2Y20

The mechanisms of HAMP-mediated signaling in transmembrane receptors - the A291I mutant

2Y20 の概要

• エントリーDOI: 10.2210/pdb2y20/pdb
• 関連するPDBエントリー: 2Y0Q 2Y0T 2Y21 3ZRV 3ZRW 3ZRX
• 分子名称: UNCHARACTERIZED PROTEIN, ZINC ION (3 entities in total)
• 機能のキーワード: membrane protein, transmembrane signalling
• 由来する生物種: ARCHAEOGLOBUS FULGIDUS
• タンパク質・核酸の鎖数: 6
• 化学式量合計: 39369.10

構造登録者

Zeth, K.,Ferris, H.U.,Hulko, M.,Lupas, A.N. (登録日: 2010-12-12, 公開日: 2011-07-20, 最終更新日: 2024-05-08)

主引用文献

Ferris, H.U.,Dunin-Horkawicz, S.,Mondejar, L.G.,Hulko, M.,Hantke, K.,Martin, J.,Schultz, J.E.,Zeth, K.,Lupas, A.N.,Coles, M.
The Mechanisms of Hamp-Mediated Signaling in Transmembrane Receptors.
Structure, 19:378-, 2011

PubMed Abstract: HAMP domains mediate signal transduction in over 7500 enzyme-coupled receptors represented in all kingdoms of life. The HAMP domain of the putative archaeal receptor Af1503 has a parallel, dimeric, four-helical coiled coil structure, but with unusual core packing, related to canonical packing by concerted axial rotation of the helices. This has led to the gearbox model for signal transduction, whereby the alternate packing modes correspond to signaling states. Here we present structures of a series of Af1503 HAMP variants. We show that substitution of a conserved small side chain within the domain core (A291) for larger residues induces a gradual transition in packing mode, involving both changes in helix rotation and bundle shape, which are most prominent at the C-terminal, output end of the domain. These are correlated with activity and ligand response in vitro and in vivo by incorporating Af1503 HAMP into mycobacterial adenylyl cyclase assay systems.

PubMed: 21397188
DOI: 10.1016/J.STR.2011.01.006

実験手法

X-RAY DIFFRACTION (1.65 Å)