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. 1980 Dec;144(3):991–998. doi: 10.1128/jb.144.3.991-998.1980

Methylation patterns of mycoplasma transfer and ribosomal ribonucleic acid.

C C Hsuchen, D T Dubin
PMCID: PMC294762  PMID: 6160144

Abstract

The methylation patterns of transfer and ribosomal ribonucleic acid (RNA) from two mycoplasmas, Mycoplasma capricolum and Acholeplasma laidlawii, have been examined. The transfer RNA from the two mycoplasmas resembled that of other procaryotes in degree of methylation and general diversity of methylated nucleotides, and bore particular resemblance to Bacillus subtilis transfer RNA. The only unusual feature was the absence of m5U from M. capricolum transfer RNA. The methylation patterns of the mycoplasma 16S RNAs were also typically procaryotic, retaining the methylated residues previously shown to be highly conserved among eubacterial 16S RNAs. The mycoplasma 23S RNA methylation patterns were, on the other hand, quite unusual. M. capricolum 23S RNA contained only four methylated residues in stoichiometric amounts, all of which were ribose methylated. A. laidlawii 23S RNA contained the same ribose-methylated residues, plus in addition approximately six m5U residues. These findings are discussed in relation to the phylogenetic status of mycoplasma, as well as the possible role of RNA methylation.

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Selected References

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