3UJ3

Crystal Structure of the synaptic tetramer of the G-Segment Invertase (Gin)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.51 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.257 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Crystal structure of an intermediate of rotating dimers within the synaptic tetramer of the G-segment invertase.

Ritacco, C.J.Kamtekar, S.Wang, J.Steitz, T.A.

(2013) Nucleic Acids Res. 41: 2673-2682

  • DOI: 10.1093/nar/gks1303

  • PubMed Abstract: 
  • The serine family of site-specific DNA recombination enzymes accomplishes strand cleavage, exchange and religation using a synaptic protein tetramer. A double-strand break intermediate in which each protein subunit is covalently linked to the target ...

    The serine family of site-specific DNA recombination enzymes accomplishes strand cleavage, exchange and religation using a synaptic protein tetramer. A double-strand break intermediate in which each protein subunit is covalently linked to the target DNA substrate ensures that the recombination event will not damage the DNA. The previous structure of a tetrameric synaptic complex of γδ resolvase linked to two cleaved DNA strands had suggested a rotational mechanism of recombination in which one dimer rotates 180° about the flat exchange interface for strand exchange. Here, we report the crystal structure of a synaptic tetramer of an unliganded activated mutant (M114V) of the G-segment invertase (Gin) in which one dimer half is rotated by 26° or 154° relative to the other dimer when compared with the dimers in the synaptic complex of γδ resolvase. Modeling shows that this rotational orientation of Gin is not compatible with its being able to bind uncleaved DNA, implying that this structure represents an intermediate in the process of strand exchange. Thus, our structure provides direct evidence for the proposed rotational mechanism of site-specific recombination.


    Organizational Affiliation

    Department of Molecular Biophysics and Biochemistry, Department of Chemistry and Howard Hughes Medical Institute, Yale University, New Haven, CT 06520, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DNA-invertase
X
193Enterobacteria phage MuGene Names: gin
EC: 6.5.1.-, 3.1.22.-
Find proteins for P03015 (Enterobacteria phage Mu)
Go to UniProtKB:  P03015
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.51 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.257 
  • Space Group: P 62 2 2
Unit Cell:
Length (Å)Angle (°)
a = 116.840α = 90.00
b = 116.840β = 90.00
c = 117.640γ = 120.00
Software Package:
Software NamePurpose
SOLVEphasing
ADSCdata collection
XDSdata scaling
REFMACrefinement
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-12-05
    Type: Initial release
  • Version 1.1: 2013-05-22
    Type: Database references