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Crane MM, Tsuchiya M, Blue BW, Almazan JD, Chen KL, Duffy SR, Golubeva A, Grimm AM, Guard AM, Hill SA, Huynh E, Kelly RM, Kiflezghi M, Kim HD, Lee M, Lee TI, Li J, Nguyen BM, Whalen RM, Yeh FY, McCormick M, Kennedy BK, Delaney JR, Kaeberlein M. Rb analog Whi5 regulates G1 to S transition and cell size but not replicative lifespan in budding yeast. Transl Med Aging 2019; 3:104-108. [PMID: 32190787 PMCID: PMC7080187 DOI: 10.1016/j.tma.2019.10.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
An increase in cell size with age is a characteristic feature of replicative aging in budding yeast. Deletion of the gene encoding Whi5 results in shortened duration of G1 and reduced cell size, and has been previously suggested to increase replicative lifespan. Upon careful analysis of multiple independently derived haploid and homozygous diploid whi5Δ mutants, we find no effect on lifespan, but we do confirm the reduction in cell size. We suggest that instead of antagonizing lifespan, the elongated G1 phase of the cell cycle during aging may actually play an important role in allowing aged cells time to repair accumulating DNA damage.
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Affiliation(s)
- Matthew M. Crane
- Department of Pathology, University of Washington, Seattle, WA, USA
| | | | - Ben W. Blue
- Department of Pathology, University of Washington, Seattle, WA, USA
| | - Jared D. Almazan
- Department of Pathology, University of Washington, Seattle, WA, USA
| | - Kenneth L. Chen
- Department of Pathology, University of Washington, Seattle, WA, USA
- Department of Genome Sciences, University of Washington, Seattle, Washington, USA
- Medical Scientist Training Program, University of Washington, Seattle, Washington USA
| | - Siobhan R. Duffy
- Department of Pathology, University of Washington, Seattle, WA, USA
| | | | - Annaiz M Grimm
- Department of Pathology, University of Washington, Seattle, WA, USA
| | - Alison M Guard
- Department of Pathology, University of Washington, Seattle, WA, USA
| | - Shauna A Hill
- Department of Pathology, University of Washington, Seattle, WA, USA
| | - Ellen Huynh
- Department of Pathology, University of Washington, Seattle, WA, USA
| | - Ryan M Kelly
- Department of Pathology, University of Washington, Seattle, WA, USA
| | | | - Hyunsung D. Kim
- Department of Pathology, University of Washington, Seattle, WA, USA
| | - Mitchell Lee
- Department of Pathology, University of Washington, Seattle, WA, USA
| | - Ting-I Lee
- Department of Pathology, University of Washington, Seattle, WA, USA
| | - Jiayi Li
- Department of Pathology, University of Washington, Seattle, WA, USA
| | - Bao M.G. Nguyen
- Department of Pathology, University of Washington, Seattle, WA, USA
| | - Riley M. Whalen
- Department of Pathology, University of Washington, Seattle, WA, USA
| | - Feng Y. Yeh
- Department of Pathology, University of Washington, Seattle, WA, USA
| | - Mark McCormick
- Department of Biochemistry and Molecular Biology, University of New Mexico, Albuquerque, NM, USA
| | | | - Joe R. Delaney
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC, USA
| | - Matt Kaeberlein
- Department of Pathology, University of Washington, Seattle, WA, USA
- Department of Genome Sciences, University of Washington, Seattle, Washington, USA
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