célula hospedeira eucariótica oleaginosa transgênica, célula de levedura eucariótica oleaginosa transgênica, óleo ou lipídeos, método para aumentar o teor de lipídeo total de uma célula hospedeira eucariótica oleaginosa e método para aumentar o teor total de ácidos graxos poliinsaturados no óleo microbiano

摘要

Methods of increasing the total lipid content in a eukaryotic cell, the total content of polyunsaturated fatty acids ["PUFAs"], and/or the ratio of desaturated fatty acids to saturated fatty acids by reducing the activity of the heterotrimeric SNF1 protein kinase are disclosed. Preferably, the chromosomal genes encoding the Snf1 alpha-subunit, Gal83 beta-subunit or Snf4 gamma-subunit of the SNF1 protein kinase, the upstream regulatory genes encoding Sak1, Hxk2, Glk1 or Reg1, or the downstream genes encoding Rme1, Cbr1 or Snf3 are manipulated in a PUFA-producing strain of the oleaginous yeast Yarrowia lipolytica, resulting in increased total lipid content, as compared to the parent strain comprising the heterotrimeric SNF1 protein kinase not having reduced activity.