View source for 5i82


==First Crystal Structure of E.coli Based Recombinant Diphtheria Toxin Mutant CRM197==
<StructureSection load='5i82' size='340' side='right'caption='[[5i82]], [[Resolution|resolution]] 2.35&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[5i82]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Corynebacterium_diphtheriae Corynebacterium diphtheriae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5I82 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5I82 FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.35&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</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=5i82 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5i82 OCA], [https://pdbe.org/5i82 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5i82 RCSB], [https://www.ebi.ac.uk/pdbsum/5i82 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5i82 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/Q6NK15_CORDI Q6NK15_CORDI] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
It is established that the immunogenicity of polysaccharides is enhanced by coupling them to carrier proteins. Cross reacting material (CRM(197)), a nontoxic variant of diphtheria toxin (DT) is widely used carrier protein for polysaccharide conjugate vaccines. Conventionally, CRM(197) is isolated by fermentation of Corynebacterium diphtheriae C7 (beta(197)) cultures, which often suffers from low yield. Recently, several recombinant approaches have been reported with robust processes and higher yields, which will improve the affordability of CRM(197)-based vaccines. Vaccine manufacturers require detailed analytical information to ensure that the CRM(197) meets quality standards and regulatory requirements. In the present manuscript we have described detailed structural characteristics of Escherichia coli based recombinant CRM(197) (rCRM(197)) carrier protein. The crystal structure of the E. coli based rCRM(197) was found to be identical with the reported crystal structure of the C7 CRM(197) produced in C. diphtheriae C7 strain (Protein Data Bank (PDB) ID: 4EA0)(.) The crystal structure of rCRM(197) was determined at 2.3 A resolution and structure was submitted to the PDB with accession number ID 5I82. This is the first report of a crystal structure of E. coli derived recombinant CRM(197) carrier protein. Furthermore, the rCRM(197) was conjugated to Vi polysaccharide to generate Typhoid conjugate vaccine (Vi-rCRM(197)) and its immunogenicity was evaluated in Balb/C Mice. The Vi-rCRM(197) conjugate vaccine was found to generate strong primary alpha-Vi antibody response and also showed a booster response after subsequent vaccination in mice. Overall data suggest that E. coli based recombinant CRM(197) exhibits structural and immunological similarity with the C7 CRM(197) and can be used as a carrier protein in conjugate vaccine development.

Structural and immunological characterization of E. coli derived recombinant CRM(197) protein used as carrier in conjugate vaccines.,Mishra RPN, Yadav RSP, Jones C, Nocadello S, Minasov G, Shuvalova LA, Anderson WF, Goel A Biosci Rep. 2018 Sep 25;38(5):BSR20180238. doi: 10.1042/BSR20180238. Print 2018 , Oct 31. PMID:29875175<ref>PMID:29875175</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 5i82" style="background-color:#fffaf0;"></div>

==See Also==
*[[Diphtheria toxin|Diphtheria toxin]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Corynebacterium diphtheriae]]
[[Category: Large Structures]]
[[Category: Anderson WF]]
[[Category: Dubrovska I]]
[[Category: Goel A]]
[[Category: Minasov G]]
[[Category: Mishra RPN]]
[[Category: Shuvalova L]]