2APO

Crystal Structure of the Methanococcus jannaschii Cbf5 Nop10 Complex

2APO の概要

• エントリーDOI: 10.2210/pdb2apo/pdb
• 分子名称: Probable tRNA pseudouridine synthase B, Ribosome biogenesis protein Nop10, POTASSIUM ION, ... (5 entities in total)
• 機能のキーワード: protein-protein complex, box h/aca, snornp, pseudouridine synthase, rna modification, zinc ribbon, pua domain, isomerase-rna binding protein complex, isomerase/rna binding protein
• 由来する生物種: Methanocaldococcus jannaschii; 詳細
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 48566.63

構造登録者

Hamma, T.,Reichow, S.L.,Varani, G.,Ferre-D'Amare, A.R. (登録日: 2005-08-16, 公開日: 2005-11-15, 最終更新日: 2024-11-13)

主引用文献

Hamma, T.,Reichow, S.L.,Varani, G.,Ferre-D'Amare, A.R.
The Cbf5-Nop10 complex is a molecular bracket that organizes box H/ACA RNPs.
Nat.Struct.Mol.Biol., 12:1101-1107, 2005

PubMed Abstract: Box H/ACA ribonucleoprotein particles (RNPs) catalyze RNA pseudouridylation and direct processing of ribosomal RNA, and are essential architectural components of vertebrate telomerases. H/ACA RNPs comprise four proteins and a multihelical RNA. Two proteins, Cbf5 and Nop10, suffice for basal enzymatic activity in an archaeal in vitro system. We now report their cocrystal structure at 1.95-A resolution. We find that archaeal Cbf5 can assemble with yeast Nop10 and with human telomerase RNA, consistent with the high sequence identity of the RNP components between archaea and eukarya. Thus, the Cbf5-Nop10 architecture is phylogenetically conserved. The structure shows how Nop10 buttresses the active site of Cbf5, and it reveals two basic troughs that bidirectionally extend the active site cleft. Mutagenesis results implicate an adjacent basic patch in RNA binding. This tripartite RNA-binding surface may function as a molecular bracket that organizes the multihelical H/ACA and telomerase RNAs.

PubMed: 16286935
DOI: 10.1038/nsmb1036

実験手法

X-RAY DIFFRACTION (1.95 Å)