Cited by 163Ubiquitin and proteasome pathwaysMicrotubule and mitosis dynamicsCancer-related Molecular Pathways

20S cyclosome complex formation and proteolytic activity inhibited by the cAMP/PKA pathway

Yamashita, Yukiko M., Nakaseko, Yukinobu, Samejima, Itaru, Kumada, Kazuki, Yamada, Hiroshi, Michaelson, David, Yanagida, Mitsuhiro·1996·Nature

Abstract

The 20S cyclosome complex (also known as the anaphase-promoting complex) has ubiquitin ligase activity and is required for mitotic cyclin destruction and sister chromatid separation. The formation and activation of the 20S cyclosome complex is regulated by an unknown mechanism. Here we show that Cut4 (ref. 6) is an essential component of the cyclosome in fission yeast. Cut4 shares sequence similarity with BimE, a protein that regulates mitosis in Aspergillus nidulans. Mutations in cut4 result in hypersensitivity to cyclic AMP and to stress-inducing heavy metals, inhibition of the onset of anaphase, disruption of the 20S complex, and inhibition of mitotic cyclin ubiquitination. These phenotypes are fully suppressed by cAMP phosphodiesterase and the protein kinase A (PKA) regulatory subunit and weakly suppressed by Sti1 (an activator of the Hsp70 and Hsp90 chaperones). Suppression correlates with the amount of 20S complex, indicating that cyclosome formation and activation is inhibited by the cAMP/PKA pathway.

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Crossref · 10.1038/384276a0

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Authors
Yamashita, Y. M., Nakaseko, Y., Samejima, I., Kumada, K., Yamada, H., Michaelson, D., & Yanagida, M.
Affiliations
Kyoto University (JP)
Venue
Nature
Published
1996-11
Volume
384
Issue
6606
Pages
276-279
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W1990634825
Cited by
163
References
26
Citations by year
2026: 2 · 2025: 1 · 2024: 4 · 2022: 2 · 2020: 1 · 2019: 1 · 2018: 4 · 2016: 4 · 2014: 5 · 2013: 6 · 2012: 3
FWCI
8.66
Type
journal article
Language
en
Open access
closed
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Microtubule and mitosis dynamics
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
Keywords
anaphase-promoting complex, cAMP/PKA signaling, protein kinase A regulatory subunit, cAMP phosphodiesterase, STI1, sister chromatid separation, anaphase onset, heavy metal stress, Schizosaccharomyces pombe, ubiquitin ligase
MeSH terms
Cyclic AMP, Anaphase, Cloning, Molecular, Genes, Fungal, Ligases, Mutation, Schizosaccharomyces, Cyclins, Cyclic AMP-Dependent Protein Kinases, Metals, Heavy

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