The function of TMLHE (trimethyllysine hydroxylase, epsilon, ENSG00000185973) is as follows. Converts trimethyllysine (TML) into hydroxytrimethyllysine (HTML) in the carnitine biosynthesis pathway. {ECO:0000269|PubMed:11431483, ECO:0000269|PubMed:15754339, ECO:0000269|PubMed:23092983, ECO:0000269|PubMed:27965989, ECO:0000269|PubMed:28045275}. [Isoform 2]: Lacks trimethyllysine dioxygenase activity. . [Isoform 3]: Lacks trimethyllysine dioxygenase activity. . [Isoform 4]: Lacks trimethyllysine dioxygenase activity. . [Isoform 5]: Lacks trimethyllysine dioxygenase activity. .