Identification of a modulator of the actin cytoskeleton, mitochondria, nutrient metabolism and lifespan in yeast.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 35577788.
- Also identified by DOI 10.1038/s41467-022-30045-9 and PMC identifier 9110415.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
In yeast, actin cables are F-actin bundles that are essential for cell division through their function as tracks for cargo movement from mother to daughter cell. Actin cables also affect yeast lifespan by promoting transport and inheritance of higher-functioning mitochondria to daughter cells. Here, we report that actin cable stability declines with age. Our genome-wide screen for genes that affect actin cable stability identified the open reading frame YKL075C. Deletion of YKL075C results in increases in actin cable stability and abundance, mitochondrial fitness, and replicative lifespan. Transcriptome analysis revealed a role for YKL075C in regulating branched-chain amino acid (BCAA) metabolism. Consistent with this, modulation of BCAA metabolism or decreasing leucine levels promotes actin cable stability and function in mitochondrial quality control. Our studies support a role for actin stability in yeast lifespan, and demonstrate that this process is controlled by BCAA and a previously uncharacterized ORF YKL075C, which we refer to as actin, aging and nutrient modulator protein 1 (AAN1).
Medical subject headings
- Actin Cytoskeleton
- Longevity
- Mitochondria
- Saccharomyces cerevisiae
- Saccharomyces cerevisiae Proteins