3iwc

T. maritima AdoMetDC complex with S-Adenosylmethionine methyl ester

spinqualitylabelsall models 3iwc, resolution 1.90Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3iwc is a 4 chain structure with sequence from Thermotoga maritima. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.9Å Ligands: PYR, SMM Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function SPEH_THEMA 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 The polyamines putrescine, spermidine and spermine are ubiquitous aliphatic cations and are essential for cellular growth and differentiation. S-Adenosylmethionine decarboxylase (AdoMetDC) is a critical pyruvoyl-dependent enzyme in the polyamine-biosynthetic pathway. The crystal structures of AdoMetDC from humans and plants and of the AdoMetDC proenzyme from Thermotoga maritima have been obtained previously. Here, the crystal structures of activated T. maritima AdoMetDC (TmAdoMetDC) and of its complexes with S-adenosylmethionine methyl ester and 5'-deoxy-5'-dimethylthioadenosine are reported. The results demonstrate for the first time that TmAdoMetDC autoprocesses without the need for additional factors and that the enzyme contains two complete active sites, both of which use residues from both chains of the homodimer. The complexes provide insights into the substrate specificity and ligand binding of AdoMetDC in prokaryotes. The conservation of the ligand-binding mode and the active-site residues between human and T. maritima AdoMetDC provides insight into the evolution of AdoMetDC. Complexes of Thermotoga maritimaS-adenosylmethionine decarboxylase provide insights into substrate specificity.,Bale S, Baba K, McCloskey DE, Pegg AE, Ealick SE Acta Crystallogr D Biol Crystallogr. 2010 Feb;66(Pt 2):181-9. Epub 2010, Jan 22. PMID:20124698 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also SAM decarboxylase

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