Abstract
The ZRC1 gene was cloned as a multicopy suppressor of zinc toxicity in Saccharomyces cerevisiae. Zrc1 belongs to CDF (cation diffusion facilitator) family. The transporters belonging to this family are thought to play an important role in metal detoxification. However, we found that cell growth of zrc1Delta mutant was lowered under the metal-limited conditions, which was restored by zinc. The Zap1 transcription factor is crucial for expression of several genes responsive to zinc-starvation stress. The expression of ZRC1 was induced in Zap1-dependent fashion when the intracellular zinc level was decreased and this induction was repressed by zinc. These results imply an important role of Zrc1 in the zinc-starvation stress.
Copyright 2000 Academic Press.
MeSH terms
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Base Sequence
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Biological Transport
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Carrier Proteins / genetics
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Carrier Proteins / metabolism
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Cation Transport Proteins*
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Edetic Acid / pharmacology
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Fungal Proteins / genetics*
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Fungal Proteins / metabolism
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Gene Deletion
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Gene Expression Regulation, Fungal* / drug effects
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Homeostasis / drug effects
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Membrane Proteins / genetics
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Membrane Proteins / metabolism
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Molecular Sequence Data
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Promoter Regions, Genetic / genetics
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Response Elements / genetics
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Saccharomyces cerevisiae / drug effects
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Saccharomyces cerevisiae / genetics
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Saccharomyces cerevisiae / growth & development
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Saccharomyces cerevisiae / metabolism*
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Saccharomyces cerevisiae Proteins*
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Sequence Alignment
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Trans-Activators / genetics
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Trans-Activators / metabolism*
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Transcription Factors
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Up-Regulation* / drug effects
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Zinc / antagonists & inhibitors
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Zinc / deficiency*
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Zinc / metabolism
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Zinc / pharmacology
Substances
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Carrier Proteins
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Cation Transport Proteins
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Fungal Proteins
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Membrane Proteins
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Saccharomyces cerevisiae Proteins
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Trans-Activators
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Transcription Factors
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ZAP1 protein, S cerevisiae
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ZRC1 protein, S cerevisiae
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ZRT1 protein, S cerevisiae
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Edetic Acid
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Zinc