5UVN

Structure of E. coli MCE protein PqiB, periplasmic domain

5UVN の概要

• エントリーDOI: 10.2210/pdb5uvn/pdb
• 関連するPDBエントリー: 5UW2 5UW8 5UWA
• EMDBエントリー: 8608 8611 8612
• 分子名称: Paraquat-inducible protein B (1 entity in total)
• 機能のキーワード: mce protein, bacterial lipid transport, transport protein
• 由来する生物種: Escherichia coli; 詳細
• タンパク質・核酸の鎖数: 6
• 化学式量合計: 293142.26

構造登録者

Bhabha, G.,Ekiert, D.C. (登録日: 2017-02-20, 公開日: 2017-04-12, 最終更新日: 2024-03-13)

主引用文献

Ekiert, D.C.,Bhabha, G.,Isom, G.L.,Greenan, G.,Ovchinnikov, S.,Henderson, I.R.,Cox, J.S.,Vale, R.D.
Architectures of Lipid Transport Systems for the Bacterial Outer Membrane.
Cell, 169:273-285.e17, 2017

PubMed Abstract: How phospholipids are trafficked between the bacterial inner and outer membranes through the hydrophilic space of the periplasm is not known. We report that members of the mammalian cell entry (MCE) protein family form hexameric assemblies with a central channel capable of mediating lipid transport. The E. coli MCE protein, MlaD, forms a ring associated with an ABC transporter complex in the inner membrane. A soluble lipid-binding protein, MlaC, ferries lipids between MlaD and an outer membrane protein complex. In contrast, EM structures of two other E. coli MCE proteins show that YebT forms an elongated tube consisting of seven stacked MCE rings, and PqiB adopts a syringe-like architecture. Both YebT and PqiB create channels of sufficient length to span the periplasmic space. This work reveals diverse architectures of highly conserved protein-based channels implicated in the transport of lipids between the membranes of bacteria and some eukaryotic organelles.

PubMed: 28388411
DOI: 10.1016/j.cell.2017.03.019

実験手法

ELECTRON MICROSCOPY (3.96 Å)