Applied Microbiology and Biotechnology

, Volume 93, Issue 4, pp 1609–1618

N-glycans are not required for the efficient degradation of the mutant Saccharomyces cerevisiae CPY* in Schizosaccharomyces pombe

  • Hiroyuki Mukaiyama
  • Michiko Kodera
  • Naotaka Tanaka
  • Kaoru Takegawa
Applied genetics and molecular biotechnology

DOI: 10.1007/s00253-011-3662-z

Cite this article as:
Mukaiyama, H., Kodera, M., Tanaka, N. et al. Appl Microbiol Biotechnol (2012) 93: 1609. doi:10.1007/s00253-011-3662-z
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Abstract

In eukaryotic cells, aberrant proteins generated in the endoplasmic reticulum (ER) are degraded by the ER-associated degradation (ERAD) pathway. Here, we report on the ERAD pathway of the fission yeast Schizosaccharomyces pombe. We constructed and expressed Saccharomyces cerevisiae wild-type CPY (ScCPY) and CPY-G255R mutant (ScCPY*) in S. pombe. While ScCPY was glycosylated and efficiently transported to the vacuoles in S. pombe, ScCPY* was retained in the ER and was not processed to the matured form in these cells. Cycloheximide chase experiments revealed that ScCPY* was rapidly degraded in S. pombe, and its degradation depended on Hrd1p and Ubc7p homologs. We also found that Mnl1p and Yos9p, proteins that are essential for ERAD in S. cerevisiae, were not required for ScCPY* degradation in S. pombe. Moreover, the null-glycosylation mutant of ScCPY, CPY*0000, was rapidly degraded by the ERAD pathway. These results suggested that N-linked oligosaccharides are not important for the recognition of luminal proteins for ERAD in S. pombe cells.

Keywords

Schizosaccharomyces pombeERADCarboxypeptidase YProtein degradation

Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Hiroyuki Mukaiyama
    • 1
    • 2
    • 3
  • Michiko Kodera
    • 2
  • Naotaka Tanaka
    • 2
  • Kaoru Takegawa
    • 2
    • 3
  1. 1.ASPEX Division, Research CenterAsahi Glass Co., LtdKanagawaJapan
  2. 2.Department of Life Sciences, Faculty of AgricultureKagawa UniversityKagawaJapan
  3. 3.Department of Bioscience and Biotechnology, Faculty of AgricultureKyushu UniversityFukuokaJapan