Bacteriophage T4, Gp32, single-stranded DNA-binding (IPR012339)

Short name: Phage_T4_Gp32_ssDNA-bd

Overlapping homologous superfamilies

Domain relationships



This entry is represented by the Bacteriophage T4, Gp32, single-stranded DNA-binding protein. The characteristics of the protein distribution suggest prophage matches in addition to the phage matches.

Gp32 is essential for T4 DNA replication, recombination and repair, acting to stimulate replisome processing and accuracy through its binding to ssDNA as the replication fork advances. The crystal structure of Gp32 shows an ssDNA binding cleft comprised of regions from three structural subdomains, through which ssDNA can slide freely [PMID: 7630406]. The structure of Gp32 is similar to other phage ssDNA-binding proteins such as Gp2.5 from bacteriophage T4, and gene V protein, both of which have a nucleic acid-binding OB-type fold. However, Gp32 contains a zinc-finger subdomain at residues 63-111 that is not found in the other two phage proteins.

GO terms

Biological Process

No terms assigned in this category.

Molecular Function

GO:0003697 single-stranded DNA binding

Cellular Component

No terms assigned in this category.

Contributing signatures

Signatures from InterPro member databases are used to construct an entry.