This entry represents an N-terminal OB-fold domain found in the putative RNA-ligase PHA02142. DNA ligases and RNA capping enzymes have a shared core domain structure in which a conserved OB-fold domain is linked to the C-terminus of the NTase domain [1].

1: Structure and two-metal mechanism of a eukaryal nick-sealing RNA ligase. Unciuleac MC, Goldgur Y, Shuman S; Proc Natl Acad Sci U S A. 2015;112:13868-13873. PMID:26512110

2: Caveat mutator: alanine substitutions for conserved amino acids in RNA ligase elicit unexpected rearrangements of the active site for lysine adenylylation. Unciuleac MC, Goldgur Y, Shuman S; Nucleic Acids Res. 2020;48:5603-5615. PMID:32315072