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J. Bacteriol., Jan 1995, 94-102, Vol 177, No. 1
M Stanbrough and B Magasanik
The cellular level and activity of the general amino acid permease, the
product of the GAP1 gene of Saccharomyces cerevisiae, are regulated at the
level of transcription by two systems, the products of URE2/GLN3 and NIL1
in response to the nitrogen sources of the growth medium and inactivation
in response to the presence of glutamine or glutamate. Active permease is
phosphorylated. The addition of glutamine causes rapid dephosphorylation
and inactivation of the permease with the same kinetics, which is followed
by slower disappearance of the protein. These results suggest that
inactivation of the permease results from its dephosphorylation.
Copyright © 1995, American Society for Microbiology
Transcriptional and posttranslational regulation of the general amino acid permease of Saccharomyces cerevisiae
Department of Biology, Massachusetts Institute of Technology, Cambridge 02139.
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