View source for 3bvq


==Crystal Structure of Apo NotI Restriction Endonuclease==
<StructureSection load='3bvq' size='340' side='right'caption='[[3bvq]], [[Resolution|resolution]] 2.80&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3bvq]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Nocardia_otitidiscaviarum Nocardia otitidiscaviarum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3BVQ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3BVQ 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]] 2.8&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=FE:FE+(III)+ION'>FE</scene>, <scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</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=3bvq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3bvq OCA], [https://pdbe.org/3bvq PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3bvq RCSB], [https://www.ebi.ac.uk/pdbsum/3bvq PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3bvq ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/Q2I6W2_9NOCA Q2I6W2_9NOCA] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The structure of the rare-cutting restriction endonuclease NotI, which recognizes the 8 bp target 5'-GCGGCCGC-3', has been solved with and without bound DNA. Because of its specificity (recognizing a site that occurs once per 65 kb), NotI is used to generate large genomic fragments and to map DNA methylation status. NotI contains a unique metal binding fold, found in a variety of putative endonucleases, occupied by an iron atom coordinated within a tetrahedral Cys4 motif. This domain positions nearby protein elements for DNA recognition, and serves a structural role. While recognition of the central six base pairs of the target is accomplished via a saturated hydrogen bond network typical of restriction enzymes, the most peripheral base pairs are engaged in a single direct contact in the major groove, reflecting reduced pressure to recognize those positions. NotI may represent an evolutionary intermediate between mobile endonucleases (which recognize longer target sites) and canonical restriction endonucleases.

Structures of the Rare-Cutting Restriction Endonuclease NotI Reveal a Unique Metal Binding Fold Involved in DNA Binding.,Lambert AR, Sussman D, Shen B, Maunus R, Nix J, Samuelson J, Xu SY, Stoddard BL Structure. 2008 Apr;16(4):558-69. PMID:18400177<ref>PMID:18400177</ref>

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

==See Also==
*[[Endonuclease 3D structures|Endonuclease 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Nocardia otitidiscaviarum]]
[[Category: Lambert AR]]
[[Category: Shen B]]
[[Category: Stoddard BL]]
[[Category: Sussman D]]