Water-forming NADH oxidase protects Torulopsis glabrata against hyperosmotic stress.
A heterologous water-forming NADH oxidase was introduced into Torulopsis glabrata and the effect on cell growth under hyperosmotic conditions was investigated. Expression of the noxE gene from Lactococcus lactis NZ9000 in T. glabrata resulted in a marked decrease in the NADH : NAD+ ratio and higher activities of key enzymes in water-regenerating pathways, leading to an increase in intracellular water content. NaCl-induced reactive oxygen species production was also decreased by the introduction of NADH oxidase, resulting in a significant increase in the growth of T. glabrata under hyperosmotic stress conditions (3824 mOsmol/kg). The results indicated that the osmotolerance of cells can be enhanced by manipulating water-production pathways.
Xu
Sha
S
State Key Laboratory of Food Science and School of Biotechnology and Key Technology and Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, People's Republic of China.
Zhou
Jingwen
J
Qin
Yi
Y
Liu
Liming
L
Chen
Jian
J
D001426:Bacterial Proteins / Q000235:genetics / Q000378:metabolism*; D041221:Candida glabrata / Q000235:genetics / Q000502:physiology*; D015870:Gene Expression; D013294:Lactococcus lactis / Q000201:enzymology*; D009097:Multienzyme Complexes / Q000235:genetics / Q000378:metabolism*; D009243:NAD / Q000378:metabolism; D009247:NADH, NADPH Oxidoreductases / Q000235:genetics / Q000378:metabolism*; D009997:Osmotic Pressure; D014867:Water / Q000378:metabolism*
D001426:Bacterial Proteins; D009097:Multienzyme Complexes; D014867:Water; D009243:NAD; C023107:NADH oxidase; D009247:NADH, NADPH Oxidoreductases