5KLP

Crystal structure of HopZ1a in complex with IP6

5KLP の概要

• エントリーDOI: 10.2210/pdb5klp/pdb
• 関連するPDBエントリー: 5KLQ
• 分子名称: Orf34, INOSITOL HEXAKISPHOSPHATE, CITRIC ACID, ... (4 entities in total)
• 機能のキーワード: ser/thr acetyltransferase, transferase
• 由来する生物種: Pseudomonas syringae pv. syringae
• タンパク質・核酸の鎖数: 3
• 化学式量合計: 117722.53

構造登録者

Zhang, Z.-M.,Song, J. (登録日: 2016-06-24, 公開日: 2016-08-10, 最終更新日: 2024-10-23)

主引用文献

Zhang, Z.M.,Ma, K.W.,Yuan, S.,Luo, Y.,Jiang, S.,Hawara, E.,Pan, S.,Ma, W.,Song, J.
Structure of a pathogen effector reveals the enzymatic mechanism of a novel acetyltransferase family.
Nat.Struct.Mol.Biol., 23:847-852, 2016

PubMed Abstract: Effectors secreted by the type III secretion system are essential for bacterial pathogenesis. Members of the Yersinia outer-protein J (YopJ) family of effectors found in diverse plant and animal pathogens depend on a protease-like catalytic triad to acetylate host proteins and produce virulence. However, the structural basis for this noncanonical acetyltransferase activity remains unknown. Here, we report the crystal structures of the YopJ effector HopZ1a, produced by the phytopathogen Pseudomonas syringae, in complex with the eukaryote-specific cofactor inositol hexakisphosphate (IP6) and/or coenzyme A (CoA). Structural, computational and functional characterizations reveal a catalytic core with a fold resembling that of ubiquitin-like cysteine proteases and an acetyl-CoA-binding pocket formed after IP6-induced structural rearrangements. Modeling-guided mutagenesis further identified key IP6-interacting residues of Salmonella effector AvrA that are required for acetylating its substrate. Our study reveals the structural basis of a novel class of acetyltransferases and the conserved allosteric regulation of YopJ effectors by IP6.

PubMed: 27525589
DOI: 10.1038/nsmb.3279

実験手法

X-RAY DIFFRACTION (2.002 Å)