1GM5

Structure of RecG bound to three-way DNA junction


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.24 Å
  • R-Value Free: 0.328 
  • R-Value Work: 0.272 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural Analysis of DNA Replication Fork Reversal by Recg

Singleton, M.R.Scaife, S.Wigley, D.B.

(2001) Cell 107: 79


  • PubMed Abstract: 
  • The stalling of DNA replication forks that occurs as a consequence of encountering DNA damage is a critical problem for cells. RecG protein is involved in the processing of stalled replication forks, and acts by reversing the fork past the damage to ...

    The stalling of DNA replication forks that occurs as a consequence of encountering DNA damage is a critical problem for cells. RecG protein is involved in the processing of stalled replication forks, and acts by reversing the fork past the damage to create a four-way junction that allows template switching and lesion bypass. We have determined the crystal structure of RecG bound to a DNA substrate that mimics a stalled replication fork. The structure not only reveals the elegant mechanism used by the protein to recognize junctions but has also trapped the protein in the initial stage of fork reversal. We propose a mechanism for how forks are processed by RecG to facilitate replication fork restart. In addition, this structure suggests that the mechanism and function of the two largest helicase superfamilies are distinct.


    Organizational Affiliation

    ICRF Clare Hall Laboratories, Blanche Lane, South Mimms, Potters Bar, Hertfordshire EN6 3LD, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
RECG
A
780Thermotoga maritima (strain ATCC 43589 / MSB8 / DSM 3109 / JCM 10099)Mutation(s): 0 
Gene Names: recG
EC: 3.6.4.12
Find proteins for Q9WY48 (Thermotoga maritima (strain ATCC 43589 / MSB8 / DSM 3109 / JCM 10099))
Go to UniProtKB:  Q9WY48
Entity ID: 2
MoleculeChainsLengthOrganism
DNA (5'-(*CP*AP*GP*CP*TP*CP*CP*AP*TP*GP*AP*TP* CP*AP*TP*TP*GP*GP*CP*A)-3')X20N/A
Entity ID: 3
MoleculeChainsLengthOrganism
DNA (5'-(*GP*CP*AP*GP*TP*GP*CP*TP*CP*GP*CP*AP* TP*GP*GP*AP*GP*CP*TP*G)-3')Y20N/A
Entity ID: 4
MoleculeChainsLengthOrganism
DNA (5'-(*GP*AP*GP*CP*AP*CP*TP*GP*C)-3')Z9N/A
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ADP
Query on ADP

Download SDF File 
Download CCD File 
A
ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.24 Å
  • R-Value Free: 0.328 
  • R-Value Work: 0.272 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 133.704α = 90.00
b = 144.602β = 113.82
c = 84.023γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-10-03
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance