View source for 4a15


==Crystal structure of an XPD DNA complex==
<StructureSection load='4a15' size='340' side='right'caption='[[4a15]], [[Resolution|resolution]] 2.20&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4a15]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Thermoplasma_acidophilum Thermoplasma acidophilum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4A15 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4A15 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=CA:CALCIUM+ION'>CA</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=4a15 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4a15 OCA], [https://pdbe.org/4a15 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4a15 RCSB], [https://www.ebi.ac.uk/pdbsum/4a15 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4a15 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/XPD_THEAC XPD_THEAC] ATP-dependent 5'-3' DNA helicase involved in nucleotide excision repair (NER) of DNA (By similarity).
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The XPD protein is a vital subunit of the general transcription factor TFIIH which is not only involved in transcription but is also an essential component of the eukaryotic nucleotide excision DNA repair (NER) pathway. XPD is a superfamily-2 5'-3' helicase containing an iron-sulphur cluster. Its helicase activity is indispensable for NER and it plays a role in the damage verification process. Here, we report the first structure of XPD from Thermoplasma acidophilum (taXPD) in complex with a short DNA fragment, thus revealing the polarity of the translocated strand and providing insights into how the enzyme achieves its 5'-3' directionality. Accompanied by a detailed mutational and biochemical analysis of taXPD, we define the path of the translocated DNA strand through the protein and identify amino acids that are critical for protein function.

Functional and structural studies of the nucleotide excision repair helicase XPD suggest a polarity for DNA translocation.,Kuper J, Wolski SC, Michels G, Kisker C EMBO J. 2011 Nov 11;31(2):494-502. doi: 10.1038/emboj.2011.374. PMID:22081108<ref>PMID:22081108</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 4a15" style="background-color:#fffaf0;"></div>

==See Also==
*[[Helicase 3D structures|Helicase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Thermoplasma acidophilum]]
[[Category: Kisker C]]
[[Category: Kuper J]]
[[Category: Michels G]]
[[Category: Wolski SC]]