PLOS Genetics study characterises GTBP-1 role in heat stress response and germline P-body dynamics in C. elegans
Researchers describe how GTBP-1, the C. elegans homologue of human stress-granule protein G3BP1, relocates to perinuclear P-bodies under heat stress and influences reproductive homeostasis.
A peer-reviewed study published in PLOS Genetics by Diya Zang, Yifan Jing, and colleagues characterises GTBP-1, the Caenorhabditis elegans homologue of the human RNA-binding protein G3BP1, and investigates its contributions to heat stress responses in the nematode germline.
The authors show that gtbp-1 mutants display temperature-dependent reproductive phenotypes, suggesting that GTBP-1 function becomes particularly important under thermal stress. Under heat stress conditions, GTBP-1 associates with perinuclear P-bodies — constitutive cytoplasmic RNA granules distinct from the stress granules with which G3BP1 family proteins are more commonly associated in somatic cells. This perinuclear P-body localisation implies a specialised role for GTBP-1 in germline RNA regulation that may differ from its somatic counterparts.
Stress granules and P-bodies are dynamic ribonucleoprotein condensates that compartmentalise mRNA and associated factors, but their regulation and function in the germline have been less thoroughly studied than in somatic tissues. This work adds to a growing body of literature exploring how RNA granule biology intersects with reproductive resilience and germline homeostasis.
G3BP1 is conserved across metazoans, and the C. elegans model offers tractable genetics for dissecting granule-assembly mechanisms. The study was published in PLOS Genetics on 7 October 2026.
Sources
Read the original reporting — these are the public sources this summary draws from.
-
Primary source Public Library of Science · 2026-10-07Heat stress promotes GTBP-1 association with perinuclear P-bodies in the C. elegans germline