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Isolation of F1-ATPase from the Parasitic Protist Trypanosoma brucei
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The mitochondrial phosphate carrier TbMCP11 is essential for mitochondrial function in the procyclic form of

Fei Gao1, Frank Voncken2, Claudia Colasante3

  • 1Department of Neuroscience, University of Cambridge, Cambridge Biomedical Campus, Hills Road, Cambridge, CB2 0AH, United Kingdom.

Molecular and Biochemical Parasitology
|May 1, 2020
PubMed

Insights

The mitochondrial phosphate transporter TbMCP11 is essential for Trypanosoma brucei viability, ATP synthesis, and cell division. Depleting TbMCP11 halts kinetoplast DNA replication and cytokinesis, crucial for parasite survival.

Area of Science:

  • Mitochondrial biology
  • Parasitology
  • Molecular genetics

Background:

  • Mitochondrial carrier proteins (SLC25A) import solutes into mitochondria.
  • Trypanosoma brucei has 26 SLC25A proteins (TbMCPs); TbMCP11 and TbMCP8 are predicted phosphate importers.
  • Mitochondrial inorganic phosphate import is vital for ATP synthesis and cell viability.

Purpose of the Study:

  • To functionally characterize TbMCP11 in Trypanosoma brucei.
  • To investigate the role of TbMCP11 in inorganic phosphate transport and its impact on parasite biology.

Main Methods:

  • RNA interference (RNAi) to deplete TbMCP11.
  • Measurement of ATP synthesis and oxygen consumption.
  • Functional complementation in yeast and mitochondrial swelling assays.
  • Analysis of kinetoplast DNA replication and cytokinesis.

Main Results:

  • RNAi depletion of TbMCP11 blocked ATP synthesis and reduced oxygen consumption in procyclic T. brucei.
  • TbMCP11 functions as an inorganic phosphate carrier, confirmed by yeast complementation and swelling experiments.
  • TbMCP11 depletion caused a severe defect in kinetoplast DNA replication and cytokinesis.

Conclusions:

  • TbMCP11 is an essential inorganic phosphate transporter in Trypanosoma brucei mitochondria.
  • TbMCP11 plays a critical role in maintaining parasite viability, energy metabolism, and cell division.
  • Targeting TbMCP11 could be a potential strategy against African trypanosomiasis.
Keywords:
CytokinesisEnergy metabolismMitochondrial carrier familyMitochondrial membrane potentialPhosphate transportTrypanosoma brucei

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