4hs2: Difference between revisions
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==Crystal Structure of the Human SPOP C-terminal Domain== | |||
<StructureSection load='4hs2' size='340' side='right' caption='[[4hs2]], [[Resolution|resolution]] 1.53Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[4hs2]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4HS2 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4HS2 FirstGlance]. <br> | |||
==Function== | </td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">SPOP ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr> | ||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4hs2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4hs2 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4hs2 RCSB], [http://www.ebi.ac.uk/pdbsum/4hs2 PDBsum]</span></td></tr> | |||
</table> | |||
== Function == | |||
[[http://www.uniprot.org/uniprot/SPOP_HUMAN SPOP_HUMAN]] Inhibits IPF1/PDX1 transactivation of established target promoters, such as insulin, may be by recruiting a repressor complex (By similarity). In complex with CUL3, involved in ubiquitination of BMI1, H2AFY and DAXX, and probably also in ubiquitination and proteasomal degradation of Gli2 or Gli3.<ref>PMID:14528312</ref> <ref>PMID:15897469</ref> <ref>PMID:16524876</ref> | [[http://www.uniprot.org/uniprot/SPOP_HUMAN SPOP_HUMAN]] Inhibits IPF1/PDX1 transactivation of established target promoters, such as insulin, may be by recruiting a repressor complex (By similarity). In complex with CUL3, involved in ubiquitination of BMI1, H2AFY and DAXX, and probably also in ubiquitination and proteasomal degradation of Gli2 or Gli3.<ref>PMID:14528312</ref> <ref>PMID:15897469</ref> <ref>PMID:16524876</ref> | ||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Protein ubiquitination in eukaryotic cells is mediated by diverse E3 ligase enzymes that each target specific substrates. The cullin E3 ligase complexes are the most abundant class of E3 ligases; they contain various cullin components that serve as scaffolds for interaction with substrate-recruiting adaptor proteins. SPOP is a BTB-domain adaptor of the cullin-3 E3 ligase complexes; it selectively recruits substrates via its N-terminal MATH domain, whereas its BTB domain mediates dimerization and interactions with cullin-3. It has recently been recognized that the high-order oligomerization of SPOP enhances the ubiquitination of substrates. Here, a dimerization interface in the SPOP C-terminus is identified and it is shown that the dimerization interfaces of the BTB domain and of the C-terminus act independently and in tandem to generate high-order SPOP oligomers. The crystal structure of the dimeric SPOP C-terminal domain is reported at 1.5 A resolution and it is shown that Tyr353 plays a critical role in high-order oligomerization. A model of the high-order SPOP oligomer is presented that depicts a helical organization that could enhance the efficiency of substrate ubiquitination. | |||
Structural basis of high-order oligomerization of the cullin-3 adaptor SPOP.,van Geersdaele LK, Stead MA, Harrison CM, Carr SB, Close HJ, Rosbrook GO, Connell SD, Wright SC Acta Crystallogr D Biol Crystallogr. 2013 Sep;69(Pt 9):1677-84. doi:, 10.1107/S0907444913012687. Epub 2013 Aug 15. PMID:23999291<ref>PMID:23999291</ref> | |||
== | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
</div> | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Human]] | [[Category: Human]] | ||
[[Category: Carr, S B | [[Category: Carr, S B]] | ||
[[Category: Geersdaele, L K.Van | [[Category: Geersdaele, L K.Van]] | ||
[[Category: Stead, M A | [[Category: Stead, M A]] | ||
[[Category: Wright, S C | [[Category: Wright, S C]] | ||
[[Category: Oligomerisation]] | [[Category: Oligomerisation]] | ||
[[Category: Protein binding]] | [[Category: Protein binding]] | ||
[[Category: Protein interaction domain]] | [[Category: Protein interaction domain]] | ||
Revision as of 14:39, 25 December 2014
Crystal Structure of the Human SPOP C-terminal Domain
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