title: tRNA recognition by CCA-adding enzyme.
abstract: The CCA-adding enzyme [ATP (CTP): tRNA nucleotidyltransferase (EC. 2.7.7.25)] catalyzes the addition of the conserved CCA sequence to the 3'-terminus of tRNAs. It is known that CCA-adding enzymes from all three kingdoms recognize the elbow region of L-shape tRNA formed by the tertiary interaction between T-loop and D-loop. We here demonstrate that C. elegans mitochondrial CCA-adding enzyme has broad substrate specificity toward nematode mitochondrial tRNAs which lack entire T- or D-arms, by cloning and characterizing the recombinant protein.
authors.affiliation: Department of Chemistry & Biotechnology, Graduate School of Engineering, University of Tokyo, Japan.
authors.forename: Yukihide
authors.initials: Y
authors.lastname: Tomari
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Suzuki
authors.forename: Takuya
authors.initials: T
authors.lastname: Ueda
mesh_terms: D000818:Animals; D001483:Base Sequence; D017173:Caenorhabditis elegans / Q000201:enzymology; D009690:Nucleic Acid Conformation; D012316:RNA Nucleotidyltransferases / Q000378:metabolism*; D012343:RNA, Transfer / Q000737:chemistry / Q000378:metabolism*; D013379:Substrate Specificity
chemical_list: D012343:RNA, Transfer; D012316:RNA Nucleotidyltransferases; C023198:tRNA nucleotidyltransferase