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Expression level of methanol-inducible peroxisomal proteins and peroxisome morphology are affected by oxygen conditions and mitochondrial respiratory pathway function in the methylotrophic yeastCandida boidinii
- Source :
- FEMS Yeast Research. 13:359-366
- Publication Year :
- 2013
- Publisher :
- Oxford University Press (OUP), 2013.
-
Abstract
- In the methylotrophic yeast, Candida boidinii, methanol-inducible peroxisomal proteins, for example alcohol oxidase (AOD), dihydroxyacetone synthase (DAS), and peroxisomal glutathione peroxidase (Pmp20), were induced only under aerobic conditions, while expression of PMP47 encoding peroxisomal integral membrane protein Pmp47 was independent of oxygen conditions. Expression of the methanol-inducible peroxisomal enzymes was repressed by inhibition of the mitochondrial respiratory chain. In the respiratory-deficient (ρ0) mutant strain, their induction was at very low levels despite the presence of oxygen, whereas the expression of PMP47 was unaffected. Taken together, these facts indicate that C. boidinii can sense oxygen conditions, and that mitochondrial respiratory function may have a profound effect on induction of methanol-inducible gene expression of peroxisomal proteins. Peroxisome morphology was also affected by oxygen conditions and respiratory function. Under hypoxic conditions or respiration-inhibited conditions, cells induced by methanol contained small peroxisomes, indicating that peroxisome biogenesis and the protein import machinery were not affected by oxygen conditions but that peroxisome morphology was dependent on induction of peroxisomal matrix proteins.
- Subjects :
- Peroxisomal matrix
Gene Expression Profiling
Methanol
General Medicine
Biology
Peroxisome
Applied Microbiology and Biotechnology
Microbiology
Yeast
Mitochondria
Alcohol oxidase
Electron Transport
Oxygen
Mitochondrial respiratory chain
Biochemistry
Gene expression
Peroxisomes
Respiratory function
Integral membrane protein
Candida
Subjects
Details
- ISSN :
- 15671356
- Volume :
- 13
- Database :
- OpenAIRE
- Journal :
- FEMS Yeast Research
- Accession number :
- edsair.doi.dedup.....4c755581451285b5778a35677eb26d49