View source for 3czz


==Crystal structure of Cyanovirin-N domain B mutant==
<StructureSection load='3czz' size='340' side='right'caption='[[3czz]], [[Resolution|resolution]] 1.36&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3czz]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Nostoc_ellipsosporum Nostoc ellipsosporum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3CZZ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3CZZ 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]] 1.36&#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=3czz FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3czz OCA], [https://pdbe.org/3czz PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3czz RCSB], [https://www.ebi.ac.uk/pdbsum/3czz PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3czz ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/CVN_NOSEL CVN_NOSEL] Mannose-binding lectin.<ref>PMID:9210678</ref> <ref>PMID:12678493</ref> 
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/cz/3czz_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=3czz ConSurf].
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== Publication Abstract from PubMed ==
The cyanobacterial lectin Cyanovirin-N (CV-N) exhibits antiviral activity against HIV at a low nanomolar concentration by interacting with high-mannose oligosaccharides on the virus surface envelope glycoprotein gp120. Atomic structures of wild-type CV-N revealed a monomer in solution and a domain-swapped dimer in the crystal, with the monomer comprising two independent carbohydrate binding sites that individually bind with micromolar affinity to di- and trimannoses. In the mutant CVN(mutDB), the binding site on domain B was abolished and the protein was found to be completely inactive against HIV. We determined the solution NMR and crystal structures of this variant and characterized its sugar binding properties. In solution and the crystal, CVN(mutDB) is a monomer and no domain-swapping was observed. The protein binds to Man-3 and Man-9 with similar dissociation constants ( approximately 4 muM). This confirms that the nanomolar activity of wild-type CV-N is related to the multisite nature of the protein carbohydrate interaction.

Solution and crystal structures of a sugar binding site mutant of cyanovirin-N: no evidence of domain swapping.,Matei E, Furey W, Gronenborn AM Structure. 2008 Aug 6;16(8):1183-94. PMID:18682220<ref>PMID:18682220</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 3czz" style="background-color:#fffaf0;"></div>
== References ==
<references/>
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</StructureSection>
[[Category: Large Structures]]
[[Category: Nostoc ellipsosporum]]
[[Category: Furey W]]
[[Category: Gronenborn AM]]
[[Category: Matei E]]