Pichia pastoris Glucose/Methanol comparison
Ontology highlight
ABSTRACT:
ORGANISM(S): Komagataella pastoris Komagataella phaffii CBS 7435
PROVIDER: GSE67690 | GEO | 2015/08/31
SECONDARY ACCESSION(S): PRJNA280698
REPOSITORIES: GEO
Similar Datasets
Project description:Comparison of transcription profile of Pichia pastoris cells grown on Glucose medium with Pichia pastoris cells grown on Methanol/Glycerol medium, the fermentations were done in a chemostat. 2 color experiment in reference design. Pichia pastoris reference mix [mixed pool of Pichia pastoris cells sampled from various conditions including cells grown on glycerine, glucose and methanol, on full andminimal medium, in stationary and exponential growth phase, and in different stress states]
2015-08-31 | E-GEOD-67690 | biostudies-arrayexpress
Project description:Pichia pastoris (Komagataella phaffi) transcription factor Mxr1p is known to regulate multiple metabolic pathways by binding to Mxr1p response elements of target genes. Mxr1p possesses a transactivation domain within the N-terminal 400 amino acids (Mxr1N400) which is functional during methanol metabolism. (Parua et al; 2012) Studies from our lab have shown that delta_mxr1 complemented with Mxr1N400 fails to reverse the growth defect of delta_mxr1 cultured in a medium containing methanol suggesting that region beyond N-terminal 400 amino acids has an essential function. We employed DNA microarray to identify genes whose expression is regulated by Mxr1N400 and full length Mxr1 during methanol metabolism. Pichia pastoris 14-3-3 regulates transcriptional activity of the methanol inducible transcription factor Mxr1 by direct interaction. Pabitra K. Parua, Paul M. Ryan and Elton T. Young. Molecular microbiology, 2012
2021-09-22 | GSE146829 | GEO
Project description:Pichia pastoris is a widely used yeast platform for heterologous protein production. Although increasing gene dosage is a powerful strategy to improve recombinant protein production, an excess in the number of gene copies often leads to decreased product yields and increased metabolic burden. In order to find the bottlenecks of this strategy, here we present a transcriptome profile comparison of a series of Pichia pastoris strains carrying a different gene dosage of the Rhizopus oryzae lipase (Rol) as a model protein. Cells were grown on a mixture of glycerol:methanol in chemostat cultures. 2 color experiment in reference design.
2017-02-22 | E-MTAB-4582 | biostudies-arrayexpress
Project description:The regulation of gene expression in Pichia pastoris has so far involved study of transcription factors. However, there are factors other than transcription factors affecting mRNA synthesis such as coactivators, enhancers, and chromatin modifiers. This study is a first ever report on epigenetic regulation in Pichia pastoris where, a histone acetyltransferase is reported to regulate transcription of genes involved in utilization of alternate carbon sources. We employed RNA Seq to identify new targets of Gcn5 in methanol medium.
2022-12-31 | GSE150467 | GEO
Project description:Pichia pastoris is widely used as a host for recombinant protein production. More than 500 proteins have been expressed in the organism at a variety of cultivation scales, from small shake flasks to large bioreactors. Large-scale fermentation strategies typically employ chemically-defined growth media because of its greater batch-to-batch consistency and in many cases, lower cost compared to complex media. For biopharmaceuticals, defined growth media may also simplify downstream purification and regulatory documentation. Standard formulations of defined media for Pichia are minimal ones that lack the metabolic intermediates provided by complex components such as peptone and yeast extract. As a result, growth rates and per-cell productivities are significantly lower than in complex media. We have designed an improved defined media for Pichia pastoris, rich defined medium (RDM), by systematically evaluating nutrients of increasing complexity and identifying those that are most critical for growth. We have also demonstrated the use of RDM for expression of three heterologous proteins, at titers comparable to or higher than in standard complex medium. Rich defined medium has the potential to improve productivity of Pichia pastoris fermentations and accelerate process development for new molecules.
2019-05-22 | GSE99613 | GEO
Project description:The regulation of gene expression in Pichia pastoris has so far involved study of transcription factors. However, there are factors other than transcription factors affecting mRNA synthesis such as coactivators, enhancers, and chromatin modifiers. This study is a first ever report on epigenetic regulation in Pichia pastoris where, a histone acetyltransferase is reported to regulate transcription of genes involved in utilization of alternate carbon sources. We employed RNA Seq to identify new targets of Gcn5 in methanol medium.
2022-09-28 | GSE186300 | GEO
Project description:Pichia pastoris was grown in carbon limited chemostat cultures on mineral medium with glucose as carbon source. 3 different osmolarities were selected (140, 850, 1400mOsmol kg-1). Samples were taken at steady-state, thus the effect of osmolarity in adapted cells was monitored.
2010-10-26 | E-MEXP-2433 | biostudies-arrayexpress
Project description:Transcriptional profiling of Pichia angusta NCYC 495 leu1.1 cells growing exponentially on mineral medium containing 0.5% glucose versus a shift for 2 hours to mineral medium containing 0.5% methanol.
2009-11-17 | GSE19036 | GEO
Project description:Transcriptional profiling of Pichia angusta NCYC 495 leu1.1 cells growing exponentially on mineral medium containing 0.5% glucose versus a shift for 2 hours to mineral medium containing 0.5% methanol. Two-conditions experiment, 4 individual glucose-grown cultures were shifted at OD660nm 2.3 to fresh mineral medium OD 0.2 containing 0.5% methanol for 2 hours. Transcriptional profiling was performed using total RNA from the glucose-grown cells at the moment of the shift versus cells adapted to methanol for 2 hours.
2010-06-19 | E-GEOD-19036 | biostudies-arrayexpress
Project description:Over the past three decades, due to the universal application of Pichia yeast in the fermentation industry as well as the establishment of Pichia pastoris fermentation process for more than 30 years, the technology of the whole process has become very mature and has now reached a stagnated period of growth. However, studies and research conducted on the genomics of the classic fermentation process and the uncovering of the biological phenomena in the fermentation process from the point of view of high-throughput gene or protein is still in its early stages, and there is still insufficient data within this field. First, in collaboration with Agilent Company, we designed and prepared an expression microarray that could be used for the detection of Pichia pastoris transcriptomics. The transcriptomic changes in the five key technology steps (time points), during the fermentation process of Pichia pastoris would then be detected with the aid of an expression microarray. The five key steps of technology described above formed two important biological processes, namely, the limiting carbon source replacement and secondly, the fermentative production of exogenous proteins. The biological phenomena involved in these two processes were displayed and analyzed at the transcriptional level. In addition to this, with regard to the most important function in the fermentation process of Pichia pastoris, oxid-reduction, the metabolic drift process was analyzed and the important genes that might dominate the changes in the metabolic flux were discovered creatively by using the function tree method in this paper. This study was undertaken from the point of view of the transcriptome and the biological phenomena in the fermemntation process of Pichia pastoris. Both of which, were thoroughly explained during this study. The hope is for many more researchers to optimize the strain fermentation process, to produce proteins at the genetic level, as well as providing and obtaining new perspectives and detailed scientific data for the continued development within this field.
2014-04-18 | GSE56873 | GEO