Ecl1, a Regulator of the Chronological Lifespan of Schizosaccharomyces pombe, Is Induced upon Nitrogen Starvation

• Published in: Bioscience, biotechnology, and biochemistry biotechnology, and biochemistry, 2011, Vol.75 (2), p.279-283
• Main Authors: MIWA, Yukiko, OHTSUKA, Hokuto, NAITO, Chikako, MURAKAMI, Hiroshi, AIBA, Hirofumi
• Format: Article
• Language: English
• Subjects: aging; Biological and medical sciences; Cell Cycle; Cell Proliferation; chronological lifespan; DEAD-box RNA Helicases - metabolism; Ecl1; fission yeast; Fundamental and applied biological sciences. Psychology; Gene Expression Regulation, Fungal; Nitrogen - deficiency; Nuclear Proteins - metabolism; Protein Kinases - metabolism; Schizosaccharomyces - cytology; Schizosaccharomyces - genetics; Schizosaccharomyces - metabolism; Schizosaccharomyces pombe; Schizosaccharomyces pombe Proteins - metabolism; Time Factors
• ISSN: 0916-8451; 1347-6947; 1347-6947
• DOI: 10.1271/bbb.100607

In fission yeast, ecl1 + was identified as a novel factor that extends chronological lifespan when overexpressed. Ecl1 is a small protein consisting of 80 amino acids localized mainly in the nucleus. However, the mechanism by which it affects chronological lifespan has not been elucidated clearly. Here we analyzed the expression profile of Ecl1, especially as to cell cycle and growth phase, and found that it is induced upon nitrogen starvation. Then we analyzed the relevance of factors, Atf1, Ste11, and Tor1, which are known to be involved in the signaling of nitrogen starvation. Though the nitrogen starvation-induced expression of Ecl1 did not change in the atf1Δ mutant, induction in both the ste11Δ mutant and the tor1Δ mutant showed a delay. Based on these observations, the regulation of Ecl1 is discussed.