Proteomics

Dataset Information

0

Ubiquitination in treated T. cruzi parasites


ABSTRACT: T. cruzi epimastigotes in the logarithmic growth phase (3×106 cells mL-1) were incubated for 12h with bortezomib (1.8 µM), GNF6702 (2.9 µM) or compound 1 (24 µM), equivalent to 8× the EC50 values of each compound. Controls were incubated in the presence of diluent (DMSO). Cells were harvested by centrifugation (1912g, 15 min, 4 °C) and washed with ice-cold PBS (1912g, 5 min, 4 °C), and finally, the cell pellets were resuspended in 1.5 mL of ice-cold lysis buffer (1 mM EDTA, 1 mM DTT, 100 μM TLCK, and 1× Roche EDTA-free cOmplete protease inhibitor cocktail in 50 mM potassium phosphate buffer, pH 7.4). Cell suspensions were submitted to 3 freeze–thaw cycles in a dry ice/ethanol bath to biologically inactivate the parasites and then lysed using the One ShotTM Cell disruptor (Constant Systems, UK) at 30 kpsi.

INSTRUMENT(S): Q Exactive HF

ORGANISM(S): Trypanosoma Cruzi Dm28c

SUBMITTER: Victoriano Corpas-Lopez  

LAB HEAD: Susan Wyllie

PROVIDER: PXD027524 | Pride | 2022-02-17

REPOSITORIES: Pride

Dataset's files

Source:
Action DRS
VCL-TcUb-Total.raw Raw
VCL-TcUb-UBI-Enriched.raw Raw
mqpar_ubiEnriched.xml Xml
mqpar_ubitotal.xml Xml
txt_ubiEnriched.zip Other
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Publications


Phenotypic screening identified an arylsulfonamide compound with activity against Trypanosoma cruzi, the causative agent of Chagas' disease. Comprehensive mode of action studies revealed that this compound primarily targets the T. cruzi proteasome, binding at the interface between β4 and β5 subunits that catalyze chymotrypsin-like activity. A mutation in the β5 subunit of the proteasome was associated with resistance to compound 1, while overexpression of this mutated subunit also reduced suscep  ...[more]

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