Protein Domain : Gene product 79 IPR035353

Type	Family
Description	This is a family of unknown function found in Mycobacterium phages. Family members include the full Gp79 protein found in Mycobacteriophage L5 . Mycobacteriophage L5 is a phage isolated from Mycobacterium smegmatis. It forms stable lysogens in M. smegmatis and has a broad host range among the pathogenic mycobacteria. L5 encodes gene products (gp) toxic to the host M. smegmatis. Expression of gp79 interferes with the cell membrane or cell-wall synthesis of M. smegmatis, leading to altered cell morphology. It also has a bactericidal effect on E. coli. The N-terminal segment of gp79 (amino acids 1-41) shares sequence similarity with the signal peptide of the D-alanyl-D-alanine carboxypeptidase of Bacillus licheniformis. This enzyme removes C-terminal D-alanyl residues from sugarpeptide cell-wall precursors and is also a penicillin-binding protein (PBP). The homology of the hydrophobic N-terminal part of gp79 to a PBP (penicillin-binding protein) signal peptide may indicate an interaction of gp79 with proteins or metabolites involved in the peptidoglycan synthesis of M. smegmatis [ ].
Short Name	Gp79