- EMDB-16017: Molecular view of ER membrane remodeling by the Sec61/TRAP translocon. -
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基本情報
登録情報
データベース: EMDB / ID: EMD-16017
タイトル
Molecular view of ER membrane remodeling by the Sec61/TRAP translocon.
マップデータ
試料
複合体: Mammlian Ribosome Sec61 TRAP complex
タンパク質・ペプチド: x 16種
RNA: x 2種
タンパク質・ペプチド: x 1種
キーワード
Membrane protein / protein translocation / protein biogenesis. / TRANSPORT PROTEIN
機能・相同性
機能・相同性情報
SRP-dependent cotranslational protein targeting to membrane / ribosomal subunit / protein transmembrane transporter activity / protein targeting / maturation of LSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / intracellular protein transport / large ribosomal subunit / cytosolic large ribosomal subunit / in utero embryonic development / cytoplasmic translation ...SRP-dependent cotranslational protein targeting to membrane / ribosomal subunit / protein transmembrane transporter activity / protein targeting / maturation of LSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / intracellular protein transport / large ribosomal subunit / cytosolic large ribosomal subunit / in utero embryonic development / cytoplasmic translation / rRNA binding / structural constituent of ribosome / ribosome / translation / ribonucleoprotein complex / mRNA binding / endoplasmic reticulum membrane / RNA binding / zinc ion binding / cytoplasm 類似検索 - 分子機能
Translocon-associated / Translocon-associated protein subunit beta / Translocon-associated protein subunit gamma / Translocon-associated protein, delta subunit precursor (TRAP-delta) / Translocon-associated protein beta (TRAPB) / Translocon-associated protein, gamma subunit (TRAP-gamma) / Protein translocase SEC61 complex, gamma subunit / Protein translocase SecE domain superfamily / Protein secE/sec61-gamma signature. / SecE/Sec61-gamma subunits of protein translocation complex ...Translocon-associated / Translocon-associated protein subunit beta / Translocon-associated protein subunit gamma / Translocon-associated protein, delta subunit precursor (TRAP-delta) / Translocon-associated protein beta (TRAPB) / Translocon-associated protein, gamma subunit (TRAP-gamma) / Protein translocase SEC61 complex, gamma subunit / Protein translocase SecE domain superfamily / Protein secE/sec61-gamma signature. / SecE/Sec61-gamma subunits of protein translocation complex / Protein translocase complex, SecE/Sec61-gamma subunit / Ribosomal protein L23 / Ribosomal protein L22e / Ribosomal protein L22e superfamily / Ribosomal L22e protein family / Ribosomal protein L19/L19e conserved site / Ribosomal protein L19, eukaryotic / Ribosomal protein L19e signature. / Ribosomal protein L23/L25, N-terminal / Ribosomal protein L23, N-terminal domain / 60S ribosomal protein L19 / 60S ribosomal protein L35 / Ribosomal protein L19e, C-terminal domain / Ribosomal_L19e / Ribosomal protein L19/L19e / Ribosomal protein L19/L19e, domain 1 / Ribosomal protein L31e, conserved site / Ribosomal protein L19/L19e superfamily / Ribosomal protein L19e, N-terminal domain / Ribosomal protein L31e signature. / Ribosomal protein L31e / Ribosomal protein L31e domain superfamily / Ribosomal protein L31e / Ribosomal_L31e / Ribosomal protein L22/L17, eukaryotic/archaeal / Ribosomal protein L37e, conserved site / Ribosomal protein L37e signature. / Ribosomal protein L37e / Ribosomal protein L37e / Ribosomal protein L37ae/L37e / Ribosomal protein L26/L24, eukaryotic/archaeal / Ribosomal proteins L26 eukaryotic, L24P archaeal / Ribosomal protein L23/L25, conserved site / Ribosomal protein L23 signature. / Ribosomal protein L29, conserved site / Ribosomal protein L29 signature. / Ribosomal protein L22/L17, conserved site / Ribosomal protein L22 signature. / Ribosomal L29 protein / Ribosomal protein L29/L35 / Ribosomal protein L29/L35 superfamily / Ribosomal protein L24 signature. / Ribosomal protein L24/L26, conserved site / KOW (Kyprides, Ouzounis, Woese) motif. / Ribosomal protein L23 / Ribosomal protein L25/L23 / Ribosomal protein L22/L17 / Ribosomal protein L22p/L17e / Ribosomal protein L22/L17 superfamily / Ribosomal protein L26/L24, KOW domain / Ribosomal protein L23/L15e core domain superfamily / Translation protein SH3-like domain superfamily / Zinc-binding ribosomal protein / KOW motif / KOW / Ribosomal protein L2, domain 2 / Nucleotide-binding alpha-beta plait domain superfamily 類似検索 - ドメイン・相同性
Large ribosomal subunit protein uL23 / Large ribosomal subunit protein uL29 / Large ribosomal subunit protein eL22 / RL26 protein / Protein transport protein Sec61 subunit gamma / Translocon-associated protein subunit gamma / Ribosomal protein L37 / Translocon-associated protein subunit beta / Translocon-associated protein subunit delta / Ribosomal protein L19 ...Large ribosomal subunit protein uL23 / Large ribosomal subunit protein uL29 / Large ribosomal subunit protein eL22 / RL26 protein / Protein transport protein Sec61 subunit gamma / Translocon-associated protein subunit gamma / Ribosomal protein L37 / Translocon-associated protein subunit beta / Translocon-associated protein subunit delta / Ribosomal protein L19 / Large ribosomal subunit protein eL31 / Large ribosomal subunit protein uL22 類似検索 - 構成要素
ジャーナル: EMBO Rep / 年: 2023 タイトル: Molecular view of ER membrane remodeling by the Sec61/TRAP translocon. 著者: Sudeep Karki / Matti Javanainen / Shahid Rehan / Dale Tranter / Juho Kellosalo / Juha T Huiskonen / Lotta Happonen / Ville Paavilainen / 要旨: Protein translocation across the endoplasmic reticulum (ER) membrane is an essential step during protein entry into the secretory pathway. The conserved Sec61 protein-conducting channel facilitates ...Protein translocation across the endoplasmic reticulum (ER) membrane is an essential step during protein entry into the secretory pathway. The conserved Sec61 protein-conducting channel facilitates polypeptide translocation and coordinates cotranslational polypeptide-processing events. In cells, the majority of Sec61 is stably associated with a heterotetrameric membrane protein complex, the translocon-associated protein complex (TRAP), yet the mechanism by which TRAP assists in polypeptide translocation remains unknown. Here, we present the structure of the core Sec61/TRAP complex bound to a mammalian ribosome by cryogenic electron microscopy (cryo-EM). Ribosome interactions anchor the Sec61/TRAP complex in a conformation that renders the ER membrane locally thinner by significantly curving its lumenal leaflet. We propose that TRAP stabilizes the ribosome exit tunnel to assist nascent polypeptide insertion through Sec61 and provides a ratcheting mechanism into the ER lumen mediated by direct polypeptide interactions.