1A0I image
Deposition Date 1997-12-01
Release Date 1998-03-25
Last Version Date 2024-02-07
Entry Detail
PDB ID:
1A0I
Keywords:
LIGASE
Title:
ATP-DEPENDENT DNA LIGASE FROM BACTERIOPHAGE T7 COMPLEX WITH ATP
Biological Source:
Source Organism:
Enterobacteria phage T7 (Taxon ID: 10760)
Host Organism:
Escherichia coli
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.60 Å
R-Value Free:
0.34
R-Value Work:
0.22
R-Value Observed:
0.22
Space Group:
P 21 21 2
1A0I validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA LIGASE
Gene (Uniprot):1.3
Mutations:M2V
Chain IDs:A
Chain Length:348
Number of Molecules:1
Biological Source:Enterobacteria phage T7
UniProt ID:P00969 Pfam ID:PF01068, PF17879 EC:6.5.1.1
Ligand Molecules
ATP
Primary Citation
Crystal structure of an ATP-dependent DNA ligase from bacteriophage T7.
Cell(Cambridge,Mass.) 85 607 615 (1996)
PMID: 8653795 DOI: 10.1016/S0092-8674(00)81260-X

Abstact

The crystal structure of the ATP-dependent DNA ligase from bacteriophage T7 has been solved at 2.6 A resolution. The protein comprises two domains with a deep cleft running between them. The structure of a complex with ATP reveals that the nucleotide binding pocket is situated on the larger N-terminal domain, at the base of the cleft between the two domains of the enzyme. Comparison of the overall domain structure with that of DNA methyltransferases, coupled with other evidence, suggests that DNA also binds in this cleft. Since this structure is the first of the nucleotidyltransferase superfamily, which includes the eukaryotic mRNA capping enzymes, the relationship between the structure of DNA ligase and that of other nucleotidyltransferases is also discussed.

Legend

Protein

Chemical

Disease

Primary Citation of related structures
1A0I