+検索条件
-Structure paper
タイトル | Structures of Atm1 provide insight into [2Fe-2S] cluster export from mitochondria. |
---|---|
ジャーナル・号・ページ | Nat Commun, Vol. 13, Issue 1, Page 4339, Year 2022 |
掲載日 | 2022年7月27日 |
著者 | Ping Li / Amber L Hendricks / Yong Wang / Rhiza Lyne E Villones / Karin Lindkvist-Petersson / Gabriele Meloni / J A Cowan / Kaituo Wang / Pontus Gourdon / |
PubMed 要旨 | In eukaryotes, iron-sulfur clusters are essential cofactors for numerous physiological processes, but these clusters are primarily biosynthesized in mitochondria. Previous studies suggest ...In eukaryotes, iron-sulfur clusters are essential cofactors for numerous physiological processes, but these clusters are primarily biosynthesized in mitochondria. Previous studies suggest mitochondrial ABCB7-type exporters are involved in maturation of cytosolic iron-sulfur proteins. However, the molecular mechanism for how the ABCB7-type exporters participate in this process remains elusive. Here, we report a series of cryo-electron microscopy structures of a eukaryotic homolog of human ABCB7, CtAtm1, determined at average resolutions ranging from 2.8 to 3.2 Å, complemented by functional characterization and molecular docking in silico. We propose that CtAtm1 accepts delivery from glutathione-complexed iron-sulfur clusters. A partially occluded state links cargo-binding to residues at the mitochondrial matrix interface that line a positively charged cavity, while the binding region becomes internalized and is partially divided in an early occluded state. Collectively, our findings substantially increase the understanding of the transport mechanism of eukaryotic ABCB7-type proteins. |
リンク | Nat Commun / PubMed:35896548 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 2.81 - 3.2 Å |
構造データ | EMDB-13606, PDB-7pqx: EMDB-13607, PDB-7pr1: EMDB-13609, PDB-7pro: EMDB-13610, PDB-7pru: EMDB-13612, PDB-7psd: |
化合物 | ChemComp-ATP: ChemComp-MG: ChemComp-GSH: |
由来 |
|
キーワード | MEMBRANE PROTEIN / ABC exporter / transporter |