Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 125.42 kDa 
• Atom Count: 8490 
• Modelled Residue Count: 813 
• Deposited Residue Count: 832 
• Unique protein chains: 1
• Unique nucleic acid chains: 3

5HOO

Crystal structure of the Mos1 Strand Transfer Complex

• PDB DOI: 10.2210/pdb5HOO/pdb
• NDB: 5HOO

• Classification: DNA
• Organism(s): Drosophila mauritiana, synthetic construct
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 


• Deposited: 2016-01-19 Released: 2016-06-01 
• Deposition Author(s): Richardson, J.M., Morris, E.R.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.30 Å
• R-Value Free: 0.274 
• R-Value Work: 0.232 
• R-Value Observed: 0.234 

Literature

A bend, flip and trap mechanism for transposon integration.

Morris, E.R., Grey, H., McKenzie, G., Jones, A.C., Richardson, J.M.

(2016) Elife 5

• PubMed: 27223327 
• DOI: 10.7554/eLife.15537
• Primary Citation of Related Structures:  
  5HOO


• PubMed Abstract: 
  

Cut-and-paste DNA transposons of the mariner/Tc1 family are useful tools for genome engineering and are inserted specifically at TA target sites. A crystal structure of the mariner transposase Mos1 (derived from Drosophila mauritiana), in complex with transposon ends covalently joined to target DNA, portrays the transposition machinery after DNA integration. It reveals severe distortion of target DNA and flipping of the target adenines into extra-helical positions. Fluorescence experiments confirm dynamic base flipping in solution. Transposase residues W159, R186, F187 and K190 stabilise the target DNA distortions and are required for efficient transposon integration and transposition in vitro. Transposase recognises the flipped target adenines via base-specific interactions with backbone atoms, offering a molecular basis for TA target sequence selection. Our results will provide a template for re-designing mariner/Tc1 transposases with modified target specificities.

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Organizational Affiliation: 

Institute of Quantitative Biology, Biochemistry and Biotechnology, University of Edinburgh, Edinburgh, United Kingdom.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Mariner Mos1 transposase	A, B	345	Drosophila mauritiana	Mutation(s): 1  Gene Names: mariner, mariner\T EC: 3.1
UniProt
Find proteins for Q7JQ07 (Drosophila mauritiana) Explore Q7JQ07  Go to UniProtKB:  Q7JQ07

Entity ID: 2
Molecule	Chains	Length	Organism	Image
Mos1 IR DNA NTS	C, E	25	synthetic construct

Entity ID: 3
Molecule	Chains	Length	Organism	Image
Mos1 IR TS joined to Target DNA,Mos1 IR TS joined to Target DNA	D, F	36	synthetic construct, Drosophila mauritiana

Entity ID: 4
Molecule	Chains	Length	Organism	Image
Target DNA	G, H	10	synthetic construct

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
MG	I [auth A], J [auth B]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.30 Å
• R-Value Free: 0.274 
• R-Value Work: 0.232 
• R-Value Observed: 0.234 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 256.34	α = 90
b = 58.83	β = 94.91
c = 110.14	γ = 90

Software Package:

Software Name	Purpose
MOSFLM	data reduction
Aimless	data scaling
PHASER	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2016-01-19 
• Released Date: 2016-06-01 
Deposition Author(s): Richardson, J.M., Morris, E.R.

Revision History  

• Version 1.0: 2016-06-01
  Type: Initial release
  
• Version 1.1: 2016-06-08
  Changes: Database references