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==Crystal structure of T. thermophilus Argonaute N478 mutant protein complexed with DNA guide strand and 19-nt RNA target strand== | ==Crystal structure of T. thermophilus Argonaute N478 mutant protein complexed with DNA guide strand and 19-nt RNA target strand== | ||
<StructureSection load='3hk2' size='340' side='right' caption='[[3hk2]], [[Resolution|resolution]] 2.80Å' scene=''> | <StructureSection load='3hk2' size='340' side='right'caption='[[3hk2]], [[Resolution|resolution]] 2.80Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[3hk2]] is a 6 chain structure with sequence from [ | <table><tr><td colspan='2'>[[3hk2]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Thermus_thermophilus_HB27 Thermus thermophilus HB27]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3HK2 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3HK2 FirstGlance]. <br> | ||
</td></tr><tr id=' | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.8Å</td></tr> | ||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr> | |||
<tr id=' | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=3hk2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3hk2 OCA], [https://pdbe.org/3hk2 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3hk2 RCSB], [https://www.ebi.ac.uk/pdbsum/3hk2 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3hk2 ProSAT]</span></td></tr> | ||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | |||
</table> | </table> | ||
== Function == | |||
[https://www.uniprot.org/uniprot/Q746M7_THET2 Q746M7_THET2] | |||
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
[[Image:Consurf_key_small.gif|200px|right]] | [[Image:Consurf_key_small.gif|200px|right]] | ||
Check<jmol> | Check<jmol> | ||
<jmolCheckbox> | <jmolCheckbox> | ||
<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/hk/3hk2_consurf.spt"</scriptWhenChecked> | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/hk/3hk2_consurf.spt"</scriptWhenChecked> | ||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | ||
<text>to colour the structure by Evolutionary Conservation</text> | <text>to colour the structure by Evolutionary Conservation</text> | ||
</jmolCheckbox> | </jmolCheckbox> | ||
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/ | </jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=3hk2 ConSurf]. | ||
<div style="clear:both"></div> | <div style="clear:both"></div> | ||
<div style="background-color:#fffaf0;"> | <div style="background-color:#fffaf0;"> | ||
| Line 26: | Line 28: | ||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
</div> | </div> | ||
<div class="pdbe-citations 3hk2" style="background-color:#fffaf0;"></div> | |||
==See Also== | ==See Also== | ||
*[[Argonaute|Argonaute]] | *[[Argonaute 3D structures|Argonaute 3D structures]] | ||
== References == | == References == | ||
<references/> | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: Thermus thermophilus]] | [[Category: Large Structures]] | ||
[[Category: Li | [[Category: Thermus thermophilus HB27]] | ||
[[Category: Patel | [[Category: Li H]] | ||
[[Category: Sheng | [[Category: Patel DJ]] | ||
[[Category: Wang | [[Category: Sheng G]] | ||
[[Category: Wang Y]] | |||
Latest revision as of 10:23, 6 September 2023
Crystal structure of T. thermophilus Argonaute N478 mutant protein complexed with DNA guide strand and 19-nt RNA target strandCrystal structure of T. thermophilus Argonaute N478 mutant protein complexed with DNA guide strand and 19-nt RNA target strand
Structural highlights
FunctionEvolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedThe slicer activity of the RNA-induced silencing complex resides within its Argonaute (Ago) component, in which the PIWI domain provides the catalytic residues governing guide-strand mediated site-specific cleavage of target RNA. Here we report on structures of ternary complexes of Thermus thermophilus Ago catalytic mutants with 5'-phosphorylated 21-nucleotide guide DNA and complementary target RNAs of 12, 15 and 19 nucleotides in length, which define the molecular basis for Mg(2+)-facilitated site-specific cleavage of the target. We observe pivot-like domain movements within the Ago scaffold on proceeding from nucleation to propagation steps of guide-target duplex formation, with duplex zippering beyond one turn of the helix requiring the release of the 3'-end of the guide from the PAZ pocket. Cleavage assays on targets of various lengths supported this model, and sugar-phosphate-backbone-modified target strands showed the importance of structural and catalytic divalent metal ions observed in the crystal structures. Nucleation, propagation and cleavage of target RNAs in Ago silencing complexes.,Wang Y, Juranek S, Li H, Sheng G, Wardle GS, Tuschl T, Patel DJ Nature. 2009 Oct 8;461(7265):754-61. PMID:19812667[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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