- PDB-2akh: Normal mode-based flexible fitted coordinates of a non-translocat... -
+
データを開く
IDまたはキーワード:
読み込み中...
-
基本情報
登録情報
データベース: PDB / ID: 2akh
タイトル
Normal mode-based flexible fitted coordinates of a non-translocating SecYEG protein-conducting channel into the cryo-EM map of a SecYEG-nascent chain-70S ribosome complex from E. coli
要素
Preprotein translocase secE subunit
Preprotein translocase secY subunit
Protein-export membrane protein secG
キーワード
PROTEIN TRANSPORT / Translocation / Transmembrane / Transport
機能・相同性
機能・相同性情報
protein insertion into membrane from inner side / cell envelope Sec protein transport complex / intracellular protein transmembrane transport / protein transport by the Sec complex / protein-transporting ATPase activity / SRP-dependent cotranslational protein targeting to membrane, translocation / signal sequence binding / protein secretion / protein transmembrane transporter activity / membrane => GO:0016020 ...protein insertion into membrane from inner side / cell envelope Sec protein transport complex / intracellular protein transmembrane transport / protein transport by the Sec complex / protein-transporting ATPase activity / SRP-dependent cotranslational protein targeting to membrane, translocation / signal sequence binding / protein secretion / protein transmembrane transporter activity / membrane => GO:0016020 / protein targeting / intracellular protein transport / membrane / plasma membrane 類似検索 - 分子機能
Preprotein translocase SecG subunit / Preprotein translocase SecG subunit / SecE subunit of protein translocation complex, bacterial-like / SecE superfamily / 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 ...Preprotein translocase SecG subunit / Preprotein translocase SecG subunit / SecE subunit of protein translocation complex, bacterial-like / SecE superfamily / 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 類似検索 - ドメイン・相同性
Protein translocase subunit SecY / Protein translocase subunit SecE / Protein-export membrane protein SecG / Protein translocase subunit SecY / Protein translocase subunit SecE / Protein-export membrane protein SecG 類似検索 - 構成要素
ジャーナル: Nature / 年: 2005 タイトル: Structure of the E. coli protein-conducting channel bound to a translating ribosome. 著者: Kakoli Mitra / Christiane Schaffitzel / Tanvir Shaikh / Florence Tama / Simon Jenni / Charles L Brooks / Nenad Ban / Joachim Frank / 要旨: Secreted and membrane proteins are translocated across or into cell membranes through a protein-conducting channel (PCC). Here we present a cryo-electron microscopy reconstruction of the Escherichia ...Secreted and membrane proteins are translocated across or into cell membranes through a protein-conducting channel (PCC). Here we present a cryo-electron microscopy reconstruction of the Escherichia coli PCC, SecYEG, complexed with the ribosome and a nascent chain containing a signal anchor. This reconstruction shows a messenger RNA, three transfer RNAs, the nascent chain, and detailed features of both a translocating PCC and a second, non-translocating PCC bound to mRNA hairpins. The translocating PCC forms connections with ribosomal RNA hairpins on two sides and ribosomal proteins at the back, leaving a frontal opening. Normal mode-based flexible fitting of the archaeal SecYEbeta structure into the PCC electron microscopy densities favours a front-to-front arrangement of two SecYEG complexes in the PCC, and supports channel formation by the opening of two linked SecY halves during polypeptide translocation. On the basis of our observation in the translocating PCC of two segregated pores with different degrees of access to bulk lipid, we propose a model for co-translational protein translocation.