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Mol. Cell. Biol., Jun 1996, 2700-2707, Vol 16, No. 6
SF Nothwehr, NJ Bryant and TH Stevens
Processing of A-ALP, a late-Golgi membrane protein constructed by fusing
the cytosolic domain of dipeptidyl aminopeptidase A to the transmembrane
and lumenal domains of alkaline phosphatase (ALP), serves as a convenient
assay for loss of retention of late-Golgi membrane proteins in
Saccharomyces cerevisiae. In this study, a large group of novel grd (for
Golgi retention defective) yeast mutants, representing 18 complementation
groups, were identified on the basis of their mislocalization of A-ALP to
the vacuole, where it was proteolytically processed and thus became
enzymatically activated. All of the grd mutants exhibited significant
mislocalization of A-ALP, as measured by determining the kinetics of A-ALP
processing and by analyzing its
Copyright © 1996, American Society for Microbiology
The newly identified yeast GRD genes are required for retention of late- Golgi membrane proteins
Division of Biological Sciences, University of Missouri, Columbia 65211, USA.
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