1ASV

Avian sarcoma virus integrase catalytic core domain

1ASV の概要

• エントリーDOI: 10.2210/pdb1asv/pdb
• 分子名称: AVIAN SARCOMA VIRUS INTEGRASE (2 entities in total)
• 機能のキーワード: dna integration
• 由来する生物種: Avian sarcoma virus
• 細胞内の位置: Matrix protein p19: Virion (Potential). Capsid protein p27: Virion (Potential). Nucleocapsid protein p12: Virion (Potential): P03354
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 17939.56

構造登録者

Bujacz, G.,Jaskolski, M.,Alexandratos, J.,Wlodawer, A. (登録日: 1995-08-25, 公開日: 1995-11-14, 最終更新日: 2024-06-05)

主引用文献

Bujacz, G.,Jaskolski, M.,Alexandratos, J.,Wlodawer, A.,Merkel, G.,Katz, R.A.,Skalka, A.M.
High-resolution structure of the catalytic domain of avian sarcoma virus integrase.
J.Mol.Biol., 253:333-346, 1995

PubMed Abstract: Retroviral integrase (IN) functions to insert retroviral DNA into the host cell chromosome in a highly coordinated manner. IN catalyzes two biochemically separable reactions: processing of the viral DNA ends and joining of these ends to the host DNA. Previous studies suggested that these two reactions are chemically similar and are carried out by a single active site that is characterized by a highly conserved constellation of carboxylate residues, the D,D(35)E motif. We report here the crystal structure of the isolated catalytic domain of avian sarcoma virus (ASV) IN, solved using multiwavelength anomalous diffraction data for a selenomethionine derivative and refined at 1.7 A resolution. The protein is a crystallographic dimer with each monomer featuring a five-stranded mixed beta-sheet region surrounded by five alpha-helices. Based on the general fold and the arrangement of catalytic carboxylate residues, it is apparent that ASV IN is a member of a superfamily of proteins that also includes two types of nucleases, RuvC and RNase H. The general fold and the dimer interface are similar to those of the analogous domain of HIV-1 IN, whose crystal structure has been determined at 2.5 A resolution. However, the ASV IN structure is more complete in that all three critical carboxylic acids, Asp64, Asp121 and Glu157, are ordered. The ordered active site and the considerably higher resolution of the present structure are all important to an understanding of the mechanism of retroviral DNA integration, as well as for designing antiviral agents that may be effective against HIV.

PubMed: 7563093
DOI: 10.1006/jmbi.1995.0556

実験手法

X-RAY DIFFRACTION (2.2 Å)