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First published online 3 September 2003
doi: 10.1242/dev.00678

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Distinct roles of transcription factors EGL-46 and DAF-19 in specifying the functionality of a polycystin-expressing sensory neuron necessary for C. elegans male vulva location behavior

¹ HHMI and Division of Biology, California Institute of Technology, Pasadena, CA 91125, USA
² Division of Cell Biology, Biozentrum, University of Basel, Klingelbergstr. 50/70, CH-4056 Basel, Switzerland
³ Department of Biosciences at Novum, Karolinska Institutet, Alfred Nobels alle 7, Södertörns Högskola, SE-141 89 Huddinge, Sweden

^* Author for correspondence (e-mail: pws{at}caltech.edu)

Accepted 19 June 2003

Caenorhabditis elegans polycystins LOV-1 and PKD-2 are expressed in the male-specific HOB neuron, and are necessary for sensation of the hermaphrodite vulva during mating. We demonstrate that male vulva location behavior and expression of lov-1 and pkd-2 in the ciliated sensory neuron HOB require the activities of transcription factor EGL-46 and to some extent also EGL-44. This EGL-46- regulated program is specific to HOB and is distinct from a general ciliogenic pathway functioning in all ciliated neurons. The ciliogenic pathway regulator DAF-19 affects downstream components of the HOB-specific program indirectly and is independent of EGL-46 activity. The sensory function of HOB requires the combined action of these two distinct regulatory pathways.

Key words: Transcriptional regulation, Cell specification, Zinc finger proteins, TEF, RFX factors, Polycystins

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