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Nucleic Acids Research, 1982, Vol. 10, No. 24 7919-7934
© 1982

MOLECULAR BIOLOGY

Sequences of four tRNA genes from Caenorhabditis elegans and the espression of C.elegans tRNA Leu (anticodon IAG) in Xenopus oocytes

T. A. Tranquilla, R. Cortese*, D. Melton+ and J. D. Smith

Laboratory of Molecular Biology, Medical Research Council Centre Hills Road, Cambridge CB2 2QH, UK

Received November 2, 1982. Accepted November 25, 1982.

Four tRNA genes have been identified in cloned segments of Caenorhabditis elegans DNA by tRNA hybridization and expression after injection into Xenopus laevis oocyte nuclei. From DNA sequencing these are (with DNA anticodon sequences) tRNAAsp (CTC), tRNALeu (AAC), tRNA Lys (CTT) and tRNA Pro(TGG). Their flanking DNA sequences are compared. Two identical tRNA Lys (CTT) genes from different regions of the genome have quite unrelated 5‘ flanking sequences the tRNA synthesized in Xenopus oocytes after injection of the tRNALeu cloned DNA has the modified anticodon JAG. The tRNALeu gene precursor transcript from injected oocytes has short 5‘ and 3‘ additional sequences and Jacks certain of those modified bases found in the processed tRNA.

*Present address: European Molecular Biology Laboratory, Heidelbreg, FRG

+Present address: Department of Biochemistry and Molecualr Biology, Harvard University, Cambridge, MA 04151, USA


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