1kp4

CALCIUM-BOUND FORM OF PROKARYOTIC PHOSPHOLIPASE A2

spinqualitylabelsall models 1kp4, resolution 1.60Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1kp4 is a 1 chain structure with sequence from Streptomyces violaceoruber. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.6Å Ligands: CA Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q6UV28_STRVN 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 In this study, the x-ray crystal structures of the calcium-free and calcium-bound forms of phospholipase A(2) (PLA(2)), produced extracellularly by Streptomyces violaceoruber, were determined by using the multiple isomorphous replacement and molecular replacement methods, respectively. The former and latter structures were refined to an R-factor of 18.8% at a 1.4-A resolution and an R-factor of 15.0% at a 1.6-A resolution, respectively. The overall structure of the prokaryotic PLA(2) exhibits a novel folding topology that demonstrates that it is completely distinct from those of eukaryotic PLA(2)s, which have been already determined by x-ray and NMR analyses. Furthermore, the coordination geometry of the calcium(II) ion apparently deviated from that of eukaryotic PLA(2)s. Regardless of the evolutionary divergence, the catalytic mechanism including the calcium(II) ion on secreted PLA(2) seems to be conserved between prokaryotic and eukaryotic cells. Demonstrating that the overall structure determined by x-ray analysis is almost the same as that determined by NMR analysis is useful to discuss the catalytic mechanism at the molecular level of the bacterial PLA(2). The crystal structure of prokaryotic phospholipase A2.,Matoba Y, Katsube Y, Sugiyama M J Biol Chem. 2002 May 31;277(22):20059-69. Epub 2002 Mar 15. PMID:11897785 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Phospholipase A2 3D structures

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