9JFS

Structure of Cas12p-TrxA-guide RNA-target DNA complex(29nt TS and 11nt NTS)

9JFS の概要

• エントリーDOI: 10.2210/pdb9jfs/pdb
• EMDBエントリー: 61438
• 分子名称: Cas12p, RNA (246-MER), DNA (29-MER), ... (5 entities in total)
• 機能のキーワード: crispr-cas, nuclease, heterodimer, rna binding protein/rna/dna, rna binding protein-rna-dna complex
• 由来する生物種: unidentified; 詳細
• タンパク質・核酸の鎖数: 5
• 化学式量合計: 188372.50

構造登録者

Wang, Z.P.,Wang, Y.J.,Ji, Q.J. (登録日: 2024-09-05, 公開日: 2025-09-10, 最終更新日: 2026-01-21)

主引用文献

Wang, Z.,Wang, Y.,Gao, H.,Dai, J.,Tang, N.,Wang, Y.,Ji, Q.
Phage-associated Cas12p nucleases require binding to bacterial thioredoxin for activation and cleavage of target DNA.
Nat Microbiol, 11:81-93, 2026

PubMed Abstract: The evolutionary competition within phage-host systems led to the emergence of CRISPR-Cas defence mechanisms in bacteria and anti-CRISPR elements in bacteriophages. Although anti-CRISPR elements are well characterized, the role of bacterial factors that influence CRISPR-Cas efficacy has been comparatively overlooked. Type V CRISPR-Cas12 systems display striking functional and mechanistic diversity for nucleic acid targeting. Here we use a bioinformatic approach to identify Cas12p, a phage-associated nuclease that forms complexes with the bacterial thioredoxin protein TrxA to enable target DNA degradation. This represents an unexpected phage-bacteria interaction, in which the bacteriophage co-opts a bacterial factor to augment its own genome degradation machinery, potentially against competing phages. Biochemical characterization, cryo-EM-based structural analysis of the Cas12p-TrxA-sgRNA-dsDNA complex at 2.67 Å and bacterial defence assays reveal that TrxA directly binds and activates Cas12p, enabling its nuclease activity and subsequent CRISPR immunity. These findings expand our understanding of the multilayered intricacies of phage-bacteria molecular interactions.

PubMed: 41492065
DOI: 10.1038/s41564-025-02224-z

実験手法

ELECTRON MICROSCOPY (2.67 Å)