View source for 6oe7


==Crystal structure of HMCES cross-linked to DNA abasic site==
<StructureSection load='6oe7' size='340' side='right'caption='[[6oe7]], [[Resolution|resolution]] 2.20&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6oe7]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] and [https://en.wikipedia.org/wiki/Synthetic_construct Synthetic construct]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6OE7 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6OE7 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]] 2.2&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=DRZ:3,4-DIHYDROXY-PENTANAL-5-PHOSPHATE'>DRZ</scene>, <scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</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=6oe7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6oe7 OCA], [https://pdbe.org/6oe7 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6oe7 RCSB], [https://www.ebi.ac.uk/pdbsum/6oe7 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6oe7 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/HMCES_HUMAN HMCES_HUMAN] Specifically binds 5-hydroxymethylcytosine (5hmC)-containing DNA in stem cells, suggesting that it acts as a specific reader of 5hmC in stem cells (By similarity). May act as a peptidase; experimental evidences are however required to confirm this prediction (PubMed:23945014).<ref>PMID:23945014</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Embryonic stem cell-specific 5-hydroxymethylcytosine-binding protein (HMCES) can covalently cross-link to abasic sites in single-stranded DNA at stalled replication forks to prevent genome instability. Here, we report crystal structures of the human HMCES SOS response-associated peptidase (SRAP) domain in complex with DNA-damage substrates, including HMCES cross-linked with an abasic site within a 3' overhang DNA. HMCES interacts with both single-strand and duplex segments of DNA, with two independent duplex DNA interaction sites identified in the SRAP domain. The HMCES DNA-protein cross-link structure provides structural insights into a novel thiazolidine covalent interaction between the DNA abasic site and conserved Cys 2 of HMCES. Collectively, our structures demonstrate the capacity for the SRAP domain to interact with a variety of single-strand- and double-strand-containing DNA structures found in DNA-damage sites, including 5' and 3' overhang DNAs and gapped DNAs with short single-strand segments.

Structural basis of HMCES interactions with abasic DNA and multivalent substrate recognition.,Halabelian L, Ravichandran M, Li Y, Zeng H, Rao A, Aravind L, Arrowsmith CH Nat Struct Mol Biol. 2019 Jul;26(7):607-612. doi: 10.1038/s41594-019-0246-6. Epub, 2019 Jun 24. PMID:31235913<ref>PMID:31235913</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6oe7" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Synthetic construct]]
[[Category: Arrowsmith CH]]
[[Category: Bountra C]]
[[Category: Edwards AM]]
[[Category: Halabelian L]]
[[Category: Li Y]]
[[Category: Zeng H]]