View source for 7ajq


==cryo-EM structure of ExbBD from Serratia Marcescens==
<StructureSection load='7ajq' size='340' side='right'caption='[[7ajq]], [[Resolution|resolution]] 4.00&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[7ajq]] is a 7 chain structure with sequence from [https://en.wikipedia.org/wiki/Serratia_marcescens Serratia marcescens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7AJQ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7AJQ 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]] 4&#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=7ajq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7ajq OCA], [https://pdbe.org/7ajq PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7ajq RCSB], [https://www.ebi.ac.uk/pdbsum/7ajq PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7ajq ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/V5YUQ0_SERMA V5YUQ0_SERMA] Involved in the TonB-dependent energy-dependent transport of various receptor-bound substrates.[ARBA:ARBA00003540]
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
ExbB and ExbD are cytoplasmic membrane proteins that associate with TonB to convey the energy of the proton-motive force to outer membrane receptors in Gram-negative bacteria for iron uptake. The opportunistic pathogen Serratia marcescens (Sm) possesses both TonB and a heme-specific TonB paralog, HasB. ExbBSm has a long periplasmic extension absent in other bacteria such as E. coli (Ec). Long ExbB's are found in several genera of Alphaproteobacteria, most often in correlation with a hasB gene. We investigated specificity determinants of ExbBSm and HasB. We determined the cryo-EM structures of ExbBSm and of the ExbB-ExbDSm complex from S. marcescens. ExbBSm alone is a stable pentamer, and its complex includes two ExbD monomers. We showed that ExbBSm extension interacts with HasB and is involved in heme acquisition and we identified key residues in the membrane domain of ExbBSm and ExbBEc, essential for function and likely involved in the interaction with TonB/HasB. Our results shed light on the class of inner membrane energy machinery formed by ExbB, ExbD and HasB.

Structural and molecular determinants for the interaction of ExbB from Serratia marcescens and HasB, a TonB paralog.,Biou V, Adaixo RJD, Chami M, Coureux PD, Laurent B, Enguene VYN, de Amorim GC, Izadi-Pruneyre N, Malosse C, Chamot-Rooke J, Stahlberg H, Delepelaire P Commun Biol. 2022 Apr 13;5(1):355. doi: 10.1038/s42003-022-03306-y. PMID:35418619<ref>PMID:35418619</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 7ajq" style="background-color:#fffaf0;"></div>

==See Also==
*[[ExbB|ExbB]]
*[[ExbD|ExbD]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Serratia marcescens]]
[[Category: Adaixo R]]
[[Category: Biou V]]
[[Category: Chami M]]
[[Category: Coureux PD]]
[[Category: Delepelaire P]]