1PD7 image
Deposition Date 2003-05-19
Release Date 2004-01-20
Last Version Date 2024-05-22
Entry Detail
PDB ID:
1PD7
Keywords:
Title:
Extended SID of Mad1 bound to the PAH2 domain of mSin3B
Biological Source:
Source Organism:
Mus musculus (Taxon ID: 10090)
(Taxon ID: )
Host Organism:
Method Details:
Experimental Method:
Conformers Calculated:
200
Conformers Submitted:
30
Selection Criteria:
structures with the lowest energy
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Sin3b protein
Gene (Uniprot):Sin3b
Chain IDs:A
Chain Length:85
Number of Molecules:1
Biological Source:Mus musculus
Polymer Type:polypeptide(L)
Molecule:Mad1
Gene (Uniprot):MXD1
Chain IDs:B
Chain Length:24
Number of Molecules:1
Biological Source:
Ligand Molecules
Primary Citation
Extension of the binding motif of the sin3 interacting domain of the mad family proteins(,).
Biochemistry 43 46 54 (2004)
PMID: 14705930

Abstact

Sin3 forms the scaffold for a multiprotein corepressor complex that silences transcription via the action of histone deacetylases. Sin3 is recruited to the DNA by several DNA binding repressors, such as the helix-loop-helix proteins of the Mad family. Here, we elaborate on the Mad-Sin3 interaction based on a binding study, solution structure, and dynamics of the PAH2 domain of mSin3 in complex to an extended Sin3 interacting domain (SID) of 24 residues of Mad1. We show that SID residues Met7 and Glu23, outside the previously defined minimal binding motif, mediate additional hydrophobic and electrostatic interactions with PAH2. On the basis of these results we propose an extended consensus sequence describing the PAH2-SID interaction specifically for the Mad family, showing that residues outside the hydrophobic core of the SID interact with PAH2 and modulate binding affinity to appropriate levels.

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Primary Citation of related structures