1YZ9

Crystal structure of RNase III mutant E110Q from Aquifex aeolicus complexed with double stranded RNA at 2.1-Angstrom Resolution

1YZ9 の概要

• エントリーDOI: 10.2210/pdb1yz9/pdb
• 関連するPDBエントリー: 1I4S 1JFZ 1O0W 1RC5 1RC7 1YYK 1YYO 1YYW
• 分子名称: 5'-R(*CP*GP*AP*AP*CP*UP*UP*CP*GP*CP*G)-3', Ribonuclease III, SULFATE ION, ... (4 entities in total)
• 機能のキーワード: ribonuclease iii, double-stranded rna, rna interference, endonucleolytic cleavage, hydrolase-rna complex, hydrolase/rna
• 由来する生物種: Aquifex aeolicus
• 細胞内の位置: Cytoplasm (By similarity): O67082
• タンパク質・核酸の鎖数: 6
• 化学式量合計: 66893.75

構造登録者

Gan, J.,Tropea, J.E.,Austin, B.P.,Court, D.L.,Waugh, D.S.,Ji, X. (登録日: 2005-02-28, 公開日: 2005-11-22, 最終更新日: 2023-10-25)

主引用文献

Gan, J.,Tropea, J.E.,Austin, B.P.,Court, D.L.,Waugh, D.S.,Ji, X.
Intermediate states of ribonuclease III in complex with double-stranded RNA
Structure, 13:1435-1442, 2005

PubMed Abstract: Bacterial ribonuclease III (RNase III) can affect RNA structure and gene expression in either of two ways: as a processing enzyme that cleaves double-stranded (ds) RNA, or as a binding protein that binds but does not cleave dsRNA. We previously proposed a model of the catalytic complex of RNase III with dsRNA based on three crystal structures, including the endonuclease domain of RNase III with and without bound metal ions and a dsRNA binding protein complexed with dsRNA. We also reported a noncatalytic assembly observed in the crystal structure of an RNase III mutant, which binds but does not cleave dsRNA, complexed with dsRNA. We hypothesize that the RNase III*dsRNA complex can exist in two functional forms, a catalytic complex and a noncatalytic assembly, and that in between the two forms there may be intermediate states. Here, we present four crystal structures of RNase III complexed with dsRNA, representing possible intermediates.

PubMed: 16216575
DOI: 10.1016/j.str.2005.06.014

実験手法

X-RAY DIFFRACTION (2.1 Å)