6ukg: Difference between revisions
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<StructureSection load='6ukg' size='340' side='right'caption='[[6ukg]], [[Resolution|resolution]] 1.16Å' scene=''> | <StructureSection load='6ukg' size='340' side='right'caption='[[6ukg]], [[Resolution|resolution]] 1.16Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[6ukg]] is a 3 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6UKG OCA]. For a <b>guided tour on the structure components</b> use [ | <table><tr><td colspan='2'>[[6ukg]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Haemophilus_parahaemolyticus Haemophilus parahaemolyticus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6UKG OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6UKG FirstGlance]. <br> | ||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr> | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.16Å</td></tr> | ||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</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=6ukg FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6ukg OCA], [https://pdbe.org/6ukg PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6ukg RCSB], [https://www.ebi.ac.uk/pdbsum/6ukg PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6ukg ProSAT]</span></td></tr> | |||
</table> | </table> | ||
== Function == | |||
[https://www.uniprot.org/uniprot/I3DBY6_HAEPH I3DBY6_HAEPH] | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
HhaI, a Type II restriction endonuclease, recognizes the symmetric sequence 5'-GCG downward arrowC-3' in duplex DNA and cleaves (' downward arrow') to produce fragments with 2-base, 3'-overhangs. We determined the structure of HhaI in complex with cognate DNA at an ultra-high atomic resolution of 1.0 A. Most restriction enzymes act as dimers with two catalytic sites, and cleave the two strands of duplex DNA simultaneously, in a single binding event. HhaI, in contrast, acts as a monomer with only one catalytic site, and cleaves the DNA strands sequentially, one after the other. HhaI comprises three domains, each consisting of a mixed five-stranded beta sheet with a defined function. The first domain contains the catalytic-site; the second contains residues for sequence recognition; and the third contributes to non-specific DNA binding. The active-site belongs to the 'PD-D/EXK' superfamily of nucleases and contains the motif SD-X11-EAK. The first two domains are similar in structure to two other monomeric restriction enzymes, HinP1I (G downward arrowCGC) and MspI (C downward arrowCGG), which produce fragments with 5'-overhangs. The third domain, present only in HhaI, shifts the positions of the recognition residues relative to the catalytic site enabling this enzyme to cleave the recognition sequence at a different position. The structure of M.HhaI, the biological methyltransferase partner of HhaI, was determined earlier. Together, these two structures represent the first natural pair of restriction-modification enzymes to be characterized in atomic detail. | |||
Structure of HhaI endonuclease with cognate DNA at an atomic resolution of 1.0 A.,Horton JR, Yang J, Zhang X, Petronzio T, Fomenkov A, Wilson GG, Roberts RJ, Cheng X Nucleic Acids Res. 2019 Dec 27. pii: 5687824. doi: 10.1093/nar/gkz1195. PMID:31879785<ref>PMID:31879785</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 6ukg" style="background-color:#fffaf0;"></div> | |||
==See Also== | |||
*[[Endonuclease 3D structures|Endonuclease 3D structures]] | |||
== References == | |||
<references/> | |||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: Haemophilus parahaemolyticus]] | |||
[[Category: Large Structures]] | [[Category: Large Structures]] | ||
[[Category: Cheng | [[Category: Cheng X]] | ||
[[Category: Horton | [[Category: Horton JR]] | ||