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Nucleic Acids Research, 1990, Vol. 18, No. 19 5837-5841
© 1990

MOLECULAR BIOLOGY

A new gene nested within the dunce genetic unit of Drosophila melanogaster

Maria Furia1,2,*, Filomena A. Digilio2, Dora Artiaco2, Ennio Giordano1 and Lino C. Polito1,2

1Dipartomento di Genetica, Biologia Generale e Molecolare, Università di Napoli Naples, Italy 2Instituto di Biochimica delle Proteine ed Enzimologia CNR, Naples, Italy

* To whom correspondence should be addressed

Received April 12, 1990. Revised June 28, 1990. Accepted June 28, 1990.

The molecular organization of the dunce gene of Drosophila melanogaster has proved to be particularly complex, with two divergently transcribed genes, Sgs-4 and Pig-1, nested within its 79 kb Intron (1). Here we report the identification and the molecular characterization of a third gene nested within the transcription unit of dunce. This newly identified gene is located nearly 6 kb downstream Pig-1, within a more upstream dunce intron. The gene is developmentally regulated and transcribed with the same polarity of dunce; several lines of evidence indicate that it might encode for a salivary gland secreted (Sgs) protein.


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