1PRA

DETERMINATION OF THE NUCLEAR MAGNETIC RESONANCE SOLUTION STRUCTURE OF THE DNA-BINDING DOMAIN (RESIDUES 1 TO 69) OF THE 434 REPRESSOR AND COMPARISON WITH THE X-RAY CRYSTAL STRUCTURE


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 20 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Determination of the nuclear magnetic resonance solution structure of the DNA-binding domain (residues 1 to 69) of the 434 repressor and comparison with the X-ray crystal structure.

Neri, D.Billeter, M.Wuthrich, K.

(1992) J.Mol.Biol. 223: 743-767


  • PubMed Abstract: 
  • The DNA-binding domain of the phage 434 repressor consisting of N-terminal residues 1 to 69 (434 repressor(1-69)), was expressed in Escherichia coli with natural isotope abundance, uniform 15N-labeling and biosynthetically directed fractional 13C-lab ...

    The DNA-binding domain of the phage 434 repressor consisting of N-terminal residues 1 to 69 (434 repressor(1-69)), was expressed in Escherichia coli with natural isotope abundance, uniform 15N-labeling and biosynthetically directed fractional 13C-labeling in extent of about 10%. With these protein preparations the three-dimensional structure was determined in solution. The techniques used were nuclear magnetic resonance (n.m.r.) spectroscopy for the collection of conformational constraints, calculation of the protein structure from the n.m.r. data with the program DIANA and structure refinements by restrained energy minimization with a modified version of the program AMBER. A group of 20 conformers characterizes a well-defined structure for residues 1 to 63, with an average of 0-6 A for the root-mean-square deviations (RMSD) calculated for the backbone atoms of the individual conformers relative to the mean co-ordinates. The spatial structure of C-terminal residues 64 to 69 is not defined by the n.m.r. data. The molecular architecture of the 434 repressor(1-69) in solution includes five alpha-helices extending from residues 2 to 13, 17 to 24, 28 to 35, 45 to 52 and 56 to 60, which enclose a well-defined hydrophobic core. The n.m.r. structure is closely similar to the reported crystal structure of the 434 repressor(1-69), with an RMSD value of 1.1 A for the backbone atoms of residues 1 to 63. Small differences between the two structures in regions of the first helix and the loop between helices 3 and 4 were analyzed relative to possible correlations with protein-protein contacts in the crystal lattice and the different milieus of pH and ionic strength in the crystals and n.m.r. samples. Further systematic comparisons of local conformational features indicated that there are correlations between amino acid types, local precision of the structure determination by both techniques and local differences between the structures in the crystals and in solution. Overall, hydrophobic residues are most precisely characterized and agree most closely in the two environments.


    Related Citations: 
    • Structure of the Amino-Terminal Domain of Phage 434 Repressor at 2.0 Angstroms Resolution
      Mondragon, A.,Subbiah, S.,Almo, S.C.,Drottar, M.,Harrison, S.C.
      (1989) J.Mol.Biol. 205: 189


    Organizational Affiliation

    Institut für Molekularbiologie und Biophysik Eidgenössische Technische Hochschule-Hönggerberg, Zürich, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
434 REPRESSOR
A
69Enterobacteria phage 434Gene Names: CI
Find proteins for P16117 (Enterobacteria phage 434)
Go to UniProtKB:  P16117
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 20 
  • Olderado: 1PRA Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1993-10-31
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance