3R7P image
Deposition Date 2011-03-22
Release Date 2011-07-20
Last Version Date 2023-09-13
Entry Detail
PDB ID:
3R7P
Keywords:
Title:
The crystal structure of I-LtrI
Biological Source:
Source Organism:
Leptographium truncatum (Taxon ID: 330483)
(Taxon ID: )
Host Organism:
Method Details:
Experimental Method:
Resolution:
2.70 Å
R-Value Free:
0.26
R-Value Work:
0.19
R-Value Observed:
0.19
Space Group:
C 1 2 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Ribosomal protein 3/homing endonuclease-like fusion protein
Gene (Uniprot):HEG fusion
Chain IDs:A
Chain Length:315
Number of Molecules:1
Biological Source:Leptographium truncatum
Polymer Type:polydeoxyribonucleotide
Molecule:DNA (5'-D(*GP*GP*TP*CP*TP*AP*AP*AP*CP*GP*TP*CP*GP*TP*AP*T)-3')
Chain IDs:B
Chain Length:16
Number of Molecules:1
Biological Source:
Polymer Type:polydeoxyribonucleotide
Molecule:DNA (5'-D(P*AP*GP*GP*AP*GP*CP*AP*TP*TP*TP*G)-3')
Chain IDs:C
Chain Length:11
Number of Molecules:1
Biological Source:
Polymer Type:polydeoxyribonucleotide
Molecule:DNA (5'-D(*CP*AP*AP*AP*TP*GP*CP*TP*CP*CP*TP*AP*TP*AP*C)-3')
Chain IDs:D
Chain Length:15
Number of Molecules:1
Biological Source:
Polymer Type:polydeoxyribonucleotide
Molecule:DNA (5'-D(P*GP*AP*CP*GP*TP*TP*TP*AP*GP*AP*CP*C)-3')
Chain IDs:E
Chain Length:12
Number of Molecules:1
Biological Source:
Primary Citation
Tapping natural reservoirs of homing endonucleases for targeted gene modification.
Proc.Natl.Acad.Sci.USA 108 13077 13082 (2011)
PMID: 21784983 DOI: 10.1073/pnas.1107719108

Abstact

Homing endonucleases mobilize their own genes by generating double-strand breaks at individual target sites within potential host DNA. Because of their high specificity, these proteins are used for "genome editing" in higher eukaryotes. However, alteration of homing endonuclease specificity is quite challenging. Here we describe the identification and phylogenetic analysis of over 200 naturally occurring LAGLIDADG homing endonucleases (LHEs). Biochemical and structural characterization of endonucleases from one clade within the phylogenetic tree demonstrates strong conservation of protein structure contrasted against highly diverged DNA target sites and indicates that a significant fraction of these proteins are sufficiently stable and active to serve as engineering scaffolds. This information was exploited to create a targeting enzyme to disrupt the endogenous monoamine oxidase B gene in human cells. The ubiquitous presence and diversity of LHEs described in this study may facilitate the creation of many tailored nucleases for genome editing.

Legend

Protein

Chemical

Disease

Primary Citation of related structures