Related Experiment Video
Updated: Jan 13, 2026
Culturing and Genetically Manipulating Entomopathogenic Nematodes
Published on: March 31, 2022
EnP1 exploits H2Aub-dependent epigenetic reprogramming to promote microsporidia proliferation in host cells
Jingyu Guan1, Yongliang Wang1, Ming Fu1
1Department of Pathogenic Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China.
Abstract:
Microsporidia, as opportunistic parasitic pathogens, constitute a formidable threat to human health. Although the regulatory circuitry of the nucleus-targeted effector EnP1 remains highly intricate and only partially characterized, our study identifies histone H2A as a novel binding partner of EnP1. Furthermore, we demonstrate that both EnP1 overexpression and microsporidia infection induce monoubiquitination of H2A (H2Aub) through downregulation of BAP1 expression. Subsequent mechanistic analyses revealed that elevated H2Aub levels positively correlate with enhanced microsporidian proliferation, whereas attenuation of H2Aub markedly suppresses pathogen expansion. Furthermore, EnP1 orchestrates the enrichment of H2Aub at the SLC7A11 promoter, driving its transcriptional upregulation. Collectively, these findings underscore that EnP1 modulates the ferroptosis state of host cells through H2Aub-mediated epigenetic reprogramming, ultimately facilitating pathogen propagation. This study endeavors to elucidate the critical survival strategies of microsporidia within host cells mediated by EnP1 and to unravel the multifaceted interplay between these pathogens and their hosts.
Insights
Microsporidia use the EnP1 effector to modify host cell epigenetics by increasing histone H2A monoubiquitination (H2Aub). This epigenetic reprogramming promotes microsporidian proliferation and survival within host cells.
Area of Science:
- Microbiology
- Epigenetics
- Parasitology
Background:
- Microsporidia are opportunistic pathogens posing significant health risks.
- The nucleus-targeted effector EnP1's regulatory role is not fully understood.
Purpose of the Study:
- Identify novel binding partners of EnP1.
- Elucidate the mechanism by which EnP1 influences host cells.
- Understand microsporidian survival strategies.
Main Methods:
- Identified histone H2A as an EnP1 binding partner.
- Investigated the effect of EnP1 and microsporidia infection on H2A ubiquitination.
- Analyzed the correlation between H2Aub levels and microsporidian proliferation.
- Examined EnP1's role in regulating the SLC7A11 promoter.
Main Results:
- EnP1 binds to histone H2A.
- EnP1 and microsporidia infection induce H2Aub via BAP1 downregulation.
- Elevated H2Aub correlates with increased microsporidian proliferation.
- EnP1 drives H2Aub enrichment at the SLC7A11 promoter, increasing its transcription.
- EnP1 modulates host cell ferroptosis through H2Aub-mediated epigenetic changes.
Conclusions:
- EnP1 facilitates microsporidian propagation by epigenetically reprogramming host cells.
- H2Aub is a key mediator of EnP1's function in host-pathogen interactions.
- The study reveals critical survival mechanisms of microsporidia.
More Related Videos
Related Concept Videos
01:28Fungal Phylum Microsporidia
01:37Epigenetic Regulation
X-chromosome...
01:46Epigenetic Regulation