1F43

SOLUTION STRUCTURE OF THE MATA1 HOMEODOMAIN


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Cooperative ordering in homeodomain-DNA recognition: solution structure and dynamics of the MATa1 homeodomain.

Anderson, J.S.Forman, M.D.Modleski, S.Dahlquist, F.W.Baxter, S.M.

(2000) Biochemistry 39: 10045-10054


  • PubMed Abstract: 
  • The mating type homeodomain proteins, MATa1 and MATalpha2, combine to form a heterodimer to bind DNA in diploid yeast cells. The a1-alpha2 heterodimer tightly and specifically binds haploid-specific gene operators to repress transcription. On its own ...

    The mating type homeodomain proteins, MATa1 and MATalpha2, combine to form a heterodimer to bind DNA in diploid yeast cells. The a1-alpha2 heterodimer tightly and specifically binds haploid-specific gene operators to repress transcription. On its own, however, the a1 homeodomain does not bind DNA in a sequence-specific manner. To help understand this interaction, we describe the solution structure and backbone dynamics of the free a1 homeodomain. Free a1 in solution is an ensemble of structures having flexible hinges at the two turns in the small protein fold. Conformational changes in the a1 homeodomain upon ternary complex formation are located in the loop between helix 1 and helix 2, where the C-terminal tail of alpha2 binds to form the heterodimer, and at the C-terminus of helix 3, the DNA recognition helix. The observed differences, comparing the free and bound a1 structures, suggest a mechanism linking van der Waals stacking changes to the ordering of a final turn in the DNA-binding helix of a1. The tail of alpha2 induces changes in loop 1 of a1 that push it toward a properly folded DNA binding conformation.


    Organizational Affiliation

    Department of Chemistry, Union College, Schenectady, New York 12308, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
MATING-TYPE PROTEIN A-1
A
61Saccharomyces cerevisiaeGene Names: MATA1 (MAT1A)
Find proteins for P0CY10 (Saccharomyces cerevisiae)
Go to UniProtKB:  P0CY10
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 
  • Olderado: 1F43 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-07-26
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance