1AA3

C-TERMINAL DOMAIN OF THE E. COLI RECA, NMR, MINIMIZED AVERAGE STRUCTURE


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 
  • Selection Criteria: AVERAGED MINIMIZED STRUCTURE 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

An interaction between a specified surface of the C-terminal domain of RecA protein and double-stranded DNA for homologous pairing.

Aihara, H.Ito, Y.Kurumizaka, H.Terada, T.Yokoyama, S.Shibata, T.

(1997) J.Mol.Biol. 274: 213-221

  • DOI: 10.1006/jmbi.1997.1403

  • PubMed Abstract: 
  • RecA protein and its homologs catalyze homologous pairing of dsDNA and ssDNA, a critical reaction in homologous genetic recombination in various organisms from a virus, microbes to higher eukaryotes. In this reaction, RecA protein forms a nucleoprote ...

    RecA protein and its homologs catalyze homologous pairing of dsDNA and ssDNA, a critical reaction in homologous genetic recombination in various organisms from a virus, microbes to higher eukaryotes. In this reaction, RecA protein forms a nucleoprotein filament on ssDNA, which in turn binds to naked dsDNA for homology search. We suggested that the C-terminal domain of RecA protein plays a role in capturing the dsDNA. Here, we isolated the C-terminal domain as a soluble form and determined the solution structure by NMR spectroscopy. The overall folding of the NMR structure agrees with that of the corresponding part of the reported crystal structure, but a remarkable difference was found in a solvent-exposed region due to intermolecular contacts in the crystal. Then, we studied the interaction between the C-terminal domain and DNA, and found that significant chemical shift changes were induced in a specific region by titration with dsDNA. SsDNA induced a much smaller chemical shift perturbation. The difference of DNA concentrations to give the half-saturation of the chemical shift change showed a higher affinity of the C-terminal region toward dsDNA. Combined with our previous results, these provide direct evidence that the defined region in the C-terminal domain furnishes a binding surface for DNA.


    Organizational Affiliation

    The Institute of Physical and Chemical Research (RIKEN), Wako-shi, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
RECA
A
63Escherichia coli (strain K12)Gene Names: recA (lexB, recH, rnmB, tif, umuB, zab)
Find proteins for P0A7G6 (Escherichia coli (strain K12))
Go to UniProtKB:  P0A7G6
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 
  • Selection Criteria: AVERAGED MINIMIZED STRUCTURE 
Software Package:
Software NamePurpose
X-PLORrefinement
X-PLORmodel building
X-PLORphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1997-07-23
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Source and taxonomy, Version format compliance