Abstract
Six new members of the yeast p24 family have been identified and characterized. These six genes, named ERP1-ERP6 (for Emp24p- and Erv25p-related proteins) are not essential, but deletion of ERP1 or ERP2 causes defects in the transport of Gas1p, in the retention of BiP, and deletion of ERP1 results in the suppression of a temperature-sensitive mutation in SEC13 encoding a COPII vesicle coat protein. These phenotypes are similar to those caused by deletion of EMP24 or ERV25, two previously identified genes that encode related p24 proteins. Genetic and biochemical studies demonstrate that Erp1p and Erp2p function in a heteromeric complex with Emp24p and Erv25p.
MeSH terms
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Amino Acid Sequence
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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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Fungal Proteins / genetics
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Fungal Proteins / metabolism*
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Gene Deletion
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Genes, Fungal
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HSP70 Heat-Shock Proteins / genetics
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HSP70 Heat-Shock Proteins / metabolism
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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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Mutation
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Phenotype
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Saccharomyces cerevisiae Proteins*
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Vesicular Transport Proteins*
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Yeasts / genetics
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Yeasts / metabolism*
Substances
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Carrier Proteins
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EMP24 protein, S cerevisiae
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ERV25 protein, S cerevisiae
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Fungal Proteins
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HSP70 Heat-Shock Proteins
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KAR2 protein, yeast
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Membrane Proteins
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Saccharomyces cerevisiae Proteins
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Vesicular Transport Proteins