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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 / phospholipase C beta / coiled-coil domain / PH DOMAIN / EF HAND / C2 DOMAIN / TIM BARREL DOMAIN / phospholipase / GTP hydrolysis / G-protein signaling / membrane targeting / lipase / hydrolase / calcium binding / GTP binding / phospholipids / GTP-BINDING PROTEIN-HYDROLASE complex |
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