Solution NMR Studies of an Alternative Mode of Sin3 Engagement by the Sds3 Subunit in the Histone Deacetylase-Associated Sin3L/Rpd3L Corepressor Complex.
J Mol Biol
; 427(24): 3817-23, 2015 Dec 04.
Article
in En
| MEDLINE
| ID: mdl-26522936
ABSTRACT
The Sds3 transcriptional corepressor facilitates the assembly of the 1- to 2-MDa histone deacetylase-associated Sin3L/Rpd3L complex by providing a crucial homodimerization activity. Sds3 engages the scaffolding protein Sin3A, via a bipartite motif within the Sin3 interaction domain (SID) comprising a helix and an extended segment. Here, we show that the SID samples two discrete, substantially populated conformations with lifetimes in the tens of milliseconds range. The two conformations differ via a translation of the main chain and the corresponding side chains in the 5- to 7-Å range. Given the close proximity of the SID to other functional motifs in Sds3 at the sequence level, the conformational exchange has the potential to regulate these activities.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Repressor Proteins
/
Histone Deacetylase 1
/
Sin3 Histone Deacetylase and Corepressor Complex
Type of study:
Prognostic_studies
/
Risk_factors_studies
Limits:
Humans
Language:
En
Journal:
J Mol Biol
Year:
2015
Document type:
Article
Affiliation country:
United States
Country of publication:
HOLANDA
/
HOLLAND
/
NETHERLANDS
/
NL
/
PAISES BAJOS
/
THE NETHERLANDS