Related Experiment Video
Updated: Aug 9, 2025
09:52
Genetic Manipulation in Δku80 Strains for Functional Genomic Analysis of Toxoplasma gondii
Published on: July 12, 2013
17.2K
Converting and hoarding driven by protein phosphorylation in Toxoplasma gondii
1P6: Metabolism of Microbial Pathogens, Robert Koch Institute, 13353, Berlin, Germany.
Trends in Parasitology
|February 22, 2023
Summary
Toxoplasma gondii uses protein phosphatase 2A (PP2A) to evade host defenses and establish persistent infections. This phosphatase regulates dormant stages and sugar storage, crucial for long-term parasite survival.
Area of Science:
- Parasitology
- Molecular Biology
- Immunology
Background:
- Parasitic infections require strategies to overcome host immune responses.
- Toxoplasma gondii is an opportunistic pathogen that establishes lifelong infections in hosts.
- Understanding parasite survival mechanisms is key to developing treatments.
Purpose of the Study:
- To investigate the role of protein phosphatase 2A (PP2A) in Toxoplasma gondii persistence.
- To elucidate how PP2A contributes to the parasite's ability to evade host immunity.
- To identify the specific functions regulated by PP2A during chronic infection.
Main Methods:
- Gene expression analysis to assess PP2A activity.
- Biochemical assays to study PP2A substrate interactions.
- Microscopy and in vivo models to observe parasite development and host response.
Main Results:
- Toxoplasma gondii utilizes PP2A to successfully establish and maintain chronic infections.
- PP2A activity is essential for the development of dormant parasite stages.
- The phosphatase regulates the accumulation of essential nutrient stores, such as sugars, within the parasite.
Conclusions:
- Protein phosphatase 2A is a critical factor for Toxoplasma gondii persistence.
- Targeting PP2A could be a potential strategy to combat chronic toxoplasmosis.
- PP2A's role in regulating parasite dormancy and metabolism offers insights into host-parasite interactions.
More Related Videos
Related Concept Videos
01:37Energy to Drive Translocation
2.1K
Mitochondrial protein import is powered by two distinct energy sources: ATP hydrolysis and electrochemical potential across the inner membrane. Newly synthesized precursors are bound by cytosolic chaperones of the Hsp70 family, which guide them to the import receptors on the mitochondrial surface. Utilizing the energy of ATP hydrolysis, Hsp70 chaperones transfer these precursors to the TOM receptors on the mitochondrial outer membrane.
Generally, polypeptides are unfolded by two distinct...
Generally, polypeptides are unfolded by two distinct...
2.1K
01:19Translocation of Proteins into the Mitochondria
3.2K
Mitochondrial precursors are translocated to the internal subcompartments via independent mechanisms involving distinct protein machineries called translocases.
Sorting of outer membrane proteins:
Mitochondrial outer membrane proteins are of two types: the transmembrane, beta-barrel porins, and the membrane-anchored, alpha-helical proteins. Beta-barrel porin precursors are translocated by the TOM complex and inserted into the outer mitochondrial membrane by the SAM complex. In contrast,...
Sorting of outer membrane proteins:
Mitochondrial outer membrane proteins are of two types: the transmembrane, beta-barrel porins, and the membrane-anchored, alpha-helical proteins. Beta-barrel porin precursors are translocated by the TOM complex and inserted into the outer mitochondrial membrane by the SAM complex. In contrast,...
3.2K
02:54Protein Kinases and Phosphatases
13.3K
Proteins undergo chemical modifications that trigger changes in the charge, structure, and conformation of the proteins. Phosphorylation, acetylation, glycosylation, nitrosylation, ubiquitination, lipidation, methylation, and proteolysis are various protein modifications that regulate protein activity. Such modifications are usually enzyme-driven.
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
13.3K
01:58Mechanical Protein Functions
5.0K
Proteins perform many mechanical functions in a cell. These proteins can be classified into two general categories- proteins that generate mechanical forces and proteins that are subjected to mechanical forces. Proteins providing mechanical support to the structure of the cell, such as keratin, are subjected to mechanical force, whereas proteins involved in cell movement and transport of molecules across cell membranes, such as an ion pump, are examples of generating mechanical force.
5.0K
01:31ATP Energy Storage and Release
10.6K
ATP is a highly unstable molecule. Unless quickly used to perform work, ATP spontaneously dissociates into ADP and inorganic phosphate (Pi), and the free energy released during this process is lost as heat. The energy released by ATP hydrolysis is used to perform work inside the cell and depends on a strategy called energy coupling. Cells couple the exergonic reaction of ATP hydrolysis with endergonic reactions, allowing them to proceed.
One example of energy coupling using ATP involves a...
One example of energy coupling using ATP involves a...
10.6K
01:02Phosphorylation
50.7K
The addition or removal of phosphate groups from proteins is the most common chemical modification that regulates cellular processes. These modifications can affect the structure, activity, stability, and localization of proteins within cells as well as their interactions with other proteins.
During phosphorylation, protein kinases transfer the terminal phosphate group of ATP to specific amino acid side chains of substrate proteins. Serine, threonine, and tyrosine are the most commonly...
During phosphorylation, protein kinases transfer the terminal phosphate group of ATP to specific amino acid side chains of substrate proteins. Serine, threonine, and tyrosine are the most commonly...
50.7K