1f7k

CRYSTAL STRUCTURES OF FELINE IMMUNODEFICIENCY VIRUS DUTP PYROPHOSPHATASE AND ITS NUCLEOTIDE COMPLEXES IN THREE CRYSTAL FORMS.

spinqualitylabelsall models 1f7k, resolution 2.20Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1f7k is a 2 chain structure with sequence from Fiv. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: MG, UMP Related: 1f7d, 1f7n, 1f7o, 1f7p, 1f7q, 1f7r Activity: dUTP diphosphatase, with EC number 3.6.1.23 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [POL_FIVPE] During replicative cycle of retroviruses, the reverse-transcribed viral DNA is integrated into the host chromosome by the viral integrase enzyme. RNase H activity is associated with the reverse transcriptase. 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 dUTP pyrophosphatase (dUTPase) cleaves the alpha-beta phosphodiester of dUTP to form pyrophosphate and dUMP, preventing incorporation of uracil into DNA and providing the substrate for thymine synthesis. Seven crystal structures of feline immunodeficiency virus (FIV) dUTPase in three crystal forms have been determined, including complexes with substrate (dUTP), product (dUMP) or inhibitor (dUDP) bound. The native enzyme has been refined at 1.40 A resolution in a hexagonal crystal form and at 2.3 A resolution in an orthorhombic crystal form. In the dUDP complex in a cubic crystal form refined at 2.5 A resolution, the C-terminal conserved P-loop motif is fully ordered. The analysis defines the roles of five sequence motifs in interaction with uracil, deoxyribose and the alpha-, beta- and gamma-phosphates. The enzyme utilizes adaptive recognition to bind the alpha- and beta-phosphates. In particular, the alpha-beta phosphodiester adopts an unfavorable eclipsed conformation in the presence of the P-loop. This conformation may be relevant to the mechanism of alpha-beta phosphodiester bond cleavage. Structures of feline immunodeficiency virus dUTP pyrophosphatase and its nucleotide complexes in three crystal forms.,Prasad GS, Stura EA, Elder JH, Stout CD Acta Crystallogr D Biol Crystallogr. 2000 Sep;56(Pt 9):1100-9. PMID:10957629 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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