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-Structure paper
タイトル | Full-length Gα(q)-phospholipase C-β3 structure reveals interfaces of the C-terminal coiled-coil domain. |
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ジャーナル・号・ページ | Nat Struct Mol Biol, Vol. 20, Issue 3, Page 355-362, Year 2013 |
掲載日 | 2013年2月3日 |
著者 | Angeline M Lyon / Somnath Dutta / Cassandra A Boguth / Georgios Skiniotis / John J G Tesmer / |
PubMed 要旨 | Phospholipase C-β (PLCβ) is directly activated by Gαq, but the molecular basis for how its distal C-terminal domain (CTD) contributes to maximal activity is poorly understood. Herein we present ...Phospholipase C-β (PLCβ) is directly activated by Gαq, but the molecular basis for how its distal C-terminal domain (CTD) contributes to maximal activity is poorly understood. Herein we present both the crystal structure and cryo-EM three-dimensional reconstructions of human full-length PLCβ3 in complex with mouse Gαq. The distal CTD forms an extended monomeric helical bundle consisting of three antiparallel segments with structural similarity to membrane-binding bin-amphiphysin-Rvs (BAR) domains. Sequence conservation of the distal CTD suggests putative membrane and protein interaction sites, the latter of which bind the N-terminal helix of Gαq in both the crystal structure and cryo-EM reconstructions. Functional analysis suggests that the distal CTD has roles in membrane targeting and in optimizing the orientation of the catalytic core at the membrane for maximal rates of lipid hydrolysis. |
リンク | Nat Struct Mol Biol / PubMed:23377541 / PubMed Central |
手法 | EM (単粒子) / X線回折 |
解像度 | 4 - 21.0 Å |
構造データ | EMDB-2271: EMDB-5561: PDB-4gnk: |
化合物 | ChemComp-GDP: ChemComp-ALF: ChemComp-MG: ChemComp-CA: ChemComp-HOH: |
由来 |
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キーワード | GTP-BINDING PROTEIN/HYDROLASE / GTP-binding protein alpha subunits (Gタンパク質) / phospholipase C beta / coiled-coil domain (コイルドコイル) / PH DOMAIN / EF HAND (EFハンド) / C2 DOMAIN (C2ドメイン) / TIM BARREL DOMAIN (TIMバレル) / phospholipase (ホスホリパーゼ) / GTP hydrolysis / G-protein signaling (Gタンパク質) / membrane targeting / lipase (リパーゼ) / hydrolase (加水分解酵素) / calcium binding (カルシウム) / GTP binding / phospholipids (リン脂質) / GTP-BINDING PROTEIN-HYDROLASE complex |