Reference - PMID:34674264 - Localization of the ubiquitin ligase Dma1 to the fission yeast contractile ring is modulated by phosphorylation.

Reference summary

PubMed ID

PMID:34674264

Title

Localization of the ubiquitin ligase Dma1 to the fission yeast contractile ring is modulated by phosphorylation.

Authors

Chen JS, Jones CM, Igarashi MG, Ren L, Johnson AE, Gould KL

Citation

FEBS Lett 2021 Nov;595(22):2781-2792

Publication year

2021

Abstract

The timing of cytokinesis relative to other mitotic events in the fission yeast Schizosaccharomyces pombe is controlled by the septation initiation network (SIN). During a mitotic checkpoint, the SIN is inhibited by the E3 ubiquitin ligase Dma1 to prevent chromosome mis-segregation. Dma1 dynamically localizes to spindle pole bodies (SPBs) and the contractile ring (CR) during mitosis, though its role at the CR is unknown. Here, we examined whether Dma1 phosphorylation affects its localization or function. We found that preventing Dma1 phosphorylation by substituting the six phosphosites with alanines diminished its CR localization but did not affect its mitotic checkpoint function. These studies reinforce the conclusion that Dma1 localization to the SPB is key to its role in the mitotic checkpoint.

Annotation