Proteomics

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Functional characterization of microbial communities from glacial ecosystems

ABSTRACT: Glaciers are populated by a large number of microorganisms including bacteria, archaea and microeukaryotes. Several factors such as solar radiation, nutrient availability and water content greatly determine the diversity and abundance of these microbial populations, the type of metabolism and the biogeochemical cycles. In order to study their metabolic potentials, samples of glacial ice were taken from several glacial ecosystems. Microorganisms were analyzed by a polyphasic approach that combines a set of -omic techniques: 16S rRNA sequencing, culturomics and metaproteomics. This combination provides key information about diversity and functions of microbial populations, especially in rare habitats. Several whole essential proteins and enzymes related to metabolism and energy production, recombination and translation were found that demonstrate the existence of cellular activity at subzero temperatures.

INSTRUMENT(S): autoflex

ORGANISM(S): Environmental Samples

SUBMITTER: Eva Garcia  

LAB HEAD: Cristina Cid Sanchez

PROVIDER: PXD033406 | Pride | 2023-03-11

REPOSITORIES: Pride

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Publications

The hidden microbial ecosystem in the perennial ice from a Pyrenean ice cave.

Ruiz-Blas Fátima F   Muñoz-Hisado Víctor V   Garcia-Lopez Eva E   Moreno Ana A   Bartolomé Miguel M   Leunda Maria M   Martinez-Alonso Emma E   Alcázar Alberto A   Cid Cristina C  

Frontiers in microbiology 20230126

Over the last years, perennial ice deposits located within caves have awakened interest as places to study microbial communities since they represent unique cryospheric archives of climate change. Since the beginning of the twentieth century, the temperature has gradually increased, and it is estimated that by the end of this century the increase in average temperature could be around 4.0°C. In this context of global warming the ice deposits of the Pyrenean caves are undergoing a significant reg  ...[more]

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