- EMDB-21931: Human ER membrane protein complex in a lipid nanodisc, multi-body... -
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基本情報
登録情報
データベース: EMDB / ID: EMD-21931
タイトル
Human ER membrane protein complex in a lipid nanodisc, multi-body refinement, cytosolic map
マップデータ
'cytosolic' human EMC post-processed, sharpened, and masked map.
試料
複合体: Human ER Membrane Protein Complex
機能・相同性
機能・相同性情報
extrinsic component of endoplasmic reticulum membrane / inorganic cation transmembrane transporter activity / EMC complex / omegasome membrane / protein insertion into ER membrane by stop-transfer membrane-anchor sequence / magnesium ion transport / cobalt ion transmembrane transporter activity / Miscellaneous transport and binding events / tail-anchored membrane protein insertion into ER membrane / magnesium ion transmembrane transporter activity ...extrinsic component of endoplasmic reticulum membrane / inorganic cation transmembrane transporter activity / EMC complex / omegasome membrane / protein insertion into ER membrane by stop-transfer membrane-anchor sequence / magnesium ion transport / cobalt ion transmembrane transporter activity / Miscellaneous transport and binding events / tail-anchored membrane protein insertion into ER membrane / magnesium ion transmembrane transporter activity / ferrous iron transmembrane transporter activity / protein folding in endoplasmic reticulum / copper ion transport / autophagosome assembly / RHOA GTPase cycle / positive regulation of endothelial cell proliferation / positive regulation of endothelial cell migration / positive regulation of angiogenesis / early endosome membrane / carbohydrate binding / angiogenesis / early endosome / Golgi membrane / endoplasmic reticulum membrane / Golgi apparatus / endoplasmic reticulum / protein-containing complex / extracellular region / membrane / plasma membrane / cytoplasm 類似検索 - 分子機能
ER membrane protein complex subunit 8/9 / Uncharacterised protein family (UPF0172) / ER membrane protein complex subunit 7, beta-sandwich domain / ER membrane protein complex subunit 7 / ER membrane protein complex subunit 7, beta-sandwich domain / ER membrane protein complex subunit 6 / ER membrane protein complex subunit 3 / ER membrane protein complex subunit 1, C-terminal / Membrane magnesium transporter / ER membrane protein complex subunit 1 ...ER membrane protein complex subunit 8/9 / Uncharacterised protein family (UPF0172) / ER membrane protein complex subunit 7, beta-sandwich domain / ER membrane protein complex subunit 7 / ER membrane protein complex subunit 7, beta-sandwich domain / ER membrane protein complex subunit 6 / ER membrane protein complex subunit 3 / ER membrane protein complex subunit 1, C-terminal / Membrane magnesium transporter / ER membrane protein complex subunit 1 / ER membrane protein complex subunit 6-like / EMC6 / ER membrane protein complex subunit 1, C-terminal / Membrane magnesium transporter / ER membrane protein complex subunit 10 / ER membrane protein complex subunit 2-like / Integral membrane protein EMC3/TMCO1-like / Integral membrane protein EMC3/TMCO1-like / Integral membrane protein DUF106 / Carbohydrate-binding-like fold / Pyrrolo-quinoline quinone repeat / PQQ-like domain / Tetratricopeptide repeat / Quinoprotein alcohol dehydrogenase-like superfamily / TPR repeat region circular profile. / TPR repeat profile. / MPN domain / MPN domain profile. / Tetratricopeptide repeats / Tetratricopeptide repeat / Tetratricopeptide-like helical domain superfamily / WD40/YVTN repeat-like-containing domain superfamily 類似検索 - ドメイン・相同性
ER membrane protein complex subunit 8 / ER membrane protein complex subunit 2 / ER membrane protein complex subunit 10 / ER membrane protein complex subunit 5 / ER membrane protein complex subunit 1 / ER membrane protein complex subunit 6 / Endoplasmic reticulum membrane protein complex subunit 7 / ER membrane protein complex subunit 3 類似検索 - 構成要素
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
DP2GM137412
米国
引用
ジャーナル: Science / 年: 2020 タイトル: Structural basis for membrane insertion by the human ER membrane protein complex. 著者: Tino Pleiner / Giovani Pinton Tomaleri / Kurt Januszyk / Alison J Inglis / Masami Hazu / Rebecca M Voorhees / 要旨: A defining step in the biogenesis of a membrane protein is the insertion of its hydrophobic transmembrane helices into the lipid bilayer. The nine-subunit endoplasmic reticulum (ER) membrane protein ...A defining step in the biogenesis of a membrane protein is the insertion of its hydrophobic transmembrane helices into the lipid bilayer. The nine-subunit endoplasmic reticulum (ER) membrane protein complex (EMC) is a conserved co- and posttranslational insertase at the ER. We determined the structure of the human EMC in a lipid nanodisc to an overall resolution of 3.4 angstroms by cryo-electron microscopy, permitting building of a nearly complete atomic model. We used structure-guided mutagenesis to demonstrate that substrate insertion requires a methionine-rich cytosolic loop and occurs via an enclosed hydrophilic vestibule within the membrane formed by the subunits EMC3 and EMC6. We propose that the EMC uses local membrane thinning and a positively charged patch to decrease the energetic barrier for insertion into the bilayer.