[The extracellular protein of Luteococcus japonicus subsp casei reactivates cells inactivated by ultraviolet radiation or heating].
The culture liquid of Luteococcus japonicus subsp. casei was found to be able to reactivate cells of this bacterium inactivated by UV irradiation or heat shock. The antistress activity of the culture liquid was due to the presence of an extracellular exometabolite of a protein nature with a molecular mass of more than 10 kDa. When the bacterium was grown in nutrient broth or glucose-containing mineral medium, the antistress protein was secreted by cells in the logarithmic growth phase. The reactivating effect of the antistress protein was inversely proportional to the survival rate of stressed cells.
Vorob'eva
L I
LI
Department of Microbiology, Faculty of Biology, Moscow State University, Vorob'evy gory, Moscow, 119899 Russia.
Khodzhaev
E Iu
EIu
Ponomareva
G M
GM
D000222:Adaptation, Physiological; D003470:Culture Media / Q000032:analysis; D006360:Heat-Shock Proteins / Q000032:analysis / Q000096:biosynthesis* / Q000737:chemistry; D006358:Hot Temperature; D008970:Molecular Weight; D011423:Propionibacteriaceae / Q000254:growth & development / Q000502:physiology* / Q000528:radiation effects*; D014466:Ultraviolet Rays
D003470:Culture Media; D006360:Heat-Shock Proteins