4R79

Mos1 transposase paired-end complex with left transposon end


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.229 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structural Basis for the Inverted Repeat Preferences of mariner Transposases.

Trubitsyna, M.Grey, H.Houston, D.R.Finnegan, D.J.Richardson, J.M.

(2015) J Biol Chem 290: 13531-13540

  • DOI: https://doi.org/10.1074/jbc.M115.636704
  • Primary Citation of Related Structures:  
    4R79

  • PubMed Abstract: 

    The inverted repeat (IR) sequences delimiting the left and right ends of many naturally active mariner DNA transposons are non-identical and have different affinities for their transposase. We have compared the preferences of two active mariner transposases, Mos1 and Mboumar-9, for their imperfect transposon IRs in each step of transposition: DNA binding, DNA cleavage, and DNA strand transfer. A 3.1 Å resolution crystal structure of the Mos1 paired-end complex containing the pre-cleaved left IR sequences reveals the molecular basis for the reduced affinity of the Mos1 transposase DNA-binding domain for the left IR as compared with the right IR. For both Mos1 and Mboumar-9, in vitro DNA transposition is most efficient when the preferred IR sequence is present at both transposon ends. We find that this is due to the higher efficiency of cleavage and strand transfer of the preferred transposon end. We show that the efficiency of Mboumar-9 transposition is improved almost 4-fold by changing the 3' base of the preferred Mboumar-9 IR from guanine to adenine. This preference for adenine at the reactive 3' end for both Mos1 and Mboumar-9 may be a general feature of mariner transposition.


  • Organizational Affiliation

    From the Institute of Cell Biology and.


Macromolecules

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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Mariner Mos1 transposaseG [auth A],
H [auth B]
345Drosophila mauritianaMutation(s): 5 
Gene Names: mariner\TT
EC: 3.1
UniProt
Find proteins for Q7JQ07 (Drosophila mauritiana)
Explore Q7JQ07 
Go to UniProtKB:  Q7JQ07
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ7JQ07
Sequence Annotations
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  • Reference Sequence

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Entity ID: 1
MoleculeChains LengthOrganismImage
left Inverted repeat NTSA [auth C],
C [auth E],
E [auth G]
25synthetic construct
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains LengthOrganismImage
left Inverted repeat TSB [auth D],
D [auth F]
28synthetic construct
Sequence Annotations
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  • Reference Sequence
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Entity ID: 3
MoleculeChains LengthOrganismImage
left Inverted repeat NTS HF [auth H]27synthetic construct
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.229 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 119.783α = 90
b = 86.885β = 99.03
c = 132.379γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALEPACKdata scaling
PHASERphasing
DMphasing
REFMACrefinement
PDB_EXTRACTdata extraction
ADSCdata collection

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-04-22
    Type: Initial release
  • Version 1.1: 2015-06-10
    Changes: Database references
  • Version 1.2: 2023-09-20
    Changes: Data collection, Database references, Derived calculations, Refinement description
  • Version 1.3: 2024-10-16
    Changes: Structure summary