EVOLUTION OF TRANSFER-RNAS AND TRANSFER-RNA GENES IN ACHOLEPLASMA-LAIDLAWII

被引：17

作者：

TANAKA, R ^{[1
]}

ANDACHI, Y ^{[1
]}

MUTO, A ^{[1
]}

机构：

[1] NAGOYA UNIV,SCH SCI,DEPT BIOL,FURO CHO,CHIKUSA KU,NAGOYA 46401,JAPAN

来源：

NUCLEIC ACIDS RESEARCH | 1991年 / 19卷 / 24期

关键词：

D O I：

10.1093/nar/19.24.6787

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

The genes for 22 tRNA species from Acholeplasma laidlawii, belonging to the class Mollicutes (Mycoplasmas), have been cloned and sequenced. Sixteen genes are organized in 3 clusters consisting of eleven, three and two tRNA genes, respectively, and the other 6 genes exist as a single gene. The arrangement of tRNA genes in the 11-gene, the 3-gene and the 2-gene clusters reveals extensive similarity to several parts of the 21-tRNA or 16-tRNA gene cluster in Bacillus subtilis. The 11-gene cluster is also similar to the tRNA gene clusters found in other mycoplasma species, the 9-tRNA gene cluster in M. capricolum and in M. mycoides, and the 10-tRNA gene cluster in Spiroplasma meliferm. The results suggest that the tRNA genes in mycoplasmas have evolved from large tRNA gene clusters in the ancestral Gram-positive bacterial genome common to mycoplasmas and B. subtilis. The anticodon sequences including base modifications of 15 tRNA species from A. laidlawii were determined. The anticodon composition and codon-recognition patterns of A. laidlawii resemble those of Bacillus subtilis rather than those of other mycoplasma species.

引用

页码：6787 / 6792

页数：6

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