Yong-Jun Zhong, Yang-Yang Luo, Haiyang Xia, Qing-Wei Zhao, Xu-Ming Mao
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Cytokinetic engineering enhances the secretory production of recombinant human lysozyme in Komagataella phaffii.
Background: Human lysozyme (hLYZ) is a natural antibacterial protein with broad applications in food and pharmaceutical industries. Recombinant production of hLYZ in Komagataella phaffii (K. phaffii) has attracted considerable attention, but there are very limited strategies for its hyper-production in yeast.
Results: Here through Atmospheric and Room Temperature Plasma (ARTP)-based mutagenesis and transcriptomic analysis, the expression of two genes MYO1 and IQG1 encoding the cytokinesis core proteins was identified downregulated along with higher hLYZ production. Deletion of either gene caused severe cytokinesis defects, but significantly enhanced hLYZ production. The highest hLYZ yield of 1,052,444 ± 23,667 U/mL bioactivity and 4.12 ± 0.11 g/L total protein concentration were obtained after high-density fed-batch fermentation in the Δmyo1 mutant, representing the best production of hLYZ in yeast. Furthermore, O-linked mannose glycans were characterized on this recombinant hLYZ.
Conclusions: Our work suggests that cytokinesis-based morphology engineering is an effective way to enhance the production of hLYZ in K. phaffii.
期刊介绍:
Microbial Cell Factories is an open access peer-reviewed journal that covers any topic related to the development, use and investigation of microbial cells as producers of recombinant proteins and natural products, or as catalyzers of biological transformations of industrial interest. Microbial Cell Factories is the world leading, primary research journal fully focusing on Applied Microbiology.
The journal is divided into the following editorial sections:
-Metabolic engineering
-Synthetic biology
-Whole-cell biocatalysis
-Microbial regulations
-Recombinant protein production/bioprocessing
-Production of natural compounds
-Systems biology of cell factories
-Microbial production processes
-Cell-free systems