Crossref journal-article
Rockefeller University Press
The Journal of Cell Biology (291)
Abstract

SUMO is a ubiquitin-related protein that functions as a posttranslational modification on other proteins. SUMO conjugation is essential for viability in Saccharomyces cerevisiae and is required for entry into mitosis. We have found that SUMO is attached to the septins Cdc3, Cdc11, and Shs1/Sep7 specifically during mitosis, with conjugates appearing shortly before anaphase onset and disappearing abruptly at cytokinesis. Septins are components of a belt of 10-nm filaments encircling the yeast bud neck. Intriguingly, only septins on the mother cell side of the bud neck are sumoylated. We have identified four major SUMO attachment-site lysine residues in Cdc3, one in Cdc11, and two in Shs1, all within the consensus sequence (IVL)KX(ED). Mutating these sites eliminated the vast majority of bud neck-associated SUMO, as well as the bulk of total SUMO conjugates in G2/M-arrested cells, indicating that sumoylated septins are the most abundant SUMO conjugates at this point in the cell cycle. This mutant has a striking defect in disassembly of septin rings, resulting in accumulation of septin rings marking previous division sites. Thus, SUMO conjugation plays a role in regulating septin ring dynamics during the cell cycle.

Bibliography

Johnson, E. S., & Blobel, G. (1999). Cell Cycle–Regulated Attachment of the Ubiquitin-Related Protein Sumo to the Yeast Septins. The Journal of Cell Biology, 147(5), 981–994.

Authors 2
  1. Erica S. Johnson (first)
  2. Günter Blobel (additional)
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Dates
Type When
Created 23 years, 1 month ago (July 26, 2002, 12:45 p.m.)
Deposited 2 years ago (July 28, 2023, 9:06 p.m.)
Indexed 3 weeks, 4 days ago (Aug. 2, 2025, 1:04 a.m.)
Issued 25 years, 8 months ago (Nov. 29, 1999)
Published 25 years, 8 months ago (Nov. 29, 1999)
Published Online 25 years, 8 months ago (Nov. 29, 1999)
Published Print 25 years, 8 months ago (Nov. 29, 1999)
Funders 0

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@article{Johnson_1999, title={Cell Cycle–Regulated Attachment of the Ubiquitin-Related Protein Sumo to the Yeast Septins}, volume={147}, ISSN={1540-8140}, url={http://dx.doi.org/10.1083/jcb.147.5.981}, DOI={10.1083/jcb.147.5.981}, number={5}, journal={The Journal of Cell Biology}, publisher={Rockefeller University Press}, author={Johnson, Erica S. and Blobel, Günter}, year={1999}, month=nov, pages={981–994} }