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Nucleic Acids Research, 1980, Vol. 8, No. 5 999-1008
© 1980

Articles

The nucleotide sequences of the initiator transfer RNAs from bean cytoplasm and chloroplasts

Jean Canaday, Pierre Guillemaut and Jacques-Henry Weil

Institut de Biologie Moléculaire et Cellulaire du CNRS 15 rue Descartes, 67084 Strasbourg Cedex, France

Received December 11, 1979. The initiator tRNAsMet from the cytoplasm and chloroplasts of Phaseolus vulgaris have been purified and sequenced.

The sequence of bean oytoplasmic initiatortRNAsiMet is : pA-U-C-A-G-A-G-U-m1G-m2G-C-G-C-A-G-C-G-G-A-A-G-C-G-U-m2G-G-V-G-G-G-C-C-C-A-V-t6A-A-C-C-C-A-C-A-G-m7G-D-m5C-C-C-A-G-G-A-{psi}-C-G-m1-A-A-C-C-U-Gm-G-C-U-C-U-G-A-U-A-C-C-AOH. The sequence of bean cytoplasmic tRNAiMet is almost identical to that of wheat germ and shows a high degree of homology with other cytoplasmic initiator tRNAs.

The sequence of bean chloroplast initiator tRSAfMet is : pC-G-C-G-G-A-G-U-A-G-A-G-C-A-A-C-U-U-Gm-G-D-A-G-C-V-C-G-C-A-A-G-G-C-U-C-A-U-A-A-C-C-U-U-G-A-A-m7G-acp3U-U-A-C-G-G-G-T-{psi}-C-A-A-A-U-C-C-C-G-U-C-U-C-C-G-C-A-A-C-C-AOH. Bean chloroplast initiator tRSAfMet sequence shows procaryotic characteristics at the 5' end of the acceptor stem and in the T{psi}C loop, but also contains some distinctive features.


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