3ko2: Difference between revisions
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==I-MsoI re-designed for altered DNA cleavage specificity (-7C)== | ==I-MsoI re-designed for altered DNA cleavage specificity (-7C)== | ||
<StructureSection load='3ko2' size='340' side='right' caption='[[3ko2]], [[Resolution|resolution]] 2.90Å' scene=''> | <StructureSection load='3ko2' size='340' side='right'caption='[[3ko2]], [[Resolution|resolution]] 2.90Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[3ko2]] is a 8 chain structure with sequence from [ | <table><tr><td colspan='2'>[[3ko2]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/Monsk Monsk]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3KO2 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3KO2 FirstGlance]. <br> | ||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene></td></tr> | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene></td></tr> | ||
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">I-MsoI, orf170 ([ | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">I-MsoI, orf170 ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=141716 MONSK])</td></tr> | ||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=3ko2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3ko2 OCA], [https://pdbe.org/3ko2 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3ko2 RCSB], [https://www.ebi.ac.uk/pdbsum/3ko2 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3ko2 ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
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==See Also== | ==See Also== | ||
*[[Endonuclease|Endonuclease]] | *[[Endonuclease 3D structures|Endonuclease 3D structures]] | ||
== References == | == References == | ||
<references/> | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: Large Structures]] | |||
[[Category: Monsk]] | [[Category: Monsk]] | ||
[[Category: Stoddard, B L]] | [[Category: Stoddard, B L]] | ||
Revision as of 15:27, 13 October 2021
I-MsoI re-designed for altered DNA cleavage specificity (-7C)I-MsoI re-designed for altered DNA cleavage specificity (-7C)
Structural highlights
Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedSite-specific homing endonucleases are capable of inducing gene conversion via homologous recombination. Reprogramming their cleavage specificities allows the targeting of specific biological sites for gene correction or conversion. We used computational protein design to alter the cleavage specificity of I-MsoI for three contiguous base pair substitutions, resulting in an endonuclease whose activity and specificity for its new site rival that of wild-type I-MsoI for the original site. Concerted design for all simultaneous substitutions was more successful than a modular approach against individual substitutions, highlighting the importance of context-dependent redesign and optimization of protein-DNA interactions. We then used computational design based on the crystal structure of the designed complex, which revealed significant unanticipated shifts in DNA conformation, to create an endonuclease that specifically cleaves a site with four contiguous base pair substitutions. Our results demonstrate that specificity switches for multiple concerted base pair substitutions can be computationally designed, and that iteration between design and structure determination provides a route to large scale reprogramming of specificity. Computational reprogramming of homing endonuclease specificity at multiple adjacent base pairs.,Ashworth J, Taylor GK, Havranek JJ, Quadri SA, Stoddard BL, Baker D Nucleic Acids Res. 2010 Apr 30. PMID:20435674[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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