Precursor structure of egg proteins in the coral Galaxea fascicularis

Biochemical and Biophysical Research Communications
Hideki HayakawaToshiki Watanabe

Abstract

In the egg of the reef coral Galaxea fascicularis, four proteins (named GfEP-1 to -4) are stored in high abundance. In the present study, a cDNA containing a full-length open reading frame for GfEP-1 was cloned, and the translated protein sequence was compared to the N-terminal sequences of GfEP-2, -3, and -4. GfEP-1 and -2 were shown to be generated by processing of a precursor of 1439 amino acids, and GfEP-3 turned out to be a partial fragment of GfEP-2. The precursor protein contained regions which exhibited similarities to vitellogenins (Vgs) in bilaterian animals (oviparous vertebrates and invertebrates including nematodes, arthropods, and molluscs). This study reports the first cloning and characterization of a full-length cDNA encoding a Vg in a non-bilaterian animal, and argues that the emergence of Vg as a precursor of egg yolk proteins predated the divergence of the cnidarian and bilaterian lineages.

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Citations

Dec 4, 2008·Progress in Lipid Research·Patrick J Babin, Geoffrey F Gibbons
Feb 9, 2008·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Toshie MatsumotoAkihiko Hara
Sep 29, 2012·Evolution & Development·Thomas A A Prowse, Maria Byrne
Jan 25, 2021·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Ee Suan TanAkihiro Takemura

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