1pv9

Prolidase from Pyrococcus furiosusProlidase from Pyrococcus furiosus

Structural highlights 1pv9 is a 2 chain structure with sequence from Pyrococcus furiosus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: Gene: PEPQ OR PF1343 (Pyrococcus furiosus) Activity: Xaa-Pro dipeptidase, with EC number 3.4.13.9 Resources: FirstGlance, OCA, RCSB, PDBsum Function [PEPQ_PYRFU] Splits dipeptides with a prolyl in the C-terminal position and a nonpolar amino acid at the N-terminal position. 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 structure of prolidase from the hyperthermophilic archaeon Pyrococcus furiosus (Pfprol) has been solved and refined at 2.0 A resolution. This is the first structure of a prolidase, i.e., a peptidase specific for dipeptides having proline as the second residue. The asymmetric unit of the crystals contains a homodimer of the enzyme. Each of the two protein subunits has two domains. The C-terminal domain includes the catalytic site, which is centered on a dinuclear metal cluster. In the as-isolated form of Pfprol, the active-site metal atoms are Co(II) [Ghosh, M., et al. (1998) J. Bacteriol. 180, 4781-9]. An unexpected finding is that in the crystalline enzyme the active-site metal atoms are Zn(II), presumably as a result of metal exchange during crystallization. Both of the Zn(II) atoms are five-coordinate. The ligands include a bridging water molecule or hydroxide ion, which is likely to act as a nucleophile in the catalytic reaction. The two-domain polypeptide fold of Pfprol is similar to the folds of two functionally related enzymes, aminopeptidase P (APPro) and creatinase. In addition, the catalytic C-terminal domain of Pfprol has a polypeptide fold resembling that of the sole domain of a fourth enzyme, methionine aminopeptidase (MetAP). The active sites of APPro and MetAP, like that of Pfprol, include a dinuclear metal center. The metal ligands in the three enzymes are homologous. Comparisons with the molecular structures of APPro and MetAP suggest how Pfprol discriminates against oligopeptides and in favor of Xaa-Pro substrates. The crystal structure of Pfprol was solved by multiple-wavelength anomalous dispersion. The crystals yielded diffraction data of relatively high quality and resolution, despite the fact that one of the two protein subunits in the asymmetric unit was found to be significantly disordered. The final R and R(free) values are 0.24 and 0.28, respectively. Structure of the prolidase from Pyrococcus furiosus.,Maher MJ, Ghosh M, Grunden AM, Menon AL, Adams MW, Freeman HC, Guss JM Biochemistry. 2004 Mar 16;43(10):2771-83. PMID:15005612 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

spinqualitylabelsall models 1pv9, resolution 2.00Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image