View source for 3t2w


==Crystal structure of shwanavidin (F43A) - biotin complex==
<StructureSection load='3t2w' size='340' side='right'caption='[[3t2w]], [[Resolution|resolution]] 1.50&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3t2w]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Shewanella_denitrificans_OS217 Shewanella denitrificans OS217]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3T2W OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3T2W 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]] 1.5&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BTN:BIOTIN'>BTN</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=3t2w FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3t2w OCA], [https://pdbe.org/3t2w PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3t2w RCSB], [https://www.ebi.ac.uk/pdbsum/3t2w PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3t2w ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/Q12QS6_SHEDO Q12QS6_SHEDO] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Shwanavidin is an avidin-like protein from the marine proteobactrium Shewanella denitrificans, which exhibits an innate dimeric structure while maintaining high affinity towards biotin. A unique residue (Phe-43) from the L3,4 loop and a distinctive disulfide bridge were shown to account for the high affinity towards biotin. Phe-43 emulates the function and position of the critical intermonomeric Trp that characterizes the tetrameric avidins but is lacking in shwanavidin. The 18 copies of the apo monomer revealed distinctive snapshots of L3,4 and Phe-43, providing rare insight into loop flexibility, binding-site accessibility and psychrophilic adaptation. Nevertheless, as in all avidins, shwanavidin also displays high thermostability properties. The unique features of shwanavidin may provide a platform for the design of a long-sought-after monovalent form of avidin, which would be ideal for novel types of biotechnological application.

Structural Adaptation of a Thermostable Biotin-Binding Protein in a Psychrophilic Environment.,Meir A, Bayer EA, Livnah O J Biol Chem. 2012 Apr 5. PMID:22493427<ref>PMID:22493427</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 3t2w" style="background-color:#fffaf0;"></div>

==See Also==
*[[Avidin 3D structures|Avidin 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Shewanella denitrificans OS217]]
[[Category: Livnah O]]
[[Category: Meir A]]