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Updated: Aug 14, 2026
A Rapid Protocol for Integrating Extrachromosomal Arrays With High Transmission Rate into the C. elegans Genome
Published on: December 9, 2013
Design of vectors for efficient integration and transformation in Hansenula polymorpha
Yueyong Liu1, Yong Li, Liyue Liu
1Molecular Microbiological Center, Institute of Microbiology, Chinese Academy of Sciences, 13# Zhongguancun Beiyitiao, 100080, Beijing, PR China.
Abstract:
Four vectors were constructed for high-level expression of heterologous proteins with high copy number and mitotic stability in Hansenula polymorpha. All of them contained the conserved H. polymorpha-derived ribosomal DNA (rDNA) sequence for targeting and the geneticin (G418) resistance gene as a selection marker. A strong inducible promoter, formate dehydrogenase (FMD) promoter from H. polymorpha, was used to drive the expression of heterologous genes; the formate dehydrogenase terminator of H. polymorpha was used as the transcription termination region. A modified green fluorescent protein (mGFP) and firefly luciferase protein (Luc) were used as the marker to evaluate the efficacy of these vectors. Using Southern blotting analysis, 2-30 copies of these vectors were integrated into rDNA loci. These results demonstrated that all the four vectors could be used as candidates for expression of desired proteins in H. polymorpha.
