2REB

THE STRUCTURE OF THE E. COLI RECA PROTEIN MONOMER AND POLYMER

• PDB DOI: https://doi.org/10.2210/pdb2REB/pdb

• Classification: DNA BINDING PROTEIN
• Organism(s): Escherichia coli
• Mutation(s): No 


• Deposited: 1992-03-06 Released: 1993-10-31 
• Deposition Author(s): Story, R.M., Steitz, T.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Work: 0.210 
• R-Value Observed: 0.210 

Literature

The structure of the E. coli recA protein monomer and polymer.

Story, R.M., Weber, I.T., Steitz, T.A.

(1992) Nature 355: 318-325

• PubMed: 1731246 
• DOI: https://doi.org/10.1038/355318a0
• Primary Citation of Related Structures:  
  2REB


• PubMed Abstract: 
  

  The crystal structure of the recA protein from Escherichia coli at 2.3-A resolution reveals a major domain that binds ADP and probably single- and double-stranded DNA. Two smaller subdomains at the N and C termini protrude from the protein and respectively stabilize a 6(1) helical polymer of protein subunits and interpolymer bundles. This polymer structure closely resembles that of recA/DNA filaments determined by electron microscopy. Mutations in recA protein that enhance coprotease, DNA-binding and/or strand-exchange activity can be explained if the interpolymer interactions in the crystal reflect a regulatory mechanism in vivo.

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Organizational Affiliation: 

Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, Connecticut 06511.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 37.89 kDa 
• Atom Count: 2,413 
• Modelled Residue Count: 303 
• Deposited Residue Count: 352 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
REC A	A	352	Escherichia coli	Mutation(s): 0
UniProt
Find proteins for P0A7G6 (Escherichia coli (strain K12)) Explore P0A7G6  Go to UniProtKB:  P0A7G6

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Work: 0.210 
• R-Value Observed: 0.210 
• Space Group: P 6₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 102.4	α = 90
b = 102.4	β = 90
c = 82.7	γ = 120

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1993-10-31 
Deposition Author(s): Story, R.M., Steitz, T.A.

Revision History  

• Version 1.0: 1993-10-31
  Type: Initial release
  
• Version 1.1: 2008-03-25
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2012-05-09
  Changes: Other
• Version 1.4: 2024-02-21
  Changes: Data collection, Database references, Other