1MNT

SOLUTION STRUCTURE OF DIMERIC MNT REPRESSOR (1-76)


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 15 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Solution structure of dimeric Mnt repressor (1-76).

Burgering, M.J.Boelens, R.Gilbert, D.E.Breg, J.N.Knight, K.L.Sauer, R.T.Kaptein, R.

(1994) Biochemistry 33: 15036-15045

  • DOI: 10.1021/bi00254a012
  • Primary Citation of Related Structures:  
    1MNT

  • PubMed Abstract: 
  • Wild-type Mnt repressor of Salmonella bacteriophage P22 is a tetrameric protein of 82 residues per monomer. A C-terminal deletion mutant of the repressor denoted Mnt (1-76) is a dimer in solution. The structure of this dimer has been determined using NMR ...

    Wild-type Mnt repressor of Salmonella bacteriophage P22 is a tetrameric protein of 82 residues per monomer. A C-terminal deletion mutant of the repressor denoted Mnt (1-76) is a dimer in solution. The structure of this dimer has been determined using NMR. The NMR assignments of the majority of the 1H, 15N, and 13C resonances were obtained using 2D and triple-resonance 3D techniques. Elements of secondary structure were identified on the basis of characteristic sequential and medium range NOEs. For the structure determination more than 1000 NOEs per monomer were obtained, and structures were generated using distance geometry and restrained simulated annealing calculations. The discrimination of intra- vs intermonomer NOEs was based upon the observation of intersubunit NOEs in [15N,13C] double half-filtered NOESY experiments. The N-terminal part of Mnt (residues 1-44), which shows a 40% sequence homology with the Arc repressor, has a similar secondary and tertiary structure. Mnt (1-76) continues with a loop region of irregular structure, a third alpha-helix, and a random coil C-terminal peptide. Analysis of the secondary structure NOEs, the exchange rates, and the backbone chemical shifts suggests that the carboxy-terminal third helix is less stable than the remainder of the protein, but the observation of intersubunit NOEs for this part of the protein enables the positioning of this helix. The rsmd's between the backbone atoms of the N-terminal part of the Mnt repressor (residues 5-43, 5'-43') and the Arc repressor is 1.58 A, and between this region and the corresponding part of the MetJ repressor 1.43 A.


    Related Citations: 
    • Observation of Inter-Subunit Noes in a Dimeric P22 Mnt Repressor Mutant by a Time-Shared [15N, 13C] Double Half Filter Technique
      Burgering, M.J.M., Boelens, R., Kaptein, R.
      (1993) J Biomol NMR 3: 709
    • Structure of Arc Repressor in Solution: Evidence for a Family of B-Sheet DNA-Binding Protein
      Breg, J.N., Van Opheusden, J.H.J., Burgering, M.J.M., Boelens, R., Kaptein, R.
      (1990) Nature 346: 586
    • The Mnt Repressor of Bacteriophage P22: Role of the C-Terminal Residues in Operator Binding and Tetramer Formation
      Knight, K.L., Sauer, R.T.
      (1988) Biochemistry 27: 2088

    Organizational Affiliation

    Bijvoet Center for Biomolecular Research, Utrecht University, The Netherlands.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
MNT REPRESSORA, B76Salmonella virus P22Mutation(s): 0 
Gene Names: mnt
UniProt
Find proteins for P03049 (Salmonella phage P22)
Explore P03049 
Go to UniProtKB:  P03049
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP03049
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 15 
  • OLDERADO: 1MNT Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1994-09-30
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2022-02-23
    Changes: Database references, Derived calculations, Other