Related Experiment Video
Updated: Aug 10, 2025
09:52
Genetic Manipulation in Δku80 Strains for Functional Genomic Analysis of Toxoplasma gondii
Published on: July 12, 2013
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Toxoplasma gondii AP2XII-2 Contributes to Transcriptional Repression for Sexual Commitment
Sandeep Srivastava1, Michael J Holmes1, Michael W White2
1Department of Pharmacology and Toxicology, Indiana University School of Medicine, Indianapolis, Indiana, USA.
Msphere
|February 14, 2023
Summary
A newly identified transcription factor, AP2XII-2, is crucial for regulating the sexual development of the parasite Toxoplasma gondii. This finding advances understanding of parasite transmission and potential therapeutic targets for toxoplasmosis.
Area of Science:
- Parasitology
- Molecular Biology
- Epigenetics
Background:
- Toxoplasma gondii is a widespread protozoan parasite impacting human and animal health.
- Understanding parasite life cycle transitions, particularly sexual development in cats, is key to controlling transmission.
- Epigenetic factors regulate gene expression during parasite development, but recruitment mechanisms are unclear.
Purpose of the Study:
- To identify specific factors that recruit epigenetic machinery for gene silencing during T. gondii sexual development.
- To investigate the role of AP2XII-2 in regulating sexual stage-specific gene expression.
Main Methods:
- Utilized CUT&Tag (cleavage under targets and tagmentation) methodology.
- Investigated the genomic localization of AP2XII-2 with epigenetic regulators HDAC3 and MORC.
- Assessed the requirement of AP2XII-2 for the expression of sexual development-associated genes.
Main Results:
- AP2XII-2 is recruited to genomic loci with epigenetic repressors (HDAC3, MORC) in sexually committed parasites.
- AP2XII-2 is essential for silencing a subset of genes, including AP2X-10 and AAH1.
- Identified AP2X-10 and AAH1 as key downstream targets of AP2XII-2 involved in sexual development.
Conclusions:
- AP2XII-2 is a critical transcription factor controlling gene regulatory pathways for T. gondii sexual development.
- This research elucidates a key mechanism in parasite stage transition, offering potential targets for intervention.
- Understanding AP2XII-2 function is vital for developing strategies against toxoplasmosis and parasite transmission.
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