Overexpression of the novel F-box protein Ymr258c confers resistance to methylmercury in Saccharomyces cerevisiae.
We searched a yeast genomic library for genes that conferred methylmercury resistance to yeast. Ymr258c was identified as a factor that conferred strong methylmercury resistance when overexpressed in budding yeast. Ymr258c is regarded as one of the F-box proteins, i.e., component factors of the Skp1/Cullin/F-box protein (SCF) complex that functions as a ubiquitin ligase in the ubiquitin-proteasome system. In this study, Ymr258c was demonstrated to function as an F-box protein to reduce methylmercury toxicity. The overexpression of Ymr258c might promote the ubiquitination of proteins that are involved in the enhancement of methylmercury toxicity, and thereby promote their degradation by proteasomes to reduce methylmercury toxicity.
Hwang
Gi-Wook
GW
Wada
Naomi
N
Kuge
Shusuke
S
Naganuma
Akira
A
D025141:Drug Resistance, Fungal / Q000235:genetics*; D044783:F-Box Proteins / Q000502:physiology*; D015966:Gene Expression Regulation, Fungal; D008767:Methylmercury Compounds / Q000494:pharmacology* / Q000633:toxicity*; D046988:Proteasome Endopeptidase Complex / Q000378:metabolism; D044843:SKP Cullin F-Box Protein Ligases / Q000502:physiology*; D012441:Saccharomyces cerevisiae / Q000187:drug effects* / Q000235:genetics*
D044783:F-Box Proteins; D008767:Methylmercury Compounds; D044843:SKP Cullin F-Box Protein Ligases; D046988:Proteasome Endopeptidase Complex