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Updated: Jun 13, 2025

An Integrated Approach for Microprotein Identification and Sequence Analysis
Published on: July 12, 2022
Decrypting the phylogenetics history of EGF-CFC proteins Cripto and Cryptic
Natalia A Shylo1, Paul A Trainor1,2
1Stowers Institute for Medical Research, Kansas City, MO, USA.
Epidermal growth factor-Cripto, F-G-F-2, Chi-3-like (EGF-CFC) proteins are crucial for embryonic development. This study traces the evolutionary history of EGF-CFC genes, revealing their specialization and conservation across species.
Area of Science:
- Developmental Biology
- Evolutionary Biology
- Genetics
Background:
- Epidermal growth factor-Cripto, F-G-F-2, Chi-3-like (EGF-CFC) proteins function as essential coreceptors for Nodal signaling.
- Nodal signaling is vital for embryonic gastrulation and left-right patterning.
- Functional specialization of EGF-CFC family members is observed across species, yet sequence conservation is limited.
Purpose of the Study:
- To elucidate the evolutionary history of the EGF-CFC gene family.
- To understand the functional specialization and conservation of EGF-CFC proteins across vertebrates.
Main Methods:
- Phylogenetic analysis of EGF-CFC genes across diverse species.
- Comparative genomics to trace gene duplication, loss, and translocation events.
Main Results:
- The EGF-CFC gene family originated from a single gene in the deuterostome ancestor.
- Gene expansion and functional specialization occurred in tetrapods.
- Subsequent gene loss and chromosomal translocation events were identified in eutherian mammals.
- Specific genes like Xenopus Tdgf1.2 and mammalian Cfc1/Cryptic show specialized roles in left-right patterning.
Conclusions:
- The evolutionary trajectory of EGF-CFC genes demonstrates a pattern of expansion, specialization, and subsequent modification.
- Despite limited sequence conservation, key functional roles in embryonic development are maintained through evolutionary divergence.
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