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JXB Advance Access published online on September 9, 2003
Journal of Experimental Botany, doi:10.1093/jxb/erg275
© 2003 by Oxford University Press
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Received March 7, 2003; accepted July 11, 2003
© 2003 Society for Experimental Biology

GENE NOTE

CrMYC1, a Catharanthus roseus elicitor- and jasmonate-responsive bHLH transcription factor that binds the G-box element of the strictosidine synthase gene promoter

Guillaume Chatel 1, Grégory Montiel 2, Martial Pré 3, Johan Memelink 4, Martine Thiersault 2, Benoit Saint-Pierre 2, Pierre Doireau 1, and Pascal Gantet 2*

1 EA 2106, Biomolécules et Biotechnologies Végétales, Université de Tours, UFR des Sciences et Techniques, Laboratoire de Physiologie Végétale, Parc de Grandmont, F-37200 Tours, France
2 Unité sous Contrat reconnue par l'INRA ‘Facteurs de Transcription et Ingénierie Métabolique Végétale', UFR des Sciences et Techniques et UFR des Sciences Pharmaceutiques, Université de Tours, France; EA 2106, Biomolécules et Biotechnologies Végétales, Université de Tours, UFR des Sciences et Techniques, Laboratoire de Physiologie Végétale, Parc de Grandmont, F-37200 Tours, France
3 EA 2106, Biomolécules et Biotechnologies Végétales, Université de Tours, UFR des Sciences et Techniques, Laboratoire de Physiologie Végétale, Parc de Grandmont, F-37200 Tours, France; Institute of Biology, Leiden University, Clusius Laboratory, Wassenaarseweg 64, 2333 AL Leiden, The Netherlands
4 Institute of Biology, Leiden University, Clusius Laboratory, Wassenaarseweg 64, 2333 AL Leiden, The Netherlands

* To whom correspondence should be addressed. E-mail: gantet{at}univ-tours.fr.


  Abstract

A cDNA encoding a bHLH transcription factor was isolated by the yeast one-hybrid system from a Catharanthus roseus cDNA library using the G-box element of the Strictosidine synthase gene promoter as bait. The corresponding protein (named CrMYC1) was shown to bind specifically to the G-box in yeast. In C. roseus suspension cells CrMYC1 mRNA levels are induced by fungal elicitor and jasmonate suggesting that CrMYC1 may be involved in the regulation of gene expression in response to these signals.

Key words: bHLH, Catharanthus roseus, cMyc, elicitor, G-box, jasmonate, strictosidine synthase, transcription factor.


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