2L9S

Solution structure of Pf1 SID1-mSin3A PAH2 Complex


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 80 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the least restraint violations 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Solution Structure of the mSin3A PAH2-Pf1 SID1 Complex: A Mad1/Mxd1-Like Interaction Disrupted by MRG15 in the Rpd3S/Sin3S Complex.

Kumar, G.S.Xie, T.Zhang, Y.Radhakrishnan, I.

(2011) J.Mol.Biol. 408: 987-1000

  • DOI: 10.1016/j.jmb.2011.03.043

  • PubMed Abstract: 
  • Histone deacetylation constitutes an important mechanism for silencing genes. The histone-deacetylase-associated mammalian Rpd3S/Sin3S corepressor complex plays key roles in repressing aberrant gene transcription from cryptic transcription initiation ...

    Histone deacetylation constitutes an important mechanism for silencing genes. The histone-deacetylase-associated mammalian Rpd3S/Sin3S corepressor complex plays key roles in repressing aberrant gene transcription from cryptic transcription initiation sites and in mitigating RNA polymerase II progression in intragenic regions of actively transcribed genes. The Sin3 corepressor functions as a molecular adaptor linking histone deacetylases on the one hand, with the chromatin targeting subunits Pf1 and MRG15 on the other. Pf1 also functions as an adaptor by interacting with MRG15 and engaging in multivalent interactions with Sin3 targeting among other domains the two N-terminal paired amphipathic helix (PAH) domains that serve as sites of interaction with sequence-specific DNA-binding transcription factors. Here, we structurally and functionally evaluate the interaction between the PAH2 domain of mSin3A and the Sin3 interaction domain 1 (SID1) motif of Pf1 and find the structural aspects to be reminiscent of the interaction between the Mad1/Mxd1 transcription factor and Sin3. Pf1 residues within a highly conserved sequence motif immediately C-terminal to SID1 appear not to be important for the interaction with Sin3 PAH2. Unexpectedly, the MRG15 subunit competes, rather than collaborates, with Sin3 for the Pf1 segment encompassing the two conserved motifs, implying competition between two subunits for another subunit of the same chromatin-modifying complex.


    Organizational Affiliation

    Department of Molecular Biosciences, Northwestern University, Evanston, IL 60208-3500, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PHD finger protein 12
A
45Homo sapiensMutation(s): 0 
Gene Names: PHF12 (KIAA1523)
Find proteins for Q96QT6 (Homo sapiens)
Go to Gene View: PHF12
Go to UniProtKB:  Q96QT6
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Paired amphipathic helix protein Sin3a
B
94Mus musculusMutation(s): 0 
Gene Names: Sin3a (Kiaa4126)
Find proteins for Q60520 (Mus musculus)
Go to UniProtKB:  Q60520
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 80 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the least restraint violations 
  • Olderado: 2L9S Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-05-11
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance