1BP7 image
Deposition Date 1998-08-13
Release Date 1999-01-06
Last Version Date 2023-08-02
Entry Detail
PDB ID:
1BP7
Keywords:
TRANSCRIPTION/DNA
Title:
GROUP I MOBILE INTRON ENDONUCLEASE I-CREI COMPLEXED WITH HOMING SITE DNA
Biological Source:
Source Organism:
Chlamydomonas reinhardtii (Taxon ID: 3055)
Host Organism:
Escherichia coli
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
3.00 Å
R-Value Free:
0.28
R-Value Work:
0.23
Space Group:
P 21 21 21
1BP7 validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:PROTEIN (I-CREI)
Chain IDs:E (auth: A), F (auth: B), G (auth: C), H (auth: D)
Chain Length:152
Number of Molecules:4
Biological Source:Chlamydomonas reinhardtii
UniProt ID:P05725 Pfam ID:PF00961
Ligand Molecules
CA
Primary Citation
DNA recognition and cleavage by the LAGLIDADG homing endonuclease I-CreI.
Mol.Cell 2 469 476 (1998)
PMID: 9809068 DOI: 10.1016/S1097-2765(00)80146-X

Abstact

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.

Legend

Protein

Chemical

Disease

Primary Citation of related structures
1BP7