View source for 8jpx


==Cryo-EM structure of PfAgo-guide DNA-target DNA complex==
<StructureSection load='8jpx' size='340' side='right'caption='[[8jpx]], [[Resolution|resolution]] 2.90&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[8jpx]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/Pyrococcus_furiosus_DSM_3638 Pyrococcus furiosus DSM 3638]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8JPX OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8JPX FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 2.9&#8491;</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='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=8jpx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8jpx OCA], [https://pdbe.org/8jpx PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8jpx RCSB], [https://www.ebi.ac.uk/pdbsum/8jpx PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8jpx ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/AGO_PYRFU AGO_PYRFU] A DNA-guided ssDNA endonuclease that may play a role in defense against invading mobile genetic elements. Uses short 5'-phospho-ssDNA sequences as guides (gDNA) to bind complementary target strands, resulting in cleavage of the target DNA (tDNA). Endonucleolytically cleaves DNA in short dsDNA (the gDNA indicates where to cleave on the tDNA). Efficient guide-dependent target DNA cleavage requires a minimal gDNA length of 15 nucleotides (nt) and works up to at least 31 nt. Overexpression decreases plasmid transformation efficiency. Has no appreciable activity with gRNA or on target RNA. Also has guide-independent activity on plasmid DNA called 'chopping' (PubMed:25925567). The cleavage site is 10 nucleotides (nt) downstream of the target residue base-paired with the 5'-end of the gDNA, cleavage is insensitive to adenine methylation. DNA cleavage produces 5'-phosphomonoesters (as it can be ligated by T4 DNA ligase) (PubMed:28165224).<ref>PMID:25925567</ref> <ref>PMID:28165224</ref> 
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Pyrococcus furiosus DSM 3638]]
[[Category: Zhuang L]]