7-methylguanosine at the anticodon wobble position of squid mitochondrial tRNA(Ser)GCU: Molecular basis for assignment of AGA/AGG codons as serine in invertebrate mitochondria

Kozo Tomita, Takuya Ueda, Kimitsuna Watanabe*

*この研究の対応する著者

研究成果: Article査読

36 被引用数 (Scopus)

抄録

In mitochondria of the squid, Loligo bleekeri, both the AGA and AGG codons are considered to correspond to serine instead of arginine as in the universal genetic code, and its genome encodes a single tRNA(Scr) gene with the anticodon GCT. Therefore, this gene product, tRNA(Ser)GCU, should be able to translate all four AGN (N; U, C, A, and G) codons as serine. To elucidate this recognition mechanism, the tRNA(Ser)GCU was isolated from squid liver and its complete nucleotide sequence determined. The tRNA(Ser)GCU was found to possess 7-methylguanosine (m7G) at the wobble position of the anticodon. This suggests that in the squid mitochondrial system, tRNA(Ser)GCU with the anticodon m7GCU can recognize not only the usual serine codons AGU and AGC, but also the unusual serine codons AGA and AGG, as in the case of starfish mitochondria (Matsuyama et al., J. Biol. Chem. 273 (1988) 3363-3368).

本文言語English
ページ(範囲)78-82
ページ数5
ジャーナルBiochimica et Biophysica Acta - Gene Structure and Expression
1399
1
DOI
出版ステータスPublished - 1998 7 30
外部発表はい

ASJC Scopus subject areas

  • 構造生物学
  • 生物理学
  • 生化学
  • 遺伝学

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