ArticleProceedings of the National Academy of Sciences of the United States of America2025
HEIP1 orchestrates pro-crossover protein activity during mammalian meiosis.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
- Disordered protein COSA-2 maintains crossover-specific repair compartments to ensure meiotic crossover maturation.bioRxiv : the preprint server for biology · 2026Article
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Abstract
Meiotic crossovers (COs) are needed to produce genetically balanced gametes. In mammals, CO formation is mediated by a conserved set of pro-CO proteins via mechanisms that remain unclear. Here, we characterize a mammalian pro-CO factor HEIP1. In mouse HEIP1 is essential for crossover and fertility of both sexes. HEIP1 promotes crossover by orchestrating the recruitment of other pro-CO proteins, including the MutSγ complex (MSH4-MSH5) and E3 ligases (HEI10, RNF212, and RNF212B), that are required to mature CO sites and recruit the CO-specific resolution complex MutLγ. Moreover, HEIP1 directly interacts with HEI10, suggesting a direct role in controlling the recruitment of pro-CO E3 ligases. During early stages of meiotic prophase I, HEIP1 interacts with the chromosome axes, independently of recombination, before relocalizing to the central region of the synaptonemal complex. We propose that HEIP1 is a conserved master regulator of CO proteins that controls different CO maturation steps.
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