Peptidoglycan hydrolase gp4

UniProtKB accession:  P26746

Grouped By:  Matching UniProtKB accession

UniProtKB description:  Tail protein located at the vertex occupied by the portal ring. 12 copies of gp4 form a structural ring at the bottom of the portal ring. Together with gp10 and gp26, gp4 is required for stabilization of the condensed DNA within the capsid; perhaps by plugging the hole through which the DNA enters. Probably functions as a head completion protein. Plays a role in ejection of the bacteriophage DNA into the host cell at the initiation of infection. Functions as an exolysin that catalyzes the cleavage of the glycosidic bonds between N-acetylmuramic acid and N-acetylglucosamine residues in peptidoglycans.