Journal
MICROBIOLOGY AND MOLECULAR BIOLOGY REVIEWS
Volume 66, Issue 3, Pages 426-+Publisher
AMER SOC MICROBIOLOGY
DOI: 10.1128/MMBR.66.3.426-446.2002
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Life, as we know it, is water based. Exposure to hydroxonium and hydroxide ions is constant and ubiquitous, and the evolutionary, pressure to respond appropriately, to these ions is likely, to be intense. Fungi respond to their environments by, tailoring their output of activities destined for the cell surface or beyond to the ambient pH. We are beginning to glimpse how they, sense ambient pH and transmit this information to the transcription factor, whose roles ensure that a suitable collection of gene products will be made. Although relatively, little is known about pH signal transduction itself, its consequences for the cognate transcription factor are much clearer. Intriguingly, homologues of components of this system mediating the regulation of fungal gene expression by, ambient pH are to be found in the animal kingdom. The potential applied importance of this regulatory system lies in its key role in fungal pathogenicity of animals and plants and in its control of fungal production of toxins, antibiotics, and secreted enzymes.
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