1LWS

Crystal structure of the intein homing endonuclease PI-SceI bound to its recognition sequence

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.50 Å
  • R-Value Free: 0.310 
  • R-Value Work: 0.287 

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This is version 1.2 of the entry. See complete history. 


Literature

Crystal structure of the intein homing endonuclease PI-SceI bound to its recognition sequence.

Moure, C.M., Gimble, F.S., Quiocho, F.A.

(2002) Nat Struct Biol 9: 764-770

  • DOI: 10.1038/nsb840
  • Primary Citation of Related Structures:  
    1LWS, 1LWT

  • PubMed Abstract: 

    • The first X-ray structures of an intein-DNA complex, that of the two-domain homing endonuclease PI-SceI bound to its 36-base pair DNA substrate, have been determined in the presence and absence of Ca(2+). The DNA shows an asymmetric bending pattern, with a major 50 degree bend in the endonuclease domain and a minor 22 degree bend in the splicing domain region ...

    The first X-ray structures of an intein-DNA complex, that of the two-domain homing endonuclease PI-SceI bound to its 36-base pair DNA substrate, have been determined in the presence and absence of Ca(2+). The DNA shows an asymmetric bending pattern, with a major 50 degree bend in the endonuclease domain and a minor 22 degree bend in the splicing domain region. Distortions of the DNA bound to the endonuclease domain cause the insertion of the two cleavage sites in the catalytic center. DNA binding induces changes in the protein conformation. The two overlapping non-identical active sites in the endonucleolytic center contain two Ca(+2) ions that coordinate to the catalytic Asp residues. Structure analysis indicates that the top strand may be cleaved first.

    Related Citations: 
    • Crystal structure of PI-SceI, a homing endonuclease with protein splicing activity
      Duan, X., Gimble, F.S., Quiocho, F.A.
      (1997) Cell 89: 555
    Organizational Affiliation: 

    Howard Hughes Medical Institute, Baylor College of Medicine, Houston, Texas 77030, USA.



Macromolecules

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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
ENDONUCLEASE PI-SCEIC [auth A]454Saccharomyces cerevisiaeMutation(s): 8 
Gene Names: VMA1
EC: 3.1 (PDB Primary Data), 7.1.2.2 (UniProt)
UniProt
Find proteins for P17255 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P17255 
Go to UniProtKB:  P17255
Protein Feature View
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  • Reference Sequence
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsLengthOrganismImage
PI-SceI DNA recognition region top strandA [auth B]37N/A
Protein Feature View
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  • Reference Sequence
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(by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsLengthOrganismImage
PI-SceI DNA recognition region bottom strandB [auth C]37N/A
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA
Download Ideal Coordinates CCD File 
 D [auth A], E [auth A]CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N		 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE		C [auth A]L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.50 Å
  • R-Value Free: 0.310 
  • R-Value Work: 0.287 
  • Space Group: P 65 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 123α = 90
b = 123β = 90
c = 211.7γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
CNSrefinement
CNSphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-09-27
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance