Protein
Methyltransferase Dmt
Organism
Escherichia phage P1
Function
Methyltransferase that methylates adenine residues in the dsDNA sequence GATC. Essential for genome packaging because it methylates GATC sequences within the pac site making the latter cleavable (PubMed:3312202, PubMed:2236019). May prevent degradation of viral DNA by the host restriction-modification antiviral defense system (PubMed:376871).
Similarity
Belongs to the class I-like SAM-binding methyltransferase superfamily. C5-methyltransferase family.
Sequence
MKELCYGSVCSGIEAASIAWEPLGMRPAWFAEIEPFPSAVLAHRWPHVANLGDMTKLAKKVLAGEIESPDVLVWGTPCQAFSIAGLRGGLDDERGALTLKYVELANAIDDKRSESFLKPTVIVWENVPGVLSSADNAFGCFLAGLAGEDAPFEPGDRPESGKSNAFWRWDGKTGCHAPKWPQCGCIYGPQRKVAWRILDAQYFGVAQRRRRVFVVASARTDLDPATVLFEFEGVRRNIAPRRKKKEIASAIIANGAAISGESLNPCLHADMPPSMKSTKAVNAFRMAAFGEYIDDETASTVKARDFKDATDLAVFSSTGAGFWSEGHGTLRAREQESHEHLVTLAFPERMSGTQHAATKNTSPSLMAKNPTAVCYEVRNAEVAVRRLTPVECERLQGFPDGHTLIPTEKRKKVNSDELAYLRNHYPDLSEEEAAMLAADGPRYKAIGNSMAIPVMRWIGDRITKAVCRQKEGSETKERKVKPAAEFERSIFKWAGGKFGVLEQIFRYLPEGKRLIEPFVGGGAVFTNAGYQENLLNDVNADLINFYKTLQREAHSLITLAHRFFQDYNTQEGYLAVRNAFNKQVYDDLHRAAAFLFLNRHCFNGLTRYNQAGEFNVGYGKYKTPYFPLQEMEAFLGAEGRSEFVCGDFAAVIEAAGEGDVIFCDPPYEPLPNTEGFTNYSGHDFKFEEQKRLVSLLTDAHRRGAKVLITNSGAPNIRELYHDSGFRVEPLFARRSVSCKGDTRGVAHDVLGILL