- EMDB-33193: Structure of the SecA/SecYE/proOmpA(4Y)-sfGFP complex with ADP -
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基本情報
登録情報
データベース: EMDB / ID: EMD-33193
タイトル
Structure of the SecA/SecYE/proOmpA(4Y)-sfGFP complex with ADP
マップデータ
試料
複合体: Complex of the SecA/SecYE/proOmpA(4Y)-sfGFP with ADP.
複合体: SecA
タンパク質・ペプチド: Protein translocase subunit SecA
複合体: SecY
タンパク質・ペプチド: Protein translocase subunit SecY
複合体: SecE
タンパク質・ペプチド: Protein translocase subunit SecE
複合体: sfGFP
タンパク質・ペプチド: Translocating peptide
リガンド: MAGNESIUM ION
リガンド: ADENOSINE-5'-DIPHOSPHATE
キーワード
SecA ATPase / membrane protein / protein translocation / TRANSLOCATE / TRANSLOCASE
機能・相同性
機能・相同性情報
protein-exporting ATPase activity / cell envelope Sec protein transport complex / protein-secreting ATPase / intracellular protein transmembrane transport / protein transport by the Sec complex / protein import / protein secretion / protein transmembrane transporter activity / protein targeting / membrane raft ...protein-exporting ATPase activity / cell envelope Sec protein transport complex / protein-secreting ATPase / intracellular protein transmembrane transport / protein transport by the Sec complex / protein import / protein secretion / protein transmembrane transporter activity / protein targeting / membrane raft / ATP binding / metal ion binding / plasma membrane / cytoplasm 類似検索 - 分子機能
SecE subunit of protein translocation complex, bacterial-like / SecE superfamily / SEC-C motif / SEC-C motif / Protein translocase subunit SecA / SecA DEAD-like, N-terminal / SecA Wing/Scaffold / SecA, preprotein cross-linking domain / SecA motor DEAD / SecA conserved site ...SecE subunit of protein translocation complex, bacterial-like / SecE superfamily / SEC-C motif / SEC-C motif / Protein translocase subunit SecA / SecA DEAD-like, N-terminal / SecA Wing/Scaffold / SecA, preprotein cross-linking domain / SecA motor DEAD / SecA conserved site / SecA, Wing/Scaffold superfamily / SecA, preprotein cross-linking domain superfamily / SecA, C-terminal helicase domain / SecA preprotein cross-linking domain / SecA Wing and Scaffold domain / SecA DEAD-like domain / SecA P-loop domain / SecA family signature. / SecA family profile. / SecA DEAD-like domain / SecA preprotein cross-linking domain / Protein translocase subunit SecY / 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 / Helicase, C-terminal / Helicase superfamily 1/2, ATP-binding domain / P-loop containing nucleoside triphosphate hydrolase 類似検索 - ドメイン・相同性
Protein translocase subunit SecE / Protein translocase subunit SecY / Protein translocase subunit SecA 類似検索 - 構成要素
National Natural Science Foundation of China (NSFC)
31870835
中国
引用
ジャーナル: Proc Natl Acad Sci U S A / 年: 2023 タイトル: Structural basis of SecA-mediated protein translocation. 著者: Linlin Dong / Song Yang / Jingxia Chen / Xiaofei Wu / Dongjie Sun / Chen Song / Long Li / 要旨: Secretory proteins are cotranslationally or posttranslationally translocated across lipid membranes via a protein-conducting channel named SecY in prokaryotes and Sec61 in eukaryotes. The vast ...Secretory proteins are cotranslationally or posttranslationally translocated across lipid membranes via a protein-conducting channel named SecY in prokaryotes and Sec61 in eukaryotes. The vast majority of secretory proteins in bacteria are driven through the channel posttranslationally by SecA, a highly conserved ATPase. How a polypeptide chain is moved by SecA through the SecY channel is poorly understood. Here, we report electron cryomicroscopy structures of the active SecA-SecY translocon with a polypeptide substrate. The substrate is captured in different translocation states when clamped by SecA with different nucleotides. Upon binding of an ATP analog, SecA undergoes global conformational changes to push the polypeptide substrate toward the channel in a way similar to how the RecA-like helicases translocate their nucleic acid substrates. The movements of the polypeptide substrates in the SecA-SecY translocon share a similar structural basis to those in the ribosome-SecY complex during cotranslational translocation.