Belongs to the DNA polymerase type-Y family.
Poorly processive, error-prone DNA polymerase involved in untargeted mutagenesis. Copies undamaged DNA at stalled replication forks, which arise in vivo from mismatched or misaligned primer ends. These misaligned primers can be extended by PolIV. Exhibits no 3'-5' exonuclease (proofreading) activity. May be involved in translesional synthesis, in conjunction with the beta clamp from PolIII.
Abolishes the inhibitory effect of tetracyclin on protein synthesis by a non-covalent modification of the ribosomes.
Belongs to the 'phage' integrase family.
Site-specific tyrosine recombinase, which acts by catalyzing the cutting and rejoining of the recombining DNA molecules.