View source for 4irm


==Crystal structure of mntc r116a mutant exhibits flexibility in the c-terminal domain==
<StructureSection load='4irm' size='340' side='right'caption='[[4irm]], [[Resolution|resolution]] 3.50&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4irm]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Synechocystis_sp._PCC_6803 Synechocystis sp. PCC 6803]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=3v63 3v63]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4IRM OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4IRM 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]] 3.5&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</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=4irm FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4irm OCA], [https://pdbe.org/4irm PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4irm RCSB], [https://www.ebi.ac.uk/pdbsum/4irm PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4irm ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/Q79EF9_SYNY3 Q79EF9_SYNY3] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The cyanobacterium Synechocystis sp. PCC 6803 imports Mn2+ ions via MntCAB, an ABC transport system that is expressed at submicromolar Mn2+ concentrations. The structures of the wild type (WT) and a site-directed mutant of the MntC solute-binding protein have been determined at 2.7 and 3.5 A resolution, respectively. The WT structure is significantly improved over the previously determined structure (PDB entry 1xvl), showing improved Mn2+ binding site parameters, disulfide bonds in all three monomers and ions bound to the protein surface, revealing the role of Zn2+ ions in the crystallization liquor. The structure of MntC reveals that the active site is surrounded by neutral-to-positive electrostatic potential and is dominated by a network of polar interactions centred around Arg116. The mutation of this residue to alanine was shown to destabilize loops in the entrance to the metal-ion binding site and suggests a possible role in MntC function.

Arginine 116 stabilizes the entrance to the metal ion-binding site of the MntC protein.,Kanteev M, Adir N Acta Crystallogr Sect F Struct Biol Cryst Commun. 2013 Mar 1;69(Pt 3):237-42., doi: 10.1107/S174430911300153X. Epub 2013 Feb 22. PMID:23519795<ref>PMID:23519795</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 4irm" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Synechocystis sp. PCC 6803]]
[[Category: Adir N]]
[[Category: Kanteev M]]