7S58

Crystal Structure of the tick evasin EVA-P974 complexed to human chemokine CCL7

7S58 の概要

• エントリーDOI: 10.2210/pdb7s58/pdb
• 分子名称: Evasin P974, C-C motif chemokine 7 (3 entities in total)
• 機能のキーワード: inflammation, chemokine, evasin, evasin-chemokine complex, immune system
• 由来する生物種: Amblyomma cajennense (Cayenne tick, Acarus cajennensis); 詳細
• タンパク質・核酸の鎖数: 8
• 化学式量合計: 74706.25

構造登録者

Bhusal, R.P.,Devkota, S.R.,Aryal, P.,Wilce, M.C.J.,Stone, M.J. (登録日: 2021-09-10, 公開日: 2022-03-16, 最終更新日: 2024-10-23)

主引用文献

Bhusal, R.P.,Aryal, P.,Devkota, S.R.,Pokhrel, R.,Gunzburg, M.J.,Foster, S.R.,Lim, H.D.,Payne, R.J.,Wilce, M.C.J.,Stone, M.J.
Structure-guided engineering of tick evasins for targeting chemokines in inflammatory diseases.
Proc.Natl.Acad.Sci.USA, 119:-, 2022

PubMed Abstract: As natural chemokine inhibitors, evasin proteins produced in tick saliva are potential therapeutic agents for numerous inflammatory diseases. Engineering evasins to block the desired chemokines and avoid off-target side effects requires structural understanding of their target selectivity. Structures of the class A evasin EVA-P974 bound to human CC chemokine ligands 7 and 17 (CCL7 and CCL17) and to a CCL8-CCL7 chimera reveal that the specificity of class A evasins for chemokines of the CC subfamily is defined by conserved, rigid backbone-backbone interactions, whereas the preference for a subset of CC chemokines is controlled by side-chain interactions at four hotspots in flexible structural elements. Hotspot mutations alter target preference, enabling inhibition of selected chemokines. The structure of an engineered EVA-P974 bound to CCL2 reveals an underlying molecular mechanism of EVA-P974 target preference. These results provide a structure-based framework for engineering evasins as targeted antiinflammatory therapeutics.

PubMed: 35217625
DOI: 10.1073/pnas.2122105119

実験手法

X-RAY DIFFRACTION (1.82 Å)