1887

Abstract

In fungi, the cell wall plays a major role in host–pathogen interactions. Despite this, little is known about the molecular basis of cell wall assembly in , which has emerged as the second most common cause of systemic candidosis. A gene family, , that shares significant homologies with both the gene of , which is necessary for cell wall assembly, and the pH-regulated genes and of , which are involved in cell wall assembly and required for virulence, has been cloned. Among the members of this family, display a unique expression pattern. Both and are constitutively expressed. In contrast, transcript was not detectable under any of the assayed conditions. The actin gene, , has also been cloned to be used as a meaningful loading control in Northern blots. and were deleted by two different methodological approaches. A rapid PCR-based strategy by which gene disruption was achieved with short regions of homology (50 bp) was applied successfully to . Δ or Δ cells demonstrated similar aberrant morphologies, displaying an altered bud morphology and forming floccose aggregates. These phenotypes suggest a role for and in cell wall biosynthesis. Further evidence for this hypothesis was obtained by successful functional complementation of a null mutation in with the or gene.

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2001-08-01
2020-04-05
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