Evolutionary Viewpoint on GnRH (gonadotropin-releasing hormone) in Chordata - Amino Acid and Nucleic Acid Sequences

Balsaeng'gwa saengsig
Donchan Choi

Abstract

GnRH (gonadotropin-releasing hormone) is a supreme hormone regulating reproductive activity in most animals. The sequences of amino acid and nucleic acid of GnRH reported up to now are examined from the evolutionary framework of Chordata. All identified GnRH are classified into GnRH1, GnRH2, or GnRH3. In all three forms of GnRH both N-terminal and C-terminal are conserved, which allows for effective binding to their receptors. The three amino acids in the middle of GnRH1 sequence have altered diversely from the primitive Chordata, which is indicative of the adaptation process to the ambient environment. GnRH2 and GnRH3 sequences are well conserved. There are more diverse modifications in the nucleic acids than in amino acid sequence of GnRH1. These variations can result from meiosis, mutation, or epigenetics and indicate that GnRH is the product of natural selection.

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Citations

Feb 8, 2020·General and Comparative Endocrinology·José A Muñoz-CuetoYonathan Zohar
Jul 3, 2020·General and Comparative Endocrinology·Yonathan Zohar

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