2ZRI

MsRecA Q196A ADP form IV


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.218 
  • R-Value Observed: 0.218 

Starting Model: experimental
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This is version 1.3 of the entry. See complete history


Literature

Functionally important movements in RecA molecules and filaments: studies involving mutation and environmental changes

Prabu, J.R.Manjunath, G.P.Chandra, N.R.Muniyappa, K.Vijayan, M.

(2008) Acta Crystallogr D Biol Crystallogr 64: 1146-1157

  • DOI: https://doi.org/10.1107/S0907444908028448
  • Primary Citation of Related Structures:  
    2ZR0, 2ZR7, 2ZR9, 2ZRA, 2ZRB, 2ZRC, 2ZRD, 2ZRE, 2ZRF, 2ZRG, 2ZRH, 2ZRI, 2ZRJ, 2ZRK, 2ZRL, 2ZRM, 2ZRN, 2ZRO, 2ZRP

  • PubMed Abstract: 

    The crystal structures of mutants of Mycobacterium smegmatis RecA (MsRecA) involving changes of Gln196 from glutamine to alanine, asparagine and glutamic acid, wild-type MsRecA and several of their nucleotide complexes have been determined using mostly low-temperature and partly room-temperature X-ray data. At both temperatures, nucleotide binding results in a movement of Gln196 towards the bound nucleotide in the wild-type protein. This movement is abolished in the mutants, thus establishing the structural basis for the triggering action of the residue in terms of the size, shape and the chemical nature of the side chain. The 19 crystal structures reported here, together with 11 previously reported MsRecA structures, provide further elaboration of the relation between the pitch of the ;inactive' RecA filament, the orientation of the C-terminal domain with respect to the main domain and the location of the switch residue. The low-temperature structures define one extreme of the range of positions the C-terminal domain can occupy. The movement of the C-terminal domain is correlated with those of the LexA-binding loop and the loop that connects the main and the N-terminal domains. These elements of molecular plasticity are made use of in the transition to the ;active' filament, as evidenced by the recently reported structures of RecA-DNA complexes. The available structures of RecA resulting from X-ray and electron-microscopic studies appear to represent different stages in the trajectory of the allosteric transformations of the RecA filament. The work reported here contributes to the description of the early stages of this trajectory and provides insight into structures relevant to the later stages.


  • Organizational Affiliation

    Molecular Biophysics Unit, Indian Institute of Science, Bangalore 560012, India.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Protein recA349Mycolicibacterium smegmatis MC2 155Mutation(s): 1 
EC: 3.4.99.37
UniProt
Find proteins for Q59560 (Mycolicibacterium smegmatis (strain ATCC 700084 / mc(2)155))
Explore Q59560 
Go to UniProtKB:  Q59560
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ59560
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.218 
  • R-Value Observed: 0.218 
  • Space Group: P 61
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 102.089α = 90
b = 102.089β = 90
c = 74.41γ = 120
Software Package:
Software NamePurpose
CNSrefinement
MAR345dtbdata collection
MOSFLMdata reduction
SCALAdata scaling
AMoREphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-12-09
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Non-polymer description, Version format compliance
  • Version 1.2: 2021-11-10
    Changes: Database references, Derived calculations
  • Version 1.3: 2023-11-01
    Changes: Data collection, Refinement description