4ZOW

Crystal structure of E. coli multidrug transporter MdfA in complex with chloramphenicol

4ZOW の概要

• エントリーDOI: 10.2210/pdb4zow/pdb
• 関連するPDBエントリー: 4ZP0 4ZP2
• 分子名称: Multidrug transporter MdfA, CHLORAMPHENICOL (3 entities in total)
• 機能のキーワード: mfs family, multi-drug antiporter, mdfa, cm, transport protein
• 由来する生物種: Escherichia coli (strain K12)
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 42713.67

構造登録者

Zhang, X.C.,Heng, J.,Zhao, Y.,Wang, X. (登録日: 2015-05-07, 公開日: 2015-08-19, 最終更新日: 2024-03-20)

主引用文献

Heng, J.,Zhao, Y.,Liu, M.,Liu, Y.,Fan, J.,Wang, X.,Zhao, Y.,Zhang, X.C.
Substrate-bound structure of the E. coli multidrug resistance transporter MdfA
Cell Res., 25:1060-1073, 2015

PubMed Abstract: Multidrug resistance is a serious threat to public health. Proton motive force-driven antiporters from the major facilitator superfamily (MFS) constitute a major group of multidrug-resistance transporters. Currently, no reports on crystal structures of MFS antiporters in complex with their substrates exist. The E. coli MdfA transporter is a well-studied model system for biochemical analyses of multidrug-resistance MFS antiporters. Here, we report three crystal structures of MdfA-ligand complexes at resolutions up to 2.0 Å, all in the inward-facing conformation. The substrate-binding site sits proximal to the conserved acidic residue, D34. Our mutagenesis studies support the structural observations of the substrate-binding mode and the notion that D34 responds to substrate binding by adjusting its protonation status. Taken together, our data unveil the substrate-binding mode of MFS antiporters and suggest a mechanism of transport via this group of transporters.

PubMed: 26238402
DOI: 10.1038/cr.2015.94

実験手法

X-RAY DIFFRACTION (2.45 Å)