Project description:Comparative proteomics analysis to evaluate the influence of varying culture conditions on a planktonic freshwater dwelling bacterium, Polynucleobacter asymbioticus that belongs to the class Gammaproteobacteria. In the present study, a type strain Polynucleobacter asymbioticus strain QLW-P1DMWA-1T (= DSM 18221 = CIP 10981) was cultured in triplicates in sterile UV-permeable polyethylene bags (~35% permeability; Whirl-Pak®, Nasco). Culturing was carried out at 4°C, 26°C and 26° C plus 30 minutes of ultraviolet radiation exposure two times a day using 100W ARIMED® B UV lamps (Cosmedico®, Germany). We have applied mass spectrometry based large-scale screening of proteins to investigate to better understanding of the survival nature of this microbe.
Project description:Polynucleobacter asymbioticus strain QLW-P1DMWA-1T represents a group of highly successful heterotrophic planktonic bacteria, dwelling in freshwater systems (lakes, ponds, and streams) across all climatic zones and across all continents. This includes habitats characterised by strongly fluctuating environmental conditions. So the experiments were designed to mimick winter and summer scenarios with additional impact of UV irradiation. Comparative transcriptomic studies were conducted to analyse gene-expression levels in contrasting experimental conditions. Overall, molecular candidates were revealed that may contribute in rapid acclimatisation of this strain in their immediate environment.
