- PDB-7okn: Structure of the outer-membrane core complex (inner ring) from a ... -
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基本情報
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データベース: PDB / ID: 7okn
タイトル
Structure of the outer-membrane core complex (inner ring) from a conjugative type IV secretion system
要素
TraB
Type IV conjugative transfer system lipoprotein TraV
キーワード
MEMBRANE PROTEIN / Type IV secretion system / F plasmid / outer-membrane core complex / conjugation
機能・相同性
Type IV conjugative transfer system protein TraV / Type IV conjugative transfer system lipoprotein (TraV) / Type IV conjugative transfer system lipoprotein TraV
ジャーナル: Nat Commun / 年: 2021 タイトル: Architecture of the outer-membrane core complex from a conjugative type IV secretion system. 著者: Himani Amin / Aravindan Ilangovan / Tiago R D Costa / 要旨: Conjugation is one of the most important processes that bacteria utilize to spread antibiotic resistance genes among bacterial populations. Interbacterial DNA transfer requires a large double ...Conjugation is one of the most important processes that bacteria utilize to spread antibiotic resistance genes among bacterial populations. Interbacterial DNA transfer requires a large double membrane-spanning nanomachine called the type 4 secretion system (T4SS) made up of the inner-membrane complex (IMC), the outer-membrane core complex (OMCC) and the conjugative pilus. The iconic F plasmid-encoded T4SS has been central in understanding conjugation for several decades, however atomic details of its structure are not known. Here, we report the structure of a complete conjugative OMCC encoded by the pED208 plasmid from E. coli, solved by cryo-electron microscopy at 3.3 Å resolution. This 2.1 MDa complex has a unique arrangement with two radial concentric rings, each having a different symmetry eventually contributing to remarkable differences in protein stoichiometry and flexibility in comparison to other OMCCs. Our structure suggests that F-OMCC is a highly dynamic complex, with implications for pilus extension and retraction during conjugation.
A: TraB B: Type IV conjugative transfer system lipoprotein TraV C: TraB D: Type IV conjugative transfer system lipoprotein TraV E: TraB F: Type IV conjugative transfer system lipoprotein TraV G: TraB H: Type IV conjugative transfer system lipoprotein TraV I: TraB J: Type IV conjugative transfer system lipoprotein TraV K: TraB L: Type IV conjugative transfer system lipoprotein TraV M: TraB N: Type IV conjugative transfer system lipoprotein TraV O: TraB P: Type IV conjugative transfer system lipoprotein TraV Q: TraB R: Type IV conjugative transfer system lipoprotein TraV S: TraB T: Type IV conjugative transfer system lipoprotein TraV U: TraB V: Type IV conjugative transfer system lipoprotein TraV W: TraB X: Type IV conjugative transfer system lipoprotein TraV Y: TraB Z: Type IV conjugative transfer system lipoprotein TraV a: TraB b: Type IV conjugative transfer system lipoprotein TraV c: TraB d: Type IV conjugative transfer system lipoprotein TraV e: TraB f: Type IV conjugative transfer system lipoprotein TraV g: TraB h: Type IV conjugative transfer system lipoprotein TraV