Abstract
Endostatin is a 20 kDa carboxyl-terminal fragment of collagen XVIII that strongly inhibits angiogenesis and tumor growth. The methylotrophic yeast, Pichia pastoris, is a robust expression system that can be used to study methods to improve the yields of rhEndostatin. We expressed rhEndostatin in P. pastoris under the control of the alcohol oxidase 1 (aox 1) promoter (Mut+ phenotype) as a model, and used a cell biomass of about 50 g l−1 dry cell wt as a starting point for the induction phase and varied the methanol feed rate at 8 ml l−1 h−1, 11 ml l−1 h−1 and 15 ml l−1 h−1. While the cell growth rate was proportional to the rate of methanol delivery, protein production rate was not. These findings could be used to guide parameters for large-scale production of recombinant proteins in the P. pastoris system.
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Jian Li, Z., Zhao, Q., Liang, H. et al. Control of recombinant human endostatin production in fed-batch cultures of Pichia pastoris using the methanol feeding rate. Biotechnology Letters 24, 1631–1635 (2002). https://doi.org/10.1023/A:1020357732474
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DOI: https://doi.org/10.1023/A:1020357732474