3u4q: Difference between revisions
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New page: '''Unreleased structure''' The entry 3u4q is ON HOLD Authors: Saikrishnan, K., Krajewski, W., Wigley, D. Description: Structure of AddAB-DNA complex at 2.8 angstroms |
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==Structure of AddAB-DNA complex at 2.8 angstroms== | |||
<StructureSection load='3u4q' size='340' side='right'caption='[[3u4q]], [[Resolution|resolution]] 2.80Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[3u4q]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Bacillus_subtilis Bacillus subtilis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3U4Q OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3U4Q FirstGlance]. <br> | |||
</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=EDO:1,2-ETHANEDIOL'>EDO</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=3u4q FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3u4q OCA], [https://pdbe.org/3u4q PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3u4q RCSB], [https://www.ebi.ac.uk/pdbsum/3u4q PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3u4q ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/ADDA_BACSU ADDA_BACSU] An essential component of the DNA double-stranded break repair machinery, the heterodimer acts as both an ATP-dependent DNA helicase and an ATP-dependent, dual-direction single-stranded exonuclease. Recognizes the B.subtilis chi site (5'-AGCGG-3') which transforms the enzyme from a helicase which degrades both DNA strands to one with only 5' -> 3' exonuclease activity. This generates a double-stranded DNA with a protruding 3'-terminated single-stranded tail suitable for the initiation of homologous recombination (chi fragment). The AddA nuclease domain in particular is required for chi fragment generation; this subunit has 3' -> 5' nuclease and helicase activity. RecA thread formation during DNA double-strand break repair requires RecJ or AddAB.<ref>PMID:8387145</ref> <ref>PMID:10756102</ref> <ref>PMID:17570399</ref> | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Bacillus subtilis]] | |||
[[Category: Large Structures]] | |||
[[Category: Krajewski W]] | |||
[[Category: Saikrishnan K]] | |||
[[Category: Wigley D]] | |||
