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Nucleic Acids Research, 1984, Vol. 12, No. 10 4185-4189
© 1984

MOLECULAR BIOLOGY

Sequence and structure of a methionine transfer RNA from mosquito mitochondria

Donald T. Dubin and Chuen Chin HsuChen

Department of Microbiology, University of Medicine and Dentistry of New Jersey, Rutgers Medical School Piscataway, NJ 08854, USA

Received February 20, 1984. Accepted April 17, 1984.

We have sequenced a methionine tRNA from mosquito mitochondria, and examined its structure using nucleases S1 and T1 under non-denaturing conditions. The sequence is highly homologous to a putative initiator methionine tRNA gene from Drosophila mitochondria. Its anticodon stem contains a run of three G-C base pairs that is characteristic of conventional initiator tRNAs; however, nuclease S1 analysis suggested an anticodon loop configuration characteristic of conventional elongator tRNAs. We propose that this tRNA can assume both initiator and elongator roles.


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