Determination of the efficient enzyme concentration for lytic digestion of vegetative cells but not spores in Schizosaccharomyces pombe.

Miroslava Požgajová, Alica Navratilova, Anna Trakovicka


Received: 2016-05-24 | Accepted: 2016-05-30 | Available online: 2017-06-20–22

The fact that lytic enzymes such as b-glucuronidase are capable of cell wall lysis, while the integrity of the spore is not affected, is used in the spore viability tests to investigate meiotic processes. Meiosis as a fundamental feature in all living organisms comprises of a complex tightly linked and mutually dependent processes most of which are scientific targets of many research institutions. The fission yeast Shizosaccharomyces pombe is a powerful tool for studies on eukaryotic meiosis. Mating of yeast strains of opposite mating types on nitrogen free medium results in spores production. Whereas not all cells undergo meiosis, some cells persist in vegetative stage even in the absence of nitrogen, this leads to generation of a mixed suspension of vegetative cells and spores. Thus, in order to separate spores from vegetative cells obtained mixture was exposed to lytic enzyme action. This treatment kills vegetative cells without affecting spores. To obtain the best and reproducible results of spore recovery and viability, different lytic conditions were analysed. Obtained results show, that use of b-glucuronidase as lytic enzyme for random spore analyses in the fission yeast is dose and time dependent.

Keywords: b-glucuronidase, cell cycle, spore viability, Schizosaccharomycesn pombe


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