2e1z

Crystal structure of Salmonella typhimurium propionate kinase (TdcD) in complex with diadenosine tetraphosphate (Ap4A) obtained after co-crystallization with ATP

spinqualitylabelsall models 2e1z, resolution 1.98Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2e1z is a 1 chain structure with sequence from Salmonella enterica subsp. enterica serovar Typhimurium. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.98Å Ligands: B4P, EDO Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function TDCD_SALTY Catalyzes the conversion of propionyl phosphate and ADP to propionate and ATP. It can also use acetyl phosphate as phosphate group acceptor.[HAMAP-Rule:MF_01881] 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 Propionate kinase catalyses the last step in the anaerobic breakdown of L-threonine to propionate in which propionyl phosphate and ADP are converted to propionate and ATP. Here we report the structures of propionate kinase (TdcD) in the native form as well as in complex with diadenosine 5',5-P1,P4-tetraphosphate (Ap4A) by X-ray crystallography. Structure of TdcD obtained after cocrystallization with ATP showed Ap4A bound to the active site pocket suggesting the presence of Ap4A synthetic activity in TdcD. Binding of Ap4A to the enzyme was confirmed by the structure determination of a TdcD-Ap4A complex obtained after cocrystallization of TdcD with commercially available Ap4A. Mass spectroscopic studies provided further evidence for the formation of Ap4A by propionate kinase in the presence of ATP. In the TdcD-Ap4A complex structure, Ap4A is present in an extended conformation with one adenosine moiety present in the nucleotide binding site and other in the proposed propionate binding site. These observations tend to support direct in-line transfer of phosphoryl group during the kinase reaction. Crystal structures of Salmonella typhimurium propionate kinase and its complex with Ap4A: evidence for a novel Ap4A synthetic activity.,Simanshu DK, Savithri HS, Murthy MR Proteins. 2008 Mar;70(4):1379-88. PMID:17894350 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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