Transcriptome analysis of Δmig1Δmig2 mutant reveals their roles in methanol catabolism, peroxisome biogenesis and autophagy in methylotrophic yeast Pichia pastoris

2017 ◽  
Vol 40 (4) ◽  
pp. 399-412 ◽  
Author(s):  
Lei Shi ◽  
Xiaolong Wang ◽  
Jinjia Wang ◽  
Ping Zhang ◽  
Fei Qi ◽  
...  
Keyword(s):  
Pichia Pastoris ◽  
Transcriptome Analysis ◽  
Methylotrophic Yeast ◽  
Peroxisome Biogenesis ◽  
Yeast Pichia Pastoris ◽  
Methylotrophic Yeast Pichia Pastoris

scholarly journals Positive Selection of Novel Peroxisome Biogenesis-Defective Mutants of the Yeast Pichia pastoris

Genetics ◽  
1999 ◽  
Vol 151 (4) ◽  
pp. 1379-1391
Author(s):  
Monique A Johnson ◽  
Hans R Waterham ◽  
Galyna P Ksheminska ◽  
Liubov R Fayura ◽  
Joan Lin Cereghino ◽  
...  
Keyword(s):  
Pichia Pastoris ◽  
Allyl Alcohol ◽  
Alcohol Oxidase ◽  
Methylotrophic Yeast ◽  
Direct Selection ◽  
Toxic Exposure ◽  
Peroxisome Biogenesis ◽  
Yeast Pichia Pastoris ◽  
Methylotrophic Yeast Pichia Pastoris ◽  
Selection Of

Abstract We have developed two novel schemes for the direct selection of peroxisome-biogenesis-defective (pex) mutants of the methylotrophic yeast Pichia pastoris. Both schemes take advantage of our observation that methanol-induced pex mutants contain little or no alcohol oxidase (AOX) activity. AOX is a peroxisomal matrix enzyme that catalyzes the first step in the methanol-utilization pathway. One scheme utilizes allyl alcohol, a compound that is not toxic to cells but is oxidized by AOX to acrolein, a compound that is toxic. Exposure of mutagenized populations of AOX-induced cells to allyl alcohol selectively kills AOX-containing cells. However, pex mutants without AOX are able to grow. The second scheme utilizes a P. pastoris strain that is defective in formaldehyde dehydrogenase (FLD), a methanol pathway enzyme required to metabolize formaldehyde, the product of AOX. AOX-induced cells of fld1 strains are sensitive to methanol because of the accumulation of formaldehyde. However, fld1 pex mutants, with little active AOX, do not efficiently oxidize methanol to formaldehyde and therefore are not sensitive to methanol. Using these selections, new pex mutant alleles in previously identified PEX genes have been isolated along with mutants in three previously unidentified PEX groups.

scholarly journals Cloning and characterization of PAS5: a gene required for peroxisome biogenesis in the methylotrophic yeast Pichia pastoris.

1993 ◽  
Vol 123 (3) ◽  
pp. 535-548 ◽  
Author(s):  
A P Spong ◽  
S Subramani
Keyword(s):  
Pichia Pastoris ◽  
Methylotrophic Yeast ◽  
Genetic System ◽  
Peroxisome Biogenesis ◽  
Yeast Pichia Pastoris ◽  
Ultrastructural Studies ◽  
Methylotrophic Yeast Pichia Pastoris ◽  
Fractionation Analysis ◽  
Biochemical Fractionation ◽  
Complementation Groups

The biogenesis and maintenance of cellular organelles is of fundamental importance in all eukaryotic cells. One such organelle is the peroxisome. The establishment of a genetic system to study peroxisome biogenesis in the methylotrophic yeast Pichia pastoris has yielded many different complementation groups of peroxisomal assembly (pas) or peroxisome-deficient (per) mutants. Each appears to be deficient in functional peroxisomes. One of these mutants, pas5, has been characterized, complemented, and the gene sequenced. Ultrastructural studies show that normal peroxisomes are not present in pas5, but aberrant peroxisomal structures resembling "membranous ghosts" are frequently observed. The "peroxisome ghosts" appear to be induced and segregated to daughter cells normally. Biochemical fractionation analysis of organelles of the pas5 mutant reveals that peroxisomal matrix enzymes are induced normally but are found mostly in the cytosol. However, purification of peroxisome ghosts from the mutant shows that small amounts (< 5%) of matrix enzymes are imported. The PAS5 gene was cloned and found to encode a 127-kD protein, which contains a 200-amino acid-long region of homology with PAS1, NEM-sensitive factor (NSF), and other related ATPases. Weak homology to a yeast myosin was also observed. The gene is not essential for growth on glucose but is essential for growth on oleic acid and methanol. The role of PAS5 in peroxisome biogenesis is discussed.

The lipidome and proteome of microsomes from the methylotrophic yeast Pichia pastoris

2014 ◽  
Vol 1841 (2) ◽  
pp. 215-226 ◽  
Author(s):  
Lisa Klug ◽  
Pablo Tarazona ◽  
Clemens Gruber ◽  
Karlheinz Grillitsch ◽  
Brigitte Gasser ◽  
...  
Keyword(s):  
Pichia Pastoris ◽  
Methylotrophic Yeast ◽  
Yeast Pichia Pastoris ◽  
Methylotrophic Yeast Pichia Pastoris

scholarly journals Lipidome and proteome of lipid droplets from the methylotrophic yeast Pichia pastoris

2013 ◽  
Vol 1831 (2) ◽  
pp. 282-290 ◽  
Author(s):  
Vasyl A. Ivashov ◽  
Karlheinz Grillitsch ◽  
Harald Koefeler ◽  
Erich Leitner ◽  
Dominic Baeumlisberger ◽  
...  
Keyword(s):  
Pichia Pastoris ◽  
Lipid Droplets ◽  
Methylotrophic Yeast ◽  
Yeast Pichia Pastoris ◽  
Methylotrophic Yeast Pichia Pastoris
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