View source for 3qea


==Crystal structure of human exonuclease 1 Exo1 (WT) in complex with DNA (complex II)==
<StructureSection load='3qea' size='340' side='right'caption='[[3qea]], [[Resolution|resolution]] 3.10&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3qea]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3QEA OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3QEA 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]] 3.1&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BA:BARIUM+ION'>BA</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=3qea FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3qea OCA], [https://pdbe.org/3qea PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3qea RCSB], [https://www.ebi.ac.uk/pdbsum/3qea PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3qea ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/EXO1_HUMAN EXO1_HUMAN] 5'->3' double-stranded DNA exonuclease which may also possess a cryptic 3'->5' double-stranded DNA exonuclease activity. Functions in DNA mismatch repair (MMR) to excise mismatch-containing DNA tracts directed by strand breaks located either 5' or 3' to the mismatch. Also exhibits endonuclease activity against 5'-overhanging flap structures similar to those generated by displacement synthesis when DNA polymerase encounters the 5'-end of a downstream Okazaki fragment. Required for somatic hypermutation (SHM) and class switch recombination (CSR) of immunoglobulin genes. Essential for male and female meiosis.<ref>PMID:10364235</ref> <ref>PMID:10608837</ref> <ref>PMID:11809771</ref> <ref>PMID:11842105</ref> <ref>PMID:12414623</ref> <ref>PMID:12704184</ref> <ref>PMID:14636568</ref> <ref>PMID:14676842</ref> <ref>PMID:15225546</ref> <ref>PMID:15886194</ref> <ref>PMID:16143102</ref> <ref>PMID:9685493</ref> 

==See Also==
*[[Exonuclease 3D structures|Exonuclease 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Beese LS]]
[[Category: Hast MA]]
[[Category: Hellinga HW]]
[[Category: Iyer RR]]
[[Category: McSweeney EA]]
[[Category: Modrich P]]
[[Category: Orans J]]