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Transcriptomic analysis of Pichia pastoris (Komagataella phaffii) GS115 during heterologous protein production using a high-cell-density fed-batch cultivation strategy

ABSTRACT: Transcriptomic analysis of Pichia pastoris (Komagataella phaffii) GS115 during heterologous protein production using a high-cell-density fed-batch cultivation strategy

PROVIDER: PRJNA596645 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR10740038_1.fastq.gz	Fastqsanger.gz
	SRR10740038_2.fastq.gz	Fastqsanger.gz
	SRR10740039_1.fastq.gz	Fastqsanger.gz
	SRR10740039_2.fastq.gz	Fastqsanger.gz
	SRR10740040_1.fastq.gz	Fastqsanger.gz

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Transcriptomic analysis of Pichia pastoris (Komagataella phaffii) GS115 during heterologous protein production using a high-cell-density fed-batch cultivation strategy

Project description:We investigated gene expression during the bench-scale batch fermentation phase, glycerol feed phase, glycerol-methanol mixture feed (GM) phase, and at different time points following methanol induction using RNA-Seq. We report that the addition of the GM phase may help to alleviate the adverse effects of methanol addition (alone) on P. pastoris cells. Secondly, enhanced upregulation of the mitogen-activated protein kinase (MAPK) signaling pathway was observed in P. pastoris following methanol induction. The MAPK signaling pathway may be related to P. pastoris cell growth, and may regulate the AOX1 promoter via regulatory factors activated by methanol-mediated stimulation. Thirdly, the unfolded protein response (UPR) and ER-associated degradation (ERAD) pathways were not significantly upregulated during the methanol induction period. These results imply that the presence of unfolded or misfolded phytase protein did not represent a serious problem in our study. Finally, the upregulation of the autophagy pathway during the methanol induction phase may be related to the degradation of damaged peroxisomes but not to the production of phytase. This work describes the metabolic characteristics of P. pastoris during heterologous protein production under high-cell-density fed-batch cultivation. We believe that the results of this study will aid further in-depth studies of P. pastoris protein expression, regulation, and secretory mechanisms.

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