Dataset Information

Specificity of the osmotic stress in Candida albicans highlighted by quantitative proteomics - C4PR_LIV

ABSTRACT: Stress adaptation is critical for the survival of microbes in dynamic environments, and in particular, for fungal pathogens to survive in and colonise host niches. Proteomic analyses have the potential to significantly enhance our understanding of these adaptive responses by providing insight into the post-transcriptional regulatory mechanisms that contribute to the outputs as well as testing presumptions about the regulation of protein levels based on transcript profiling. Therefore, in this study we used label-free, quantitative mass spectrometry to re-examine the response of the major fungal pathogen of humans, Candida albicans, to osmotic stress. Of the 1,262 proteins that were identified, 84 (7.7%) were reproducibly down-regulated in response to 1 M NaCl. These changes reflected the decrease in ribosome biogenesis and translation that often accompanies stress exposure. The 64 up-regulated proteins (5.1% of the total) included the glycerol biosynthetic enzymes, Gpd2 and Gpp1/Rhr2, as well as enzymes of central metabolism that may contribute to carbon flux to glycerol, a key osmolyte for this yeast. The up-regulated proteins also included proteins with functions during stress such as Hsp12, Hsp21, Cat1, Gsh2, Glx3 and Tps2, which was consistent with a perturbation of redox homeostasis and increased synthesis of the stress protectant trehalose during salt stress. These data reinforce the view that adaptation to salt stress involves a transient reduction in ribosome biogenesis and translation together with the accumulation of the osmolyte, glycerol. Given the small proportion of C. albicans proteins whose abundances are affected by salt stress, the results highlight the specificity of the metabolic response to salt stress.

INSTRUMENT(S): Synapt MS

ORGANISM(S): Candida Albicans (yeast)

SUBMITTER: Hans Vissers

LAB HEAD: Hans Vissers

PROVIDER: PXD008362 | Pride | 2018-10-22

REPOSITORIES: Pride

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Specificity of the osmotic stress response in Candida albicans highlighted by quantitative proteomics.

Jacobsen Mette D MD Beynon Robert J RJ Gethings Lee A LA Claydon Amy J AJ Langridge James I JI Vissers Johannes P C JPC Brown Alistair J P AJP Hammond Dean E DE

Scientific reports 20180927 1

Stress adaptation is critical for the survival of microbes in dynamic environments, and in particular, for fungal pathogens to survive in and colonise host niches. Proteomic analyses have the potential to significantly enhance our understanding of these adaptive responses by providing insight into post-transcriptional regulatory mechanisms that contribute to the outputs, as well as testing presumptions about the regulation of protein levels based on transcript profiling. Here, we used label-free ...[more]

PMID: 30262823

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Dataset Information

Specificity of the osmotic stress in Candida albicans highlighted by quantitative proteomics - C4PR_LIV

Publications

Specificity of the osmotic stress response in Candida albicans highlighted by quantitative proteomics.

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