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Microbiology and Molecular Biology Reviews, June 2007, p. 348-376, Vol. 71, No. 2
1092-2172/07/$08.00+0     doi:10.1128/MMBR.00009-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.

Environmental Sensing and Signal Transduction Pathways Regulating Morphopathogenic Determinants of Candida albicans

Subhrajit Biswas,1,{dagger},{ddagger} Patrick Van Dijck,2,3,{ddagger} and Asis Datta1*

National Centre for Plant Genome Research, New Delhi 110 067, India,1 Department of Molecular Microbiology, VIB,2 Laboratory of Molecular Cell Biology, Katholieke Universiteit Leuven, Kasteelpark Arenberg 31, B-3001 Leuven-Heverlee, Flanders, Belgium3

Candida albicans is an opportunistic fungal pathogen that is found in the normal gastrointestinal flora of most healthy humans. However, under certain environmental conditions, it can become a life-threatening pathogen. The shift from commensal organism to pathogen is often correlated with the capacity to undergo morphogenesis. Indeed, under certain conditions, including growth at ambient temperature, the presence of serum or N-acetylglucosamine, neutral pH, and nutrient starvation, C. albicans can undergo reversible transitions from the yeast form to the mycelial form. This morphological plasticity reflects the interplay of various signal transduction pathways, either stimulating or repressing hyphal formation. In this review, we provide an overview of the different sensing and signaling pathways involved in the morphogenesis and pathogenesis of C. albicans. Where appropriate, we compare the analogous pathways/genes in Saccharomyces cerevisiae in an attempt to highlight the evolution of the different components of the two organisms. The downstream components of these pathways, some of which may be interesting antifungal targets, are also discussed.

* Corresponding author. Mailing address: National Centre for Plant Genome Research, New Delhi 110 067, India. Phone: 91-11-39440511. Fax: 91-11-26109186. E-mail: ncpgr02{at}bol.net.in

{dagger} Present address: Department of Biochemistry and Molecular Bio-logy, Medical University of South Carolina, Charleston, SC 29425.

{ddagger} These authors contributed equally to the work.

Microbiology and Molecular Biology Reviews, June 2007, p. 348-376, Vol. 71, No. 2
1092-2172/07/$08.00+0     doi:10.1128/MMBR.00009-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.



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