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ArpU family phage packaging/lysis transcriptional regulator
This HMM represents a family of phage proteins, including ArpU, called a putative autolysin regulatory protein. ArpU was described as a regulator of cellular muramidase-2 of Enterococcus hirae but appears to have been cloned from a prophage. This family appears related to the RinA family of bacteriophage transcriptional activators and to some sporulation-specific sigma factors. Later work suggested multiple members of the family are regulators of phage morphogenetic and lysis genes, expressed late in the phage lysis cascade, and that the family be named Ltr (late transcriptional regulator).
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