Dataset Information

Phosphoproteome and proteome of T. cruzi metacyclogenesis

ABSTRACT: Trypanosoma cruzi metacyclogenesis is a natural process that occurs inside triatomine insect vector and corresponds to the differentiation of non-infective epimastigotes into infective metacyclic trypomastigotes. Here, centered on LC-MS/MS approach, a large scale phospho (proteome) study was carried out aiming to quantitatively understand the metacyclogenesis. Cells were colected along metacyclogenesis totalizing six points, stress 2 hours, adhered 12, 24 and 48 hours, and metacyclic trypomastigote from two biological replicates. After extraction, total protein were digested, fractioned and analyzed by LC-MS/MS. The samples for phosphoproteomics were processed for phosphopeptide enrichment prior to the analysis.

INSTRUMENT(S): LTQ Orbitrap XL ETD

ORGANISM(S): Trypanosoma Cruzi Dm28c

SUBMITTER: juliana carolina amorim

LAB HEAD: Fabricio Klerynton Marchini

PROVIDER: PXD006171 | Pride | 2017-08-31

REPOSITORIES: Pride

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Quantitative proteome and phosphoproteome analyses highlight the adherent population during Trypanosoma cruzi metacyclogenesis.

Amorim Juliana C JC Batista Michel M da Cunha Elizabeth S ES Lucena Aline C R ACR Lima Carla V de Paula CVP Sousa Karla K Krieger Marco A MA Marchini Fabricio K FK

Scientific reports 20170829 1

Trypanosoma cruzi metacyclogenesis is a natural process that occurs inside the triatomine vector and corresponds to the differentiation of non-infective epimastigotes into infective metacyclic trypomastigotes. The biochemical alterations necessary for the differentiation process have been widely studied with a focus on adhesion and nutritional stress. Here, using a mass spectrometry approach, a large-scale phospho(proteome) study was performed with the aim of understanding the metacyclogenesis p ...[more]

PMID: 28852088

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Project description:Trypanosoma cruzi, the etiological agent of Chagas disease, has a complex life cycle occurring between triatomine insects (responsible for the vectorial transmission of the infection) and mammals. Inside the insect vector, epimastigote forms (proliferative, non-infective to mammals) differentiate into metacyclic trypomastigotes forms (non-proliferative, infective to mammals). This differentiation process happens at the final portion of insect vector’s gut and it is crucial for the progress of T. cruzi life cycle. Factors that play a role in metacyclogenesis include temperature, pH and nutritional stress followed by availability of specific metabolites. Previous results showed that some amino acids such as Pro, His and Gln are able to fully support cell differentiation whereas the BCAAs completely block it. In addition, combination of the “pro-metacyclogenic” amino acid Pro with one of the “anti-metacyclogenic” BCAAs produces viable metacyclics, however, with a drastically reduced infectivity. In order to investigate the peculiarities of metacyclic parasites differentiated in the presence of BCAAs, we performed proteomics analyses to compare metacyclics obtained in triatomine artificial urine (TAU) supplemented with Pro alone and in combination with Leu, Ile or Val. Our analyses revealed that when compared to the metacyclics originated in TAU-Pro, 40 proteins are differentially regulated in metacyclics from TAU-Pro-Leu, whereas 131 and 179 are differentially regulated in TAU-Pro-Ile and TAU-Pro-Val, respectively. From each group, 22, 11 and 13% of the proteins are putatively related to metabolic processes, respectively. Overall, enzymes involved in both glycolysis and TCA cycle are reduced in metacyclics obtained in the presence of Pro-BCAAs whereas enzymes involved in amino acid and purine metabolic pathways are increased. In addition, metacyclics obtained in the presence of Pro-Ile and Pro-Val have enzymes involved in lipid and redox metabolism increased. Together our analyses indicate that metacyclics obtained in the presence of BCAA can have their metabolism reshaped, which in turn can contribute to the reduced infectivity observed in these parasites.

			Action	DRS
	Non_phospho.zip	Other
	Phospho.zip	Other
	Tc_Phospho_Ad12hR1_1_1.RAW	Raw
	Tc_Phospho_Ad12hR1_1_2.RAW	Raw
	Tc_Phospho_Ad12hR1_2_1.RAW	Raw