2e28

Crystal structure analysis of pyruvate kinase from Bacillus stearothermophilusCrystal structure analysis of pyruvate kinase from Bacillus stearothermophilus

Structural highlights 2e28 is a 1 chain structure with sequence from Atcc 12980. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: Activity: Pyruvate kinase, with EC number 2.7.1.40 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum 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 pyruvate kinase (PK) from a moderate thermophile, Geobacillus stearothermophilus, is an allosteric enzyme activated by AMP and ribose 5-phosphate but not fructose 1, 6-bisphosphate (FBP), which is a common activator of PKs. It has an extra C-terminal sequence (ECTS), which contains a highly conserved phosphoenolpyruvate (PEP) binding motif, but its function and structure remain unclear. To elucidate the structural characteristics of the effector-binding site and the ECTS, the crystal structure of the C9S/C268S mutant of the enzyme was determined at 2.4 A resolution. The crystal belonged to space group P6(2)22, with unit cell parameters a, b = 145.97 A, c = 118.03 A. The enzyme was a homotetramer and its overall domain structure was similar to the previously solved structures except that the ECTS formed a new domain (C' domain). The structure of the C' domain closely resembled that of the PEP binding domain of maize pyruvate phosphate dikinase. A sulphate ion was found in a pocket in the effector-binding C domain. This site corresponds to the 6-phosphate group-binding site in yeast PK bound FBP and seems to be the effector-binding site. Through comparison of the structure of the putative effector-binding site to that of the FBP binding site of the yeast enzyme, the structural basis of the effector specificity of the G. stearothermophilus PK is discussed. Crystal structure of pyruvate kinase from Geobacillus stearothermophilus.,Suzuki K, Ito S, Shimizu-Ibuka A, Sakai H J Biochem. 2008 Sep;144(3):305-12. Epub 2008 May 28. PMID:18511452 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Pyruvate Kinase

spinqualitylabelsall models 2e28, resolution 2.40Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image