Preparation of biologically active Ascaris suum mitochondrial tRNAMet with a TV-replacement loop by ligation of chemically synthesized RNA fragments

Takashi Ohtsuki, Gota Kawai, Yoh Ichi Watanabe, Kiyoshi Kita, Kazuya Nishikawa, Kimitsuna Watanabe

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)


Ascaris suum mitochondrial tRNAMet lacking the entire T stem was prepared by enzymatic ligation of two chemically synthesized RNA fragments. The synthetic tRNA could be charged with methionine by A.suum mitochondrial extract, although the charging activity was considerably low compared with that of the native tRNA, probably due to lack of modification. Enzymatic probing of the synthetic tRNA showed a very similar digestion pattern to that of the native tRNAMet, which has already been concluded to take an L-shape-like structure [Watanabe et al. (1994) J. Biol. Chem., 269, 22902-22906]. These results suggest that the synthetic tRNA possesses almost the same conformation as the native one, irrespective of the presence or absence of modified residues. The method of preparing the bizarre tRNA used here will provide a useful tool for elucidating the tertiary structure of such tRNAs, because they can be obtained without too much difficulty in the amounts necessary for physicochemical studies such as NMR spectroscopy.

Original languageEnglish
Pages (from-to)662-667
Number of pages6
JournalNucleic acids research
Issue number4
Publication statusPublished - 1996
Externally publishedYes

ASJC Scopus subject areas

  • Genetics


Dive into the research topics of 'Preparation of biologically active Ascaris suum mitochondrial tRNA<sup>Met</sup> with a TV-replacement loop by ligation of chemically synthesized RNA fragments'. Together they form a unique fingerprint.

Cite this