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Študij vpliva povečane koncentracije beljakovin sinI in sinR na raven biosinteze bacitracina pri bakteriji Bacillus licheniformis
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Bakterije rodu Bacillus so po Gramu pozitivni sporulirajoči bacili. Zelo dobro se prilagajajo različnim spremembam v okolju: pomanjkanju hranil, spremembam temperature in vrednosti pH. Pri bakteriji Bacillus licheniformis se proizvodnja peptidnega antibiotika bacitracina začne v pozni logaritemski fazi rasti in se konča med stacionarno fazo. Njegova biosinteza se ujema s proizvodnjo alkalne proteinaze. Da bi določili možne dejavnike s pozitivnim delovanjem glede na biosintezo bacitracina v bakteriji B. licheniformis, smo izvedli poskus z izražanjem genov, ki sodelujejo v procesih sporulacije in kompetence v B. subtilis. B. licheniformis smo transformirali s plazmidi pIS74 (sinIR) in pIS119 (sinR). Oba plazmida v bakterijah B. subtilis in B. licheniformis povzročata fenotip Spo-, zato se je pri rekombiniranih sevih B. licheniformis znižala aktivnost alkalne proteinaze in vsebnost bacitracina.
Title: Študij vpliva povečane koncentracije beljakovin sinI in sinR na raven biosinteze bacitracina pri bakteriji Bacillus licheniformis
Description:
Bakterije rodu Bacillus so po Gramu pozitivni sporulirajoči bacili.
Zelo dobro se prilagajajo različnim spremembam v okolju: pomanjkanju hranil, spremembam temperature in vrednosti pH.
Pri bakteriji Bacillus licheniformis se proizvodnja peptidnega antibiotika bacitracina začne v pozni logaritemski fazi rasti in se konča med stacionarno fazo.
Njegova biosinteza se ujema s proizvodnjo alkalne proteinaze.
Da bi določili možne dejavnike s pozitivnim delovanjem glede na biosintezo bacitracina v bakteriji B.
licheniformis, smo izvedli poskus z izražanjem genov, ki sodelujejo v procesih sporulacije in kompetence v B.
subtilis.
B.
licheniformis smo transformirali s plazmidi pIS74 (sinIR) in pIS119 (sinR).
Oba plazmida v bakterijah B.
subtilis in B.
licheniformis povzročata fenotip Spo-, zato se je pri rekombiniranih sevih B.
licheniformis znižala aktivnost alkalne proteinaze in vsebnost bacitracina.
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