Ji Q, Mai J, Ding Y, Wei Y, Ledesma-Amaro R, Ji XJ. Improving the homologous recombination efficiency of
Yarrowia lipolytica by grafting heterologous component from
Saccharomyces cerevisiae.
Metab Eng Commun 2020;
11:e00152. [PMID:
33294367 PMCID:
PMC7691175 DOI:
10.1016/j.mec.2020.e00152]
[Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 11/07/2020] [Accepted: 11/09/2020] [Indexed: 12/17/2022] Open
Abstract
The oleaginous non-conventional yeast Yarrowia lipolytica has enormous potential as a microbial platform for the synthesis of various bioproducts. However, while the model yeast Saccharomyces cerevisiae has very high homologous recombination (HR) efficiency, non-homologous end-joining is dominant in Y. lipolytica, and foreign genes are randomly inserted into the genome. Consequently, the low HR efficiency greatly restricts the genetic engineering of this yeast. In this study, RAD52, the key component of the HR machinery in S. cerevisiae, was grafted into Y. lipolytica to improve HR efficiency. The gene ade2, whose deletion can result in a brown colony phenotype, was used as the reporter gene for evaluating the HR efficiency. The HR efficiency of Y. lipolytica strains before and after integrating the ScRad52 gene was compared using insets with homology arms of different length. The results showed that the strategy could achieve gene targeting efficiencies of up to 95% with a homology arm length of 1000 bp, which was 6.5 times of the wildtype strain and 1.6 times of the traditionally used ku70 disruption strategy. This study will facilitate the further genetic engineering of Y. lipolytica to make it a more efficient cell factory for the production of value-added compounds.
The gene ade2 was chose as the reporter gene for evaluating the HR efficiency.
RAD52 governing the HR machinery in S. cerevisiae was grafted into Y. lipolytica.
RAD52 could improve the HR efficiency of Y. lipolytica.
It was better than the traditionally used ku70 disruption strategy.
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