Crossref journal-article
American Society for Cell Biology (ASCB)
Molecular Biology of the Cell (1076)
Abstract

Gga proteins represent a newly recognized, evolutionarily conserved protein family with homology to the “ear” domain of the clathrin adaptor AP-1 γ subunit. Yeast cells contain two Gga proteins, Gga1p and Gga2p, that have been proposed to act in transport between thetrans-Golgi network and endosomes. Here we provide genetic and physical evidence that yeast Gga proteins function in trans-Golgi network clathrin coats. Deletion of Gga2p (gga2Δ), the major Gga protein, accentuates growth and α-factor maturation defects in cells carrying a temperature-sensitive allele of the clathrin heavy chain gene. Cells carrying eithergga2Δ or a deletion of the AP-1 β subunit gene(apl2Δ) alone are phenotypically normal, but cells carrying both gga2Δ andapl2Δ are defective in growth, α-factor maturation, and transport of carboxypeptidase S to the vacuole. Disruption of bothGGA genes and APL2 results in cells so severely compromised in growth that they form only microcolonies. Gga proteins can bind clathrin in vitro and cofractionate with clathrin-coated vesicles. Our results indicate that yeast Gga proteins play an important role in cargo-selective clathrin-mediated protein traffic from the trans-Golgi network to endosomes.

Bibliography

Costaguta, G., Stefan, C. J., Bensen, E. S., Emr, S. D., & Payne, G. S. (2001). Yeast Gga Coat Proteins Function with Clathrin in Golgi to Endosome Transport. Molecular Biology of the Cell, 12(6), 1885–1896.

Authors 5
  1. G. Costaguta (first)
  2. C. J. Stefan (additional)
  3. E. S. Bensen (additional)
  4. S. D. Emr (additional)
  5. G. S. Payne (additional)
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Dates
Type When
Created 12 years, 1 month ago (July 2, 2013, 8:15 p.m.)
Deposited 3 years, 6 months ago (Feb. 26, 2022, 9:45 p.m.)
Indexed 1 year, 3 months ago (May 22, 2024, 9:14 a.m.)
Issued 24 years, 2 months ago (June 1, 2001)
Published 24 years, 2 months ago (June 1, 2001)
Published Print 24 years, 2 months ago (June 1, 2001)
Funders 0

None

@article{Costaguta_2001, title={Yeast Gga Coat Proteins Function with Clathrin in Golgi to Endosome Transport}, volume={12}, ISSN={1939-4586}, url={http://dx.doi.org/10.1091/mbc.12.6.1885}, DOI={10.1091/mbc.12.6.1885}, number={6}, journal={Molecular Biology of the Cell}, publisher={American Society for Cell Biology (ASCB)}, author={Costaguta, G. and Stefan, C. J. and Bensen, E. S. and Emr, S. D. and Payne, G. S.}, editor={Riezman, Howard}, year={2001}, month=jun, pages={1885–1896} }