- EMDB-29610: Cryo-EM map of chimeric Sec complex (human Sec61 and yeast Sec63-... -
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データベース: EMDB / ID: EMD-29610
タイトル
Cryo-EM map of chimeric Sec complex (human Sec61 and yeast Sec63-71-72) inhibited by apratoxin F
マップデータ
Unsharpened map of Apratoxin F bound chimeric Sec complex (whole)
試料
複合体: A human-yeast chimeric Sec complex treated with apratoxin F
タンパク質・ペプチド: Human Sec61 gamma subunit
タンパク質・ペプチド: Human Sec61 beta subunit
タンパク質・ペプチド: Human Sec61 alpha subunit (loop mutant)
タンパク質・ペプチド: Yeast Sec71
タンパク質・ペプチド: Yeast Sec72
タンパク質・ペプチド: Yeast-human chimeric Sec63
キーワード
Sec61 / translocon / apratoxin / inhibitor / protein translocation / PROTEIN TRANSPORT
機能・相同性
機能・相同性情報
Sec62/Sec63 complex / translocon complex / cytosol to endoplasmic reticulum transport / endoplasmic reticulum Sec complex / pronephric nephron development / rough endoplasmic reticulum membrane / endoplasmic reticulum quality control compartment / cotranslational protein targeting to membrane / Ssh1 translocon complex / Sec61 translocon complex ...Sec62/Sec63 complex / translocon complex / cytosol to endoplasmic reticulum transport / endoplasmic reticulum Sec complex / pronephric nephron development / rough endoplasmic reticulum membrane / endoplasmic reticulum quality control compartment / cotranslational protein targeting to membrane / Ssh1 translocon complex / Sec61 translocon complex / protein targeting to ER / protein insertion into ER membrane / post-translational protein targeting to endoplasmic reticulum membrane / SRP-dependent cotranslational protein targeting to membrane, translocation / filamentous growth / signal sequence binding / SRP-dependent cotranslational protein targeting to membrane / post-translational protein targeting to membrane, translocation / endoplasmic reticulum organization / nuclear inner membrane / epidermal growth factor binding / retrograde protein transport, ER to cytosol / Insertion of tail-anchored proteins into the endoplasmic reticulum membrane / protein transmembrane transporter activity / SRP-dependent cotranslational protein targeting to membrane / response to type II interferon / ERAD pathway / guanyl-nucleotide exchange factor activity / cell periphery / calcium channel activity / ER-Phagosome pathway / ribosome binding / endoplasmic reticulum membrane / endoplasmic reticulum / mitochondrion / RNA binding / membrane / cytosol 類似検索 - 分子機能
Translocation protein Sec66 / Preprotein translocase subunit Sec66 / Protein transport Sec61-beta/Sbh / Protein transport protein SecG/Sec61-beta/Sbh / Sec61beta family / Protein translocase SEC61 complex, gamma subunit / Protein translocase SecE domain superfamily / Translocon Sec61/SecY, plug domain / Plug domain of Sec61p / Nt-dnaJ domain signature. ...Translocation protein Sec66 / Preprotein translocase subunit Sec66 / Protein transport Sec61-beta/Sbh / Protein transport protein SecG/Sec61-beta/Sbh / Sec61beta family / Protein translocase SEC61 complex, gamma subunit / Protein translocase SecE domain superfamily / Translocon Sec61/SecY, plug domain / Plug domain of Sec61p / Nt-dnaJ domain signature. / DnaJ domain, conserved site / Protein secE/sec61-gamma signature. / Protein secY signature 1. / Protein secY signature 2. / SecE/Sec61-gamma subunits of protein translocation complex / Protein translocase complex, SecE/Sec61-gamma subunit / SecY/SEC61-alpha family / SecY domain superfamily / SecY conserved site / SecY / DnaJ domain / Sec63 domain / Sec63 Brl domain / DnaJ molecular chaperone homology domain / dnaJ domain profile. / Chaperone J-domain superfamily / DnaJ domain / Tetratricopeptide repeats / Tetratricopeptide repeat / Tetratricopeptide-like helical domain superfamily / Immunoglobulin E-set 類似検索 - ドメイン・相同性
Protein translocation protein SEC63 / Translocation protein SEC66 / Translocation protein SEC72 / Protein transport protein Sec61 subunit gamma / Protein transport protein Sec61 subunit beta / Protein transport protein Sec61 subunit alpha isoform 1 類似検索 - 構成要素
生物種
Homo sapiens (ヒト) / Saccharomyces cerevisiae (パン酵母)
ジャーナル: Nat Chem Biol / 年: 2023 タイトル: A common mechanism of Sec61 translocon inhibition by small molecules. 著者: Samuel Itskanov / Laurie Wang / Tina Junne / Rumi Sherriff / Li Xiao / Nicolas Blanchard / Wei Q Shi / Craig Forsyth / Dominic Hoepfner / Martin Spiess / Eunyong Park / 要旨: The Sec61 complex forms a protein-conducting channel in the endoplasmic reticulum membrane that is required for secretion of soluble proteins and production of many membrane proteins. Several natural ...The Sec61 complex forms a protein-conducting channel in the endoplasmic reticulum membrane that is required for secretion of soluble proteins and production of many membrane proteins. Several natural and synthetic small molecules specifically inhibit Sec61, generating cellular effects that are useful for therapeutic purposes, but their inhibitory mechanisms remain unclear. Here we present near-atomic-resolution structures of human Sec61 inhibited by a comprehensive panel of structurally distinct small molecules-cotransin, decatransin, apratoxin, ipomoeassin, mycolactone, cyclotriazadisulfonamide and eeyarestatin. All inhibitors bind to a common lipid-exposed pocket formed by the partially open lateral gate and plug domain of Sec61. Mutations conferring resistance to the inhibitors are clustered at this binding pocket. The structures indicate that Sec61 inhibitors stabilize the plug domain in a closed state, thereby preventing the protein-translocation pore from opening. Our study provides the atomic details of Sec61-inhibitor interactions and the structural framework for further pharmacological studies and drug design.