15 research outputs found
The resistance of viable permafrost algae to simulated environmental stresses: implications for astrobiology
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Experimental modeling of the bacterial community translocation during freezing and thawing of peat permafrost soils of Western Siberia
No full textPredicted bacteriorhodopsin from Exiguobacterium sibiricum is a functional proton pump
Get PDFAbstractThe predicted Exigobacterium sibiricum bacterirhodopsin gene was amplified from an ancient Siberian permafrost sample. The protein bacteriorhodopsin from Exiguobacterium sibiricum (ESR) encoded by this gene was expressed in Escherichia coli membrane. ESR bound all-trans-retinal and displayed an absorbance maximum at 534nm without dark adaptation. The ESR photocycle is characterized by fast formation of an M intermediate and the presence of a significant amount of an O intermediate. Proteoliposomes with ESR incorporated transport protons in an outward direction leading to medium acidification. Proton uptake at the cytoplasmic surface of these organelles precedes proton release and coincides with M decay/O rise of the ESR
Late-Holocene glacier growth in Svalbard, documented by subglacial relict vegetation and living soil microbes
No full textA repository for Antarctic glacio-climatic history - anatomy of the Mount Feather diamiction, Southern Victoria Land
No full textA repository for Antarctic glacio-climatic history - anatomy of the Mount Feather diamiction, Southern Victoria Land
No full textViability, diversity and composition of the bacterial community in a high Arctic permafrost soil from Spitsbergen, Northern Norway
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