5mdr: Difference between revisions
Jump to navigation
Jump to search
No edit summary |
No edit summary |
||
| Line 1: | Line 1: | ||
==Crystal structure of in vitro folded Chitoporin VhChip from Vibrio harveyi in complex with chitohexaose== | ==Crystal structure of in vitro folded Chitoporin VhChip from Vibrio harveyi in complex with chitohexaose== | ||
<StructureSection load='5mdr' size='340' side='right' caption='[[5mdr]], [[Resolution|resolution]] 1.90Å' scene=''> | <StructureSection load='5mdr' size='340' side='right'caption='[[5mdr]], [[Resolution|resolution]] 1.90Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[5mdr]] is a 6 chain structure with sequence from [ | <table><tr><td colspan='2'>[[5mdr]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Vibrio_harveyi Vibrio harveyi]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5MDR OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5MDR FirstGlance]. <br> | ||
</td></tr><tr id=' | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.9Å</td></tr> | ||
<tr id=' | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=C8E:(HYDROXYETHYLOXY)TRI(ETHYLOXY)OCTANE'>C8E</scene>, <scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</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=5mdr FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5mdr OCA], [https://pdbe.org/5mdr PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5mdr RCSB], [https://www.ebi.ac.uk/pdbsum/5mdr PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5mdr ProSAT]</span></td></tr> | ||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | |||
</table> | </table> | ||
== Function == | |||
[https://www.uniprot.org/uniprot/L0RVU0_VIBHA L0RVU0_VIBHA] | |||
<div style="background-color:#fffaf0;"> | <div style="background-color:#fffaf0;"> | ||
== Publication Abstract from PubMed == | == Publication Abstract from PubMed == | ||
| Line 18: | Line 19: | ||
</div> | </div> | ||
<div class="pdbe-citations 5mdr" style="background-color:#fffaf0;"></div> | <div class="pdbe-citations 5mdr" style="background-color:#fffaf0;"></div> | ||
==See Also== | |||
*[[Porin 3D structures|Porin 3D structures]] | |||
== References == | == References == | ||
<references/> | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: | [[Category: Large Structures]] | ||
[[Category: | [[Category: Vibrio harveyi]] | ||
[[Category: Zahn | [[Category: Zahn M]] | ||
[[Category: | [[Category: Van den Berg B]] | ||
Latest revision as of 21:40, 1 November 2023
Crystal structure of in vitro folded Chitoporin VhChip from Vibrio harveyi in complex with chitohexaoseCrystal structure of in vitro folded Chitoporin VhChip from Vibrio harveyi in complex with chitohexaose
Structural highlights
FunctionPublication Abstract from PubMedChitin, an insoluble polymer of N-acetylglucosamine, is one of the most abundant biopolymers on Earth. By degrading chitin, chitinolytic bacteria such as Vibrio harveyi are critical for chitin recycling and maintenance of carbon and nitrogen cycles in the world's oceans. A decisive step in chitin degradation is the uptake of chito-oligosaccharides by an outer membrane protein channel named chitoporin (ChiP). Here, we report X-ray crystal structures of ChiP from V. harveyi in the presence and absence of chito-oligosaccharides. Structures without bound sugar reveal a trimeric assembly with an unprecedented closing of the transport pore by the N-terminus of a neighboring subunit. Substrate binding ejects the pore plug to open the transport channel. Together with molecular dynamics simulations, electrophysiology and in vitro transport assays our data provide an explanation for the exceptional affinity of ChiP for chito-oligosaccharides and point to an important role of the N-terminal gate in substrate transport. Structural basis for chitin acquisition by marine Vibrio species.,Aunkham A, Zahn M, Kesireddy A, Pothula KR, Schulte A, Basle A, Kleinekathofer U, Suginta W, van den Berg B Nat Commun. 2018 Jan 15;9(1):220. doi: 10.1038/s41467-017-02523-y. PMID:29335469[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
|
| ||||||||||||||||||