Proteomics

Dataset Information

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Identifying the impact of cadmium stress on the pneumococcal metalloproteome


ABSTRACT: The toxicity of the heavy metal cadmium is well established. However, the molecular basis for how this toxicity perturbs cellular viability is still not well understood. This project investigates the cellular and molecular impacts of cadmium stress in the bacterial pathogen, Streptococcus pneumoniae. We find that cadmium depletes cellular manganese and zinc stores, leading to disruption of metalloproteins and the corresponding biochemical pathways. Furthermore, the over-accumulation of cadmium within the cells appears to facilitate mismetallation events, whereby native metal cofactors are displaced by cadmium, leading to reduced or abrogated enzymatic activity. These metalloproteomic analyses have been conducted in conjunction with transcriptomics and metabolomics to elucidate the global impacts of cadmium stress within a prokaryotic organism.

INSTRUMENT(S): Q Exactive HF

ORGANISM(S): Streptococcus Pneumoniae Serotype 2 (strain D39 / Nctc 7466)

SUBMITTER: Stephanie Neville  

LAB HEAD: Christopher A. McDevitt

PROVIDER: PXD021643 | Pride | 2021-06-25

REPOSITORIES: Pride

Dataset's files

Source:
Action DRS
141009_amber_ua_f34.raw Raw
FTerlfTOT.mgf Mgf
FTerlfTaS.mgf Mgf
FTerlfTnO.mgf Mgf
FTerlfTne.mgf Mgf
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Publications

Cadmium stress dictates central carbon flux and alters membrane composition in Streptococcus pneumoniae.

Neville Stephanie L SL   Eijkelkamp Bart A BA   Lothian Amber A   Paton James C JC   Roberts Blaine R BR   Rosch Jason W JW   McDevitt Christopher A CA  

Communications biology 20201119 1


Metal ion homeostasis is essential for all forms of life. However, the breadth of intracellular impacts that arise upon dysregulation of metal ion homeostasis remain to be elucidated. Here, we used cadmium, a non-physiological metal ion, to investigate how the bacterial pathogen, Streptococcus pneumoniae, resists metal ion stress and dyshomeostasis. By combining transcriptomics, metabolomics and metalloproteomics, we reveal that cadmium stress dysregulates numerous essential cellular pathways in  ...[more]

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