4U7B

Crystal structure of a pre-cleavage Mos1 transpososome


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.09 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.228 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural role of the flanking DNA in mariner transposon excision.

Dornan, J.Grey, H.Richardson, J.M.

(2015) Nucleic Acids Res. 43: 2424-2432

  • DOI: 10.1093/nar/gkv096

  • PubMed Abstract: 
  • During cut-and-paste mariner/Tc1 transposition, transposon DNA is cut precisely at its junction with flanking DNA, ensuring the transposon is neither shortened nor lengthened with each transposition event. Each transposon end is flanked by a TpA dinu ...

    During cut-and-paste mariner/Tc1 transposition, transposon DNA is cut precisely at its junction with flanking DNA, ensuring the transposon is neither shortened nor lengthened with each transposition event. Each transposon end is flanked by a TpA dinucleotide: the signature target site duplication of mariner/Tc1 transposition. To establish the role of this sequence in accurate DNA cleavage, we have determined the crystal structure of a pre-second strand cleavage mariner Mos1 transpososome. The structure reveals the route of an intact DNA strand through the transposase active site before second strand cleavage. The crossed architecture of this pre-second strand cleavage paired-end complex supports our proposal that second strand cleavage occurs in trans. The conserved mariner transposase WVPHEL and YSPDL motifs position the strand for accurate DNA cleavage. Base-specific recognition of the flanking DNA by conserved amino acids is revealed, defining a new role for the WVPHEL motif in mariner transposition and providing a molecular explanation for in vitro mutagenesis data. Comparison of the pre-TS cleavage and post-cleavage Mos1 transpososomes with structures of Prototype Foamy Virus intasomes suggests a binding mode for target DNA prior to Mos1 transposon integration.


    Organizational Affiliation

    Institute of Structural and Molecular Biology, School of Biological Sciences, University of Edinburgh, The King's Buildings, Max Born Crescent, Edinburgh EH9 3BF, UK.,Institute of Structural and Molecular Biology, School of Biological Sciences, University of Edinburgh, The King's Buildings, Max Born Crescent, Edinburgh EH9 3BF, UK julia.richardson@ed.ac.uk.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Mariner Mos1 transposase
A, B, G
342Drosophila mauritianaMutation(s): 0 
Gene Names: mariner\T
EC: 3.1.-.-
Find proteins for Q7JQ07 (Drosophila mauritiana)
Go to UniProtKB:  Q7JQ07
Entity ID: 1
MoleculeChainsLengthOrganism
DNA (25-MER)C,E,H25Drosophila mauritiana
Entity ID: 2
MoleculeChainsLengthOrganism
DNA (31-MER)D,F,I31Drosophila mauritiana
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
C, D, E
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.09 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.228 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 96.471α = 90.00
b = 340.090β = 90.00
c = 160.360γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
PHASERphasing
MOSFLMdata reduction
iMOSFLMdata reduction
PDB_EXTRACTdata extraction
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data

  • Deposited Date: 2014-07-30 
  • Released Date: 2015-02-11 
  • Deposition Author(s): Richardson, J.M.

Funding OrganizationLocationGrant Number
Wellcome TrustUnited Kingdom085176/Z/08/Z

Revision History 

  • Version 1.0: 2015-02-11
    Type: Initial release
  • Version 1.1: 2015-02-25
    Type: Database references
  • Version 1.2: 2015-03-11
    Type: Database references