4unc: Difference between revisions
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<StructureSection load='4unc' size='340' side='right'caption='[[4unc]], [[Resolution|resolution]] 2.30Å' scene=''> | <StructureSection load='4unc' size='340' side='right'caption='[[4unc]], [[Resolution|resolution]] 2.30Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[4unc]] is a 15 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4UNC OCA]. For a <b>guided tour on the structure components</b> use [ | <table><tr><td colspan='2'>[[4unc]] is a 15 chain structure with sequence from [https://en.wikipedia.org/wiki/Desulfurococcus_mucosus Desulfurococcus mucosus] and [https://en.wikipedia.org/wiki/Synthetic_construct Synthetic construct]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4UNC OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4UNC FirstGlance]. <br> | ||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene> | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</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=4unc FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4unc OCA], [https://pdbe.org/4unc PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4unc RCSB], [https://www.ebi.ac.uk/pdbsum/4unc PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4unc ProSAT]</span></td></tr> | |||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | |||
</table> | </table> | ||
== Function == | == Function == | ||
[ | [https://www.uniprot.org/uniprot/DMO1_DESMO DMO1_DESMO] Endonuclease involved in intron homing. Recognizes a recognizes up to 20 bp of DNA in the 23S rRNA gene intron. It has a slow turnover rate and cuts the coding strand with a slight preference over the non-coding strand. | ||
<div style="background-color:#fffaf0;"> | <div style="background-color:#fffaf0;"> | ||
== Publication Abstract from PubMed == | == Publication Abstract from PubMed == | ||
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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: Desulfurococcus mucosus]] | |||
[[Category: Large Structures]] | [[Category: Large Structures]] | ||
[[Category: Gomez | [[Category: Synthetic construct]] | ||
[[Category: Marcaida | [[Category: Gomez H]] | ||
[[Category: Molina | [[Category: Marcaida MJ]] | ||
[[Category: Montoya | [[Category: Molina R]] | ||
[[Category: Orozco | [[Category: Montoya G]] | ||
[[Category: Prieto | [[Category: Orozco M]] | ||
[[Category: Redondo | [[Category: Prieto J]] | ||
[[Category: Stella | [[Category: Redondo P]] | ||
[[Category: Stella S]] | |||
Revision as of 10:25, 29 March 2023
THE CRYSTAL STRUCTURE OF I-DMOI IN COMPLEX WITH ITS TARGET DNA AT 8 DAYS INCUBATION IN 5MM MN (STATE 6)THE CRYSTAL STRUCTURE OF I-DMOI IN COMPLEX WITH ITS TARGET DNA AT 8 DAYS INCUBATION IN 5MM MN (STATE 6)
Structural highlights
FunctionDMO1_DESMO Endonuclease involved in intron homing. Recognizes a recognizes up to 20 bp of DNA in the 23S rRNA gene intron. It has a slow turnover rate and cuts the coding strand with a slight preference over the non-coding strand. Publication Abstract from PubMedThe enzymatic hydrolysis of DNA phosphodiester bonds has been widely studied, but the chemical reaction has not yet been observed. Here we follow the generation of a DNA double-strand break (DSB) by the Desulfurococcus mobilis homing endonuclease I-DmoI, trapping sequential stages of a two-metal-ion cleavage mechanism. We captured intermediates of the different catalytic steps, and this allowed us to watch the reaction by 'freezing' multiple states. We observed the successive entry of two metals involved in the reaction and the arrival of a third cation in a central position of the active site. This third metal ion has a crucial role, triggering the consecutive hydrolysis of the targeted phosphodiester bonds in the DNA strands and leaving its position once the DSB is generated. The multiple structures show the orchestrated conformational changes in the protein residues, nucleotides and metals during catalysis. Visualizing phosphodiester-bond hydrolysis by an endonuclease.,Molina R, Stella S, Redondo P, Gomez H, Marcaida MJ, Orozco M, Prieto J, Montoya G Nat Struct Mol Biol. 2014 Dec 8. doi: 10.1038/nsmb.2932. PMID:25486305[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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