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- W2059545150 abstract "P30P2MSP119 is a recombinant subunit vaccine derived from merozoite surface protein 1 (MSP1) of Plasmodium falciparum, the causative agent of malaria. P30P2MSP119 consists of two universal T-cell epitopes fused to the most C-terminal 19-kDa portion of MSP1, and this protein has previously shown promising potential as a vaccine for malaria. However, previous attempts at producing this molecule in Saccharomyces cerevisiae resulted in the production of a truncated form of the molecule missing most of the universal T-cell epitopes. Here, we report the production of full-length P30P2MSP119 in Pichia pastoris. As salt precipitation is a common problem during P. pastoris high-density fermentation, we utilized an alternative low-salt, fully defined medium that did not reduce growth rates or biomass yields to avoid precipitation. A total of 500 mg/L of secreted purified protein was produced in high cell density fermentation and the protein was purified in one step utilizing nickel-chelate chromatography. P30P2MSP119 produced in Pichia was reactive with monoclonal antibodies that recognize only conformational epitopes on correctly folded MSP1. Rabbits immunized with this molecule generated higher and more uniform antibody titers than rabbits immunized with the protein produced in Saccharomyces. P30P2MSP119 produced in Pichia may prove to be a more efficacious vaccine than that produced in Saccharomyces and Pichia would provide a system for the cost-effective production of such a vaccine." @default.
- W2059545150 created "2016-06-24" @default.
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- W2059545150 date "2001-12-01" @default.
- W2059545150 modified "2023-09-26" @default.
- W2059545150 title "High-Level Production and Purification of P30P2MSP119, an Important Vaccine Antigen for Malaria, Expressed in the Methylotropic Yeast Pichia pastoris" @default.
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- W2059545150 doi "https://doi.org/10.1006/prep.2001.1526" @default.
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