1ow1
From Proteopedia
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'''Crystal structure of the SPOC domain of the human transcriptional corepressor, SHARP.''' | '''Crystal structure of the SPOC domain of the human transcriptional corepressor, SHARP.''' | ||
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[[Category: Ariyoshi, M.]] | [[Category: Ariyoshi, M.]] | ||
[[Category: Schwabe, J W.]] | [[Category: Schwabe, J W.]] | ||
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| - | [[Category: | + | [[Category: Spoc domain]] |
| - | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 04:20:39 2008'' | |
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | |
Revision as of 01:20, 3 May 2008
Crystal structure of the SPOC domain of the human transcriptional corepressor, SHARP.
Overview
Spen proteins regulate the expression of key transcriptional effectors in diverse signaling pathways. They are large proteins characterized by N-terminal RNA-binding motifs and a highly conserved C-terminal SPOC domain. The specific biological role of the SPOC domain (Spen paralog and ortholog C-terminal domain), and hence, the common function of Spen proteins, has been unclear to date. The Spen protein, SHARP (SMRT/HDAC1-associated repressor protein), was identified as a component of transcriptional repression complexes in both nuclear receptor and Notch/RBP-Jkappa signaling pathways. We have determined the 1.8 A crystal structure of the SPOC domain from SHARP. This structure shows that essentially all of the conserved surface residues map to a positively charged patch. Structure-based mutational analysis indicates that this conserved region is responsible for the interaction between SHARP and the universal transcriptional corepressor SMRT/NCoR (silencing mediator for retinoid and thyroid receptors/nuclear receptor corepressor. We demonstrate that this interaction involves a highly conserved acidic motif at the C terminus of SMRT/NCoR. These findings suggest that the conserved function of the SPOC domain is to mediate interaction with SMRT/NCoR corepressors, and that Spen proteins play an essential role in the repression complex.
About this Structure
1OW1 is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
Reference
A conserved structural motif reveals the essential transcriptional repression function of Spen proteins and their role in developmental signaling., Ariyoshi M, Schwabe JW, Genes Dev. 2003 Aug 1;17(15):1909-20. PMID:12897056 Page seeded by OCA on Sat May 3 04:20:39 2008
