1AF5

GROUP I MOBILE INTRON ENDONUCLEASE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.373 
  • R-Value Work: 0.248 
  • R-Value Observed: 0.248 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

The structure of I-Crel, a group I intron-encoded homing endonuclease.

Heath, P.J.Stephens, K.M.Monnat Jr., R.J.Stoddard, B.L.

(1997) Nat Struct Biol 4: 468-476

  • DOI: 10.1038/nsb0697-468
  • Primary Citation of Related Structures:  
    1AF5

  • PubMed Abstract: 
  • The structure of I-Crel provides the first view of a protein encoded by a gene within an intron. This endonuclease recognizes a long DNA site approximately 20 base pairs in length and facilitates the lateral transfer of that intron. The protein exhibits a DNA-binding surface consisting of four antiparallel beta-strands that form a 20 A wide groove which is over 70 A long ...

    The structure of I-Crel provides the first view of a protein encoded by a gene within an intron. This endonuclease recognizes a long DNA site approximately 20 base pairs in length and facilitates the lateral transfer of that intron. The protein exhibits a DNA-binding surface consisting of four antiparallel beta-strands that form a 20 A wide groove which is over 70 A long. The architecture of this fold is different from that of the TATA binding protein, TBP, which also contains an antiparallel beta-saddle. The conserved LAGLIDADG motif, which is found in many mobile intron endonucleases, maturases and inteins, forms a novel helical interface and contributes essential residues to the active site.


    Organizational Affiliation

    Fred Hutchinson Cancer Research Center, Division of Basic Sciences, Seattle, Washington 98104, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
I-CREIA135Chlamydomonas reinhardtiiMutation(s): 1 
EC: 3.1
UniProt
Find proteins for P05725 (Chlamydomonas reinhardtii)
Explore P05725 
Go to UniProtKB:  P05725
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP05725
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.373 
  • R-Value Work: 0.248 
  • R-Value Observed: 0.248 
  • Space Group: P 3 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 78.2α = 90
b = 78.2β = 90
c = 67.4γ = 120
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1997-07-23
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2021-11-03
    Changes: Database references, Other