4ZKJ

Crystal structure of CRISPR-associated protein

4ZKJ の概要

• エントリーDOI: 10.2210/pdb4zkj/pdb
• 分子名称: CRISPR-associated protein Cas1, GLYCEROL (3 entities in total)
• 機能のキーワード: crispr, cas, unknown function
• 由来する生物種: Streptococcus pyogenes M1 476
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 68727.45

構造登録者

Ka, D.,Bae, E. (登録日: 2015-04-30, 公開日: 2016-01-13, 最終更新日: 2024-11-20)

主引用文献

Ka, D.,Lee, H.,Jung, Y.D.,Kim, K.,Seok, C.,Suh, N.,Bae, E.
Crystal Structure of Streptococcus pyogenes Cas1 and Its Interaction with Csn2 in the Type II CRISPR-Cas System
Structure, 24:70-79, 2016

PubMed Abstract: CRISPRs and Cas proteins constitute an RNA-guided microbial immune system against invading nucleic acids. Cas1 is a universal Cas protein found in all three types of CRISPR-Cas systems, and its role is implicated in new spacer acquisition during CRISPR-mediated adaptive immunity. Here, we report the crystal structure of Streptococcus pyogenes Cas1 (SpCas1) in a type II CRISPR-Cas system and characterize its interaction with S. pyogenes Csn2 (SpCsn2). The SpCas1 structure reveals a unique conformational state distinct from type I Cas1 structures, resulting in a more extensive dimerization interface, a more globular overall structure, and a disruption of potential metal-binding sites for catalysis. We demonstrate that SpCas1 directly interacts with SpCsn2, and identify the binding interface and key residues for Cas complex formation. These results provide structural information for a type II Cas1 protein, and lay a foundation for studying multiprotein Cas complexes functioning in type II CRISPR-Cas systems.

PubMed: 26671707
DOI: 10.1016/j.str.2015.10.019

実験手法

X-RAY DIFFRACTION (2.25 Å)