6qu1: Difference between revisions
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New page: '''Unreleased structure''' The entry 6qu1 is ON HOLD Authors: Newman, J.A., Aitkenhead, H., Gavard, A., Lim, M., Williams, H.L., Svejstrup, J.Q., von Delft, F., Arrowsmith, C.H., Edward... |
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The | ==Crystal structure of the KAP1 RBCC domain in complex with the SMARCAD1 CUE1 domain at 3.7 angstrom resolution.== | ||
<StructureSection load='6qu1' size='340' side='right'caption='[[6qu1]], [[Resolution|resolution]] 3.70Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[6qu1]] is a 2 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=6QU1 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6QU1 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]] 3.7Å</td></tr> | |||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ZN:ZINC+ION'>ZN</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=6qu1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6qu1 OCA], [https://pdbe.org/6qu1 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6qu1 RCSB], [https://www.ebi.ac.uk/pdbsum/6qu1 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6qu1 ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/TIF1B_HUMAN TIF1B_HUMAN] Nuclear corepressor for KRAB domain-containing zinc finger proteins (KRAB-ZFPs). Mediates gene silencing by recruiting CHD3, a subunit of the nucleosome remodeling and deacetylation (NuRD) complex, and SETDB1 (which specifically methylates histone H3 at 'Lys-9' (H3K9me)) to the promoter regions of KRAB target genes. Enhances transcriptional repression by coordinating the increase in H3K9me, the decrease in histone H3 'Lys-9 and 'Lys-14' acetylation (H3K9ac and H3K14ac, respectively) and the disposition of HP1 proteins to silence gene expression. Recruitment of SETDB1 induces heterochromatinization. May play a role as a coactivator for CEBPB and NR3C1 in the transcriptional activation of ORM1. Also corepressor for ERBB4. Inhibits E2F1 activity by stimulating E2F1-HDAC1 complex formation and inhibiting E2F1 acetylation. May serve as a partial backup to prevent E2F1-mediated apoptosis in the absence of RB1. Important regulator of CDKN1A/p21(CIP1). Has E3 SUMO-protein ligase activity toward itself via its PHD-type zinc finger. Also specifically sumoylates IRF7, thereby inhibiting its transactivation activity. Ubiquitinates p53/TP53 leading to its proteosomal degradation; the function is enhanced by MAGEC2 and MAGEA2, and possibly MAGEA3 and MAGEA6.<ref>PMID:8769649</ref> <ref>PMID:9016654</ref> <ref>PMID:10347202</ref> <ref>PMID:11959841</ref> <ref>PMID:15882967</ref> <ref>PMID:16107876</ref> <ref>PMID:17178852</ref> <ref>PMID:16862143</ref> <ref>PMID:17079232</ref> <ref>PMID:17704056</ref> <ref>PMID:17942393</ref> <ref>PMID:18082607</ref> <ref>PMID:18060868</ref> <ref>PMID:20858735</ref> <ref>PMID:20864041</ref> <ref>PMID:20424263</ref> <ref>PMID:21940674</ref> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Ubiquitylation, the posttranslational linkage of ubiquitin moieties to lysines in target proteins, helps regulate a myriad of biological processes. Ubiquitin, and sometimes ubiquitin-homology domains, are recognized by ubiquitin-binding domains, including CUE domains. CUE domains are thus generally thought to function by mediating interactions with ubiquitylated proteins. The chromatin remodeler, SMARCAD1, interacts with KAP1, a transcriptional corepressor. The SMARCAD1-KAP1 interaction is direct and involves the first SMARCAD1 CUE domain (CUE1) and the RBCC domain of KAP1. Here, we present a structural model of the KAP1 RBCC-SMARCAD1 CUE1 complex based on X-ray crystallography. Remarkably, CUE1, a canonical CUE domain, recognizes a cluster of exposed hydrophobic and surrounding charged/amphipathic residues on KAP1, which are presented in the context of a coiled-coil domain, not in a structure resembling ubiquitin. Together, these data suggest that CUE domains may have a wider function than simply recognizing ubiquitin and the ubiquitin-fold. | |||
A Ubiquitin-Binding Domain that Binds a Structural Fold Distinct from that of Ubiquitin.,Lim M, Newman JA, Williams HL, Masino L, Aitkenhead H, Gravard AE, Gileadi O, Svejstrup JQ Structure. 2019 May 28. pii: S0969-2126(19)30165-0. doi:, 10.1016/j.str.2019.05.003. PMID:31204252<ref>PMID:31204252</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
[[Category: | </div> | ||
[[Category: | <div class="pdbe-citations 6qu1" style="background-color:#fffaf0;"></div> | ||
[[Category: | == References == | ||
[[Category: | <references/> | ||
[[Category: | __TOC__ | ||
[[Category: | </StructureSection> | ||
[[Category: | [[Category: Homo sapiens]] | ||
[[Category: Gileadi | [[Category: Large Structures]] | ||
[[Category: Newman | [[Category: Aitkenhead H]] | ||
[[Category: | [[Category: Arrowsmith CH]] | ||
[[Category: | [[Category: Bountra C]] | ||
[[Category: | [[Category: Edwards A]] | ||
[[Category: Gavard A]] | |||
[[Category: Gileadi O]] | |||
[[Category: Lim M]] | |||
[[Category: Newman JA]] | |||
[[Category: Svejstrup JQ]] | |||
[[Category: Williams HL]] | |||
[[Category: Von Delft F]] | |||
