東　剣虹    Department   Research Institutes and Facilities, Research Institutes and Facilities    Position   Assistant Professor
Article types	Original article
Language	English
Peer review	Peer reviewed
Title	The fission yeast php2 mutant displays a lengthened chronological lifespan.
Journal	Formal name：Bioscience, biotechnology, and biochemistry Abbreviation：Biosci Biotechnol Biochem ISSN code：(1347-6947)0916-8451(Linking)
Volume, Issue, Page	77(7),pp.1548-55
Author and coauthor	Takuma Kazuaki, Ohtsuka Hokuto, Azuma Kenko, Murakami Hiroshi, Aiba Hirofumi
Publication date	2013
Summary	The Schizosaccharomyces pombe php2(+) gene encodes a subunit of the CCAAT-binding factor complex. We found that disruption of the php2(+) gene extended the chronological lifespan of the fission yeast. Moreover, the lifespan of the Δphp2 mutant was barely extended under calorie restricted (CR) conditions. Many other phenotypes of the Δphp2 mutant resembled those of wild-type cells grown under CR conditions, suggesting that the Δphp2 mutant might undergo CR. The mutant also showed low respiratory activity concomitant with decreased expression of the cyc1(+) and rip1(+) genes, both of which are involved in mitochondrial electron transport. On the basis of a chromatin immunoprecipitation assay, we determined that Php2 binds to a DNA region upstream of cyc1(+) and rip1(+) in S. pombe. Here we discuss the possible mechanisms by which the chronological lifespan of Δphp2 mutant is extended.
DOI	10.1271/bbb.130223
PMID	23832353