of the ornithine transcarbamylase family that are typically homotrimeric or homododecameric. The C-terminal end from each subunit constitutes a key structural element for the stabilization of the hexameric assembly in solution. Additionally, the structure reveals, for the first time in the ornithine transcarbamylase family, a metal-binding site located at the 3-fold molecular symmetry axis of each trimer. Crystal structure of the hexameric catabolic ornithine transcarbamylase from Lactobacillus hilgardii: Structural insights into the oligomeric assembly and metal binding.,de Las Rivas B, Fox GC, Angulo I, Ripoll MM, Rodriguez H, Munoz R, Mancheno JM J Mol Biol. 2009 Oct 23;393(2):425-34. Epub 2009 Aug 8. PMID:19666033 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Ornithine carbamoyltransferase 3D structures

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