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-Structure paper
タイトル | Structure and efflux mechanism of the yeast pleiotropic drug resistance transporter Pdr5. |
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ジャーナル・号・ページ | Nat Commun, Vol. 12, Issue 1, Page 5254, Year 2021 |
掲載日 | 2021年9月6日 |
著者 | Andrzej Harris / Manuel Wagner / Dijun Du / Stefanie Raschka / Lea-Marie Nentwig / Holger Gohlke / Sander H J Smits / Ben F Luisi / Lutz Schmitt / |
PubMed 要旨 | Pdr5, a member of the extensive ABC transporter superfamily, is representative of a clinically relevant subgroup involved in pleiotropic drug resistance. Pdr5 and its homologues drive drug efflux ...Pdr5, a member of the extensive ABC transporter superfamily, is representative of a clinically relevant subgroup involved in pleiotropic drug resistance. Pdr5 and its homologues drive drug efflux through uncoupled hydrolysis of nucleotides, enabling organisms such as baker's yeast and pathogenic fungi to survive in the presence of chemically diverse antifungal agents. Here, we present the molecular structure of Pdr5 solved with single particle cryo-EM, revealing details of an ATP-driven conformational cycle, which mechanically drives drug translocation through an amphipathic channel, and a clamping switch within a conserved linker loop that acts as a nucleotide sensor. One half of the transporter remains nearly invariant throughout the cycle, while its partner undergoes changes that are transmitted across inter-domain interfaces to support a peristaltic motion of the pumped molecule. The efflux model proposed here rationalises the pleiotropic impact of Pdr5 and opens new avenues for the development of effective antifungal compounds. |
リンク | Nat Commun / PubMed:34489436 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 2.85 - 3.77 Å |
構造データ | EMDB-13142, PDB-7p03: EMDB-13143, PDB-7p04: EMDB-13144, PDB-7p05: EMDB-13145, PDB-7p06: |
化合物 | ChemComp-ATP: ChemComp-ADP: ChemComp-RHQ: ChemComp-MG: ChemComp-AOV: |
由来 |
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キーワード | TRANSPORT PROTEIN / ABC transporter / antibiotic resistance / membrane protein / fungal infection |