Transcriptional control of yeast plasma membrane H(+)-ATPase by glucose. Cloning and characterization of a new gene involved in this regulation.
The expression of the ATPase gene (PMA1) is regulated by glucose (Rao, R., Drummond-Barbosa, D., and Slayman, C. W. (1993) Yeast 9, 1075-1084) and by the TUF/RAP1/GRF1 transcription factor (Capieaux, E., Vignais, M.-L., Sentenac, A., and Goffeau, A. (1989) J. Biol. Chem. 264, 7437-7446). In this work, we describe the isolation of mutations on seven genes that affect the levels of ATPase. One of these genes (APA1) was cloned by complementation and shown to encode a protein with six putative transmembrane stretches. Expression of APA1 gene is regulated by the carbon source and requires the protein GCR1. Deletion of APA1 causes a defective regulation of the PMA1 expression by glucose but has not noticeable effect on the expression of other TUF-regulated genes. Nevertheless the expression of glucose-repressible HXT3 and SNF3 genes is significantly reduced. These results suggest a model in which APA1 acts on a glucose-signaling pathway that controls the expression of several genes that are transcriptionally regulated by glucose.
Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid, Spain.
M
M
García-Arranz
A M
AM
Maldonado
M J
MJ
Mazón
F
F
Portillo
D000595:Amino Acid Sequence; D001483:Base Sequence; D002462:Cell Membrane / Q000201:enzymology; D003001:Cloning, Molecular; D004271:DNA, Fungal; D015966:Gene Expression Regulation, Fungal; D005800:Genes, Fungal; D005809:Genes, Regulator; D005816:Genetic Complementation Test; D005947:Glucose / Q000502:physiology*; D008969:Molecular Sequence Data; D009004:Monosaccharide Transport Proteins / Q000235:genetics / Q000378:metabolism; D009154:Mutation; D006180:Proton-Translocating ATPases / Q000235:genetics* / Q000378:metabolism; D012441:Saccharomyces cerevisiae / Q000201:enzymology / Q000235:genetics*; D014158:Transcription, Genetic; D014170:Transformation, Genetic
D004271:DNA, Fungal; D009004:Monosaccharide Transport Proteins; D006180:Proton-Translocating ATPases; D005947:Glucose