pfam06805: Lambda_tail_I (This model is not part of the current CDD release)
Bacteriophage lambda tail assembly protein I
This family consists of tail assembly proteins from lambdoid and T1 phages and related prophages, e.g. the tail assembly protein I (TAPI). Members of this family contain a core ubiquitin fold domain . The exact function of TAPI is not clear but it is not incorporated into the mature tail. Gene neighborhoods reveal that TAPI co-occurs with genes encoding the host-specificity protein TapJ, and TapK, which contains a JAB metallopeptidase fused to an NlpC/P60 peptidase. It is proposed that the TAPI protein is processed by the peptidase domains of TapK.
Jiyao W et al.(2023). "The conserved domain database in 2023.",