View source for 7pqx


==Structure of CtAtm1 in the inward-facing open conformation==
<StructureSection load='7pqx' size='340' side='right'caption='[[7pqx]], [[Resolution|resolution]] 3.08&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[7pqx]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Chaetomium_thermophilum_var._thermophilum_DSM_1495 Chaetomium thermophilum var. thermophilum DSM 1495]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7PQX OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7PQX FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 3.08&#8491;</td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=7pqx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7pqx OCA], [https://pdbe.org/7pqx PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7pqx RCSB], [https://www.ebi.ac.uk/pdbsum/7pqx PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7pqx ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/G0SBE6_CHATD G0SBE6_CHATD] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
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 A, 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.

Structures of Atm1 provide insight into [2Fe-2S] cluster export from mitochondria.,Li P, Hendricks AL, Wang Y, Villones RLE, Lindkvist-Petersson K, Meloni G, Cowan JA, Wang K, Gourdon P Nat Commun. 2022 Jul 27;13(1):4339. doi: 10.1038/s41467-022-32006-8. PMID:35896548<ref>PMID:35896548</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 7pqx" style="background-color:#fffaf0;"></div>
== References ==
<references/>
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</StructureSection>
[[Category: Chaetomium thermophilum var. thermophilum DSM 1495]]
[[Category: Large Structures]]
[[Category: Gourdon PE]]
[[Category: Li P]]
[[Category: Wang KT]]