4W8W

Crystal structure of oligomeric Cmr4 from Pyrococcus furiosus

4W8W の概要

• エントリーDOI: 10.2210/pdb4w8w/pdb
• 分子名称: CRISPR system Cmr subunit Cmr4 (2 entities in total)
• 機能のキーワード: cmr4, cmr complex, oligomeric, cripsr, hydrolase
• 由来する生物種: Pyrococcus furiosus
• 細胞内の位置: Cytoplasm : Q8U1S9
• タンパク質・核酸の鎖数: 4
• 化学式量合計: 138843.06

構造登録者

Benda, C.,Ebert, J.,Baumgaertner, M.,Conti, E. (登録日: 2014-08-26, 公開日: 2014-10-15, 最終更新日: 2024-05-08)

主引用文献

Benda, C.,Ebert, J.,Scheltema, R.A.,Schiller, H.B.,Baumgartner, M.,Bonneau, F.,Mann, M.,Conti, E.
Structural Model of a CRISPR RNA-Silencing Complex Reveals the RNA-Target Cleavage Activity in Cmr4.
Mol.Cell, 56:43-54, 2014

PubMed Abstract: The Cmr complex is an RNA-guided endonuclease that cleaves foreign RNA targets as part of the CRISPR prokaryotic defense system. We investigated the molecular architecture of the P. furiosus Cmr complex using an integrative structural biology approach. We determined crystal structures of P. furiosus Cmr1, Cmr2, Cmr4, and Cmr6 and combined them with known structural information to interpret the cryo-EM map of the complex. To support structure determination, we obtained residue-specific interaction data using protein crosslinking and mass spectrometry. The resulting pseudoatomic model reveals how the superhelical backbone of the complex is defined by the polymerizing principles of Cmr4 and Cmr5 and how it is capped at the extremities by proteins of similar folds. The inner surface of the superhelix exposes conserved residues of Cmr4 that we show are required for target-cleavage activity. The structural and biochemical data thus identify Cmr4 as the conserved endoribonuclease of the Cmr complex.

PubMed: 25280103
DOI: 10.1016/j.molcel.2014.09.002

実験手法

X-RAY DIFFRACTION (2.803 Å)