View source for 7zdw


==IF(heme/confined) conformation of CydDC mutant (E500Q.C) in AMP-PNP(CydD) bound state (Dataset-22)==
<StructureSection load='7zdw' size='340' side='right'caption='[[7zdw]], [[Resolution|resolution]] 3.35&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[7zdw]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli_K-12 Escherichia coli K-12]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7ZDW OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7ZDW 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]] 3.35&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ANP:PHOSPHOAMINOPHOSPHONIC+ACID-ADENYLATE+ESTER'>ANP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></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=7zdw FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7zdw OCA], [https://pdbe.org/7zdw PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7zdw RCSB], [https://www.ebi.ac.uk/pdbsum/7zdw PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7zdw ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/CYDD_ECOLI CYDD_ECOLI] Part of the ABC transporter complex CydDC that exports the reduced low-molecular-weight thiols cysteine and glutathione to the periplasm (PubMed:12393891, PubMed:16040611). Export of these thiol-containing redox-active molecules may be crucial for redox homeostasis in the periplasm, permitting correct assembly of various respiratory complexes and formation of correct disulfide bonds in periplasmic and secreted proteins (Probable). CydD contains transmembrane domains (TMD), which form a pore in the inner membrane, and an ATP-binding domain (NBD), which is responsible for energy generation (PubMed:24958725). Required for the assembly of functional cytochrome bd-type quinol oxidases and periplasmic c-type cytochromes (PubMed:15470119, PubMed:7934832, PubMed:8181727). Overexpression of CydDC under anaerobic conditions also results in the formation of a heme biosynthesis-derived pigment, P-574 (PubMed:12375104). CydDC binds heme b, but heme is probably not transported by the complex and instead has a role in regulating ATPase activity (PubMed:24958725).<ref>PMID:12375104</ref> <ref>PMID:12393891</ref> <ref>PMID:15470119</ref> <ref>PMID:16040611</ref> <ref>PMID:24958725</ref> <ref>PMID:7934832</ref> <ref>PMID:8181727</ref> <ref>PMID:12393891</ref> <ref>PMID:16040611</ref> <ref>PMID:31279084</ref>   Conversely, a more recent study suggests an alternative function of CydDC: authors suggest that CydDC does not mediate the export of L-cysteine but rather reduces cytoplasmic L-cystine to L-cysteine (PubMed:32900959). The principle function of CydDC would be to maintain the reduced state of cytoplasmic L-cysteine, thereby providing an important connection between sulfur metabolism, oxidative stress and resistance to antibiotics (PubMed:32900959).<ref>PMID:32900959</ref> 
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Escherichia coli K-12]]
[[Category: Large Structures]]
[[Category: Safarian S]]
[[Category: Wu D]]