1MNM

YEAST MATALPHA2/MCM1/DNA TERNARY TRANSCRIPTION COMPLEX CRYSTAL STRUCTURE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.240 
  • R-Value Observed: 0.240 

Starting Models: experimental
View more details

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Crystal structure of the yeast MATalpha2/MCM1/DNA ternary complex.

Tan, S.Richmond, T.J.

(1998) Nature 391: 660-666

  • DOI: https://doi.org/10.1038/35563
  • Primary Citation of Related Structures:  
    1MNM

  • PubMed Abstract: 

    The structure of a complex containing the homeodomain repressor protein MATalpha2 and the MADS-box transcription factor MCM1 bound to DNA has been determined by X-ray crystallography at 2.25 A resolution. It reveals the protein-protein interactions responsible for cooperative binding of MATalpha2 and MCM1 to DNA. The otherwise flexible amino-terminal extension of the MATalpha2 homeodomain forms a beta-hairpin that grips the MCM1 surface through parallel beta-strand hydrogen bonds and close-packed, predominantly hydrophobic, side chains. DNA bending induced by MCM1 brings the two proteins closer together, facilitating their interaction. An unusual feature of the complex is that an eight-amino-acid sequence adopts an alpha-helical conformation in one of two copies of the MATalpha2 monomer and a beta-strand conformation in the other. This 'chameleon' sequence of MATalpha2 may be important for recognizing natural operator sites.


  • Organizational Affiliation

    ETH-Zurich, Institut für Molekularbiologie und Biophysik, Switzerland.


Macromolecules

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
PROTEIN (MCM1 TRANSCRIPTIONAL REGULATOR)C [auth A],
D [auth B]
100Saccharomyces cerevisiaeMutation(s): 0 
UniProt
Find proteins for P11746 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P11746 
Go to UniProtKB:  P11746
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP11746
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
PROTEIN (MAT ALPHA-2 TRANSCRIPTIONAL REPRESSOR)E [auth C],
F [auth D]
87Saccharomyces cerevisiaeMutation(s): 0 
UniProt
Find proteins for P0CY08 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P0CY08 
Go to UniProtKB:  P0CY08
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0CY08
Sequence Annotations
Expand
  • Reference Sequence
Find similar nucleic acids by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains LengthOrganismImage
DNA (STE6 OPERATOR DNA)A [auth E]26synthetic construct
Sequence Annotations
Expand
  • Reference Sequence
Find similar nucleic acids by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains LengthOrganismImage
DNA (STE6 OPERATOR DNA)B [auth F]26synthetic construct
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.240 
  • R-Value Observed: 0.240 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 70.62α = 90
b = 72.55β = 90
c = 150.7γ = 90
Software Package:
Software NamePurpose
AMoREphasing
X-PLORrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1998-03-18
    Type: Initial release
  • Version 1.1: 2008-05-22
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-02-15
    Changes: Source and taxonomy, Structure summary
  • Version 1.4: 2023-08-02
    Changes: Database references, Refinement description