1BP7

GROUP I MOBILE INTRON ENDONUCLEASE I-CREI COMPLEXED WITH HOMING SITE DNA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.234 

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This is version 1.2 of the entry. See complete history


Literature

DNA recognition and cleavage by the LAGLIDADG homing endonuclease I-CreI.

Jurica, M.S.Monnat Jr., R.J.Stoddard, B.L.

(1998) Mol Cell 2: 469-476

  • DOI: 10.1016/s1097-2765(00)80146-x
  • Primary Citation of Related Structures:  
    1BP7

  • PubMed Abstract: 
  • The structure of the LAGLIDADG intron-encoded homing endonuclease I-CreI bound to homing site DNA has been determined. The interface is formed by an extended, concave beta sheet from each enzyme monomer that contacts each DNA half-site, resulting in direct side-chain contacts to 18 of the 24 base pairs across the full-length homing site ...

    The structure of the LAGLIDADG intron-encoded homing endonuclease I-CreI bound to homing site DNA has been determined. The interface is formed by an extended, concave beta sheet from each enzyme monomer that contacts each DNA half-site, resulting in direct side-chain contacts to 18 of the 24 base pairs across the full-length homing site. The structure indicates that I-CreI is optimized to its role in genetic transposition by exhibiting long site-recognition while being able to cleave many closely related target sequences. DNA cleavage is mediated by a compact pair of active sites in the I-CreI homodimer, each of which contains a separate bound divalent cation.


    Organizational Affiliation

    Fred Hutchinson Cancer Research Center, University of Washington, Seattle, Washington 98109, USA.



Macromolecules

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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEIN (I-CREI)E [auth A], F [auth B], G [auth C], H [auth D]152Chlamydomonas reinhardtiiMutation(s): 0 
EC: 3.1
UniProt
Find proteins for P05725 (Chlamydomonas reinhardtii)
Explore P05725 
Go to UniProtKB:  P05725
Protein Feature View
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  • Reference Sequence
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Entity ID: 1
MoleculeChainsLengthOrganismImage
DNA (5'-D(*GP*CP*AP*AP*AP*AP*CP*GP*TP*CP*GP*TP*GP*AP*GP*AP*CP*AP*GP*TP*TP*TP* CP*G)-3')A [auth 1], C [auth 3]24N/A
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsLengthOrganismImage
DNA (5'-D(*CP*GP*AP*AP*AP*CP*TP*GP*TP*CP*TP*CP*AP*CP*GP*AP*CP*GP*TP*TP*TP*TP* GP*C)-3')B [auth 2], D [auth 4]24N/A
Protein Feature View
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.234 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 67.556α = 90
b = 89.259β = 90
c = 177.516γ = 90
Software Package:
Software NamePurpose
EPMRphasing
X-PLORrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1999-01-06
    Type: Initial release
  • Version 1.1: 2008-05-22
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance