Deletion of the gene encoding cytochrome b562 from Rhodobacter sphaeroides |
| |
Authors: | Chang-Hyon Yun Blanca Barquera Koh Iba Ken-ichiro Takamiya James Shapleigh Antony R. Crofts Robert B. Gennis |
| |
Affiliation: | All-Russian Collection of Microorganisms, Institute for Biochemistry, Russia; Physiology of Microorganisms, Russian Academy of Sciences, Pushchino, 142292, Russia |
| |
Abstract: | Abstract Cryptococcus humicola strains secrete killer toxins inhibitory (at pH values ranging from 3 to 5.5) to many ascomycetous and basidiomycetous yeast-like fungi. RNA or DNA plasmids were not detected in the killers. The amino acid-containing toxins were of low M r, soluble in methanol, resistant to proteolysis, thermostable, cellophane-diffusible and were specified as microcins. These findings show that the killer phenomenon in yeasts such as bacteriocinogeny may be due to excretion of two types of killer toxins: mycocins and microcins. |
| |
Keywords: | Microcin Killer phenomenon Cryptococcus humicola Yeast |
|
|