Related Experiment Video
Updated: Apr 26, 2026
Expression of Recombinant Proteins in the Methylotrophic Yeast Pichia pastoris
Published on: February 25, 2010
Expression of a codon-optimized Aspergillus niger pectin methylesterase gene in the methylotrophic yeast Candida
Kosuke Kawaguchi1, Hiroya Yurimoto, Yasuyoshi Sakai
1a Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kitashirakawa-Oiwake , Sakyo-ku, Kyoto , Japan.
Abstract:
A codon-optimized Aspergillus niger pectin methylesterase (PME) gene was expressed in the methylotrophic yeast Canidia boidinii. The PME-producing strains showed better growth on pectin than the wild-type strains, suggesting that the PME-producing strains could efficiently utilize methyl ester moieties of pectin. On the other hand, overproduction of PME negatively affected the proliferation of C. boidinii on leaves of Arabidopsis thaliana.
Insights
This study expresses Aspergillus niger pectin methylesterase (PME) in yeast, enhancing pectin utilization. However, PME overproduction hinders yeast growth on plant leaves, indicating specific metabolic trade-offs.
Area of Science:
- Biotechnology
- Molecular Biology
- Microbial Engineering
Background:
- Pectin methylesterase (PME) is crucial for pectin degradation.
- Methylotrophic yeasts like Candida boidinii are valuable hosts for heterologous protein expression.
- Understanding PME function in yeast is key for biotechnological applications.
Purpose of the Study:
- To express a codon-optimized Aspergillus niger pectin methylesterase (PME) gene in Candida boidinii.
- To evaluate the impact of PME expression on yeast growth and pectin utilization.
- To assess the effect of PME overproduction on yeast proliferation in a plant-associated environment.
Main Methods:
- Gene synthesis and codon optimization for Aspergillus niger PME.
- Heterologous expression of the PME gene in the methylotrophic yeast Candida boidinii.
- Growth assays on pectin-rich media and Arabidopsis thaliana leaves.
Main Results:
- PME-producing C. boidinii strains exhibited enhanced growth on pectin compared to wild-type strains.
- The enhanced growth suggests efficient utilization of methyl ester groups in pectin by the engineered yeast.
- Conversely, PME overproduction detrimentally affected C. boidinii proliferation on Arabidopsis thaliana leaves.
Conclusions:
- Codon-optimized PME expression in C. boidinii facilitates pectin degradation and utilization.
- PME overproduction presents a metabolic burden impacting yeast fitness in a plant-leaf environment.
- This study highlights the complex metabolic interactions and potential trade-offs of expressing plant-degrading enzymes in microbial hosts.
