8f3k
From Proteopedia
(Difference between revisions)
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== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[8f3k]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Neisseria_chenwenguii Neisseria chenwenguii]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8F3K OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8F3K FirstGlance]. <br> | <table><tr><td colspan='2'>[[8f3k]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Neisseria_chenwenguii Neisseria chenwenguii]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8F3K OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8F3K FirstGlance]. <br> | ||
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene>, <scene name='pdbligand=NH4:AMMONIUM+ION'>NH4</scene>, <scene name='pdbligand=TRS:2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL'>TRS</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]] 2.1Å</td></tr> |
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene>, <scene name='pdbligand=NH4:AMMONIUM+ION'>NH4</scene>, <scene name='pdbligand=TRS:2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL'>TRS</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=8f3k FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8f3k OCA], [https://pdbe.org/8f3k PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8f3k RCSB], [https://www.ebi.ac.uk/pdbsum/8f3k PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8f3k ProSAT]</span></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=8f3k FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8f3k OCA], [https://pdbe.org/8f3k PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8f3k RCSB], [https://www.ebi.ac.uk/pdbsum/8f3k PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8f3k ProSAT]</span></td></tr> | ||
</table> | </table> | ||
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Anti-CRISPR proteins inhibit CRISPR-Cas immune systems through diverse mechanisms. Previously, the anti-CRISPR protein AcrIIC5(Smu) was shown to potently inhibit a type II-C Cas9 from Neisseria meningitidis (Nme1Cas9). In this work, we explore the mechanism of activity of the AcrIIC5 homologue from Neisseria chenwenguii (AcrIIC5(Nch)) and show that it prevents Cas9 binding to target DNA. We show that AcrIIC5(Nch) targets the PAM-interacting domain (PID) of Nme1Cas9 for inhibition, agreeing with previous findings for AcrIIC5(Smu), and newly establish that strong binding of the anti-CRISPR requires guide RNA be pre-loaded on Cas9. We determined the crystal structure of AcrIIC5(Nch) using X-ray crystallography and identified amino acid residues that are critical for its function. Using a protein docking algorithm we show that AcrIIC5(Nch) likely occupies the Cas9 DNA binding pocket, thereby inhibiting target DNA binding through a mechanism similar to that previously described for AcrIIA2 and AcrIIA4. | Anti-CRISPR proteins inhibit CRISPR-Cas immune systems through diverse mechanisms. Previously, the anti-CRISPR protein AcrIIC5(Smu) was shown to potently inhibit a type II-C Cas9 from Neisseria meningitidis (Nme1Cas9). In this work, we explore the mechanism of activity of the AcrIIC5 homologue from Neisseria chenwenguii (AcrIIC5(Nch)) and show that it prevents Cas9 binding to target DNA. We show that AcrIIC5(Nch) targets the PAM-interacting domain (PID) of Nme1Cas9 for inhibition, agreeing with previous findings for AcrIIC5(Smu), and newly establish that strong binding of the anti-CRISPR requires guide RNA be pre-loaded on Cas9. We determined the crystal structure of AcrIIC5(Nch) using X-ray crystallography and identified amino acid residues that are critical for its function. Using a protein docking algorithm we show that AcrIIC5(Nch) likely occupies the Cas9 DNA binding pocket, thereby inhibiting target DNA binding through a mechanism similar to that previously described for AcrIIA2 and AcrIIA4. | ||
| - | Anti-CRISPR Protein AcrIIC5 Inhibits CRISPR-Cas9 by Occupying the Target DNA Binding Pocket.,Hwang S, Shah M, Garcia B, Hashem N, Davidson AR, Moraes TF, Maxwell KL J Mol Biol. 2023 | + | Anti-CRISPR Protein AcrIIC5 Inhibits CRISPR-Cas9 by Occupying the Target DNA Binding Pocket.,Hwang S, Shah M, Garcia B, Hashem N, Davidson AR, Moraes TF, Maxwell KL J Mol Biol. 2023 Apr 1;435(7):167991. doi: 10.1016/j.jmb.2023.167991. Epub 2023 , Feb 2. PMID:36736884<ref>PMID:36736884</ref> |
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> | ||
Current revision
Anti-CRISPR protein AcrIIC5 inhibits CRISPR-Cas9 by acting as a DNA mimic
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