ArticleDevelopmental dynamics : an official publication of the American Association of Anatomists2025
Genomic evolution of EGF-CFC genes in deuterostomes.
Article in Developmental dynamics : an official publication of the American Association of Anatomists, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundEGF-CFC proteins are a bilaterian innovation, but they are best known for their roles in Nodal signaling during gastrulation and left-right patterning in vertebrates. Species with multiple family members show evidence of functional specialization. For example, in mouse, Cripto is required for gastrulation, whereas CFC1 is involved in left-right patterning. However, members of the EGF-CFC family across model organisms exhibit limited sequence conservation beyond the EGF-CFC domain, posing challenges for determining their evolutionary history and functional conservation.
resultsIn this study, we describe the evolutionary history of the EGF-CFC family of proteins across several branches of deuterostomes, with a particular focus on vertebrates. We trace the EGF-CFC gene family from a single gene in the deuterostome ancestor through its expansion and functional specialization in tetrapods, and subsequent gene loss and translocation in eutherian mammals. Mouse Cripto and CFC1, zebrafish Tdgf1, and each Xenopus EGF-CFC gene (Tdgf1, Tdgf1.2 and Cripto.3) are all descendants of the ancestral deuterostome Tdgf1 gene.
conclusionsWe propose that subsequent to EGF-CFC family expansion in tetrapods, Tdgf1B (Xenopus Tdgf1.2) acquired specialization in the left-right patterning cascade, and then after its translocation in eutherians to a different chromosomal location, CFC1 has maintained that specialization.
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