📋 Tender Overview
In a nutshell * pH value controls movement: In sea urchin and salmon sperm, the pH value regulates whether they remain immotile or swim. * An enzyme as a pH sensor: A rising pH activates soluble adenylyl cyclase (sAC) in sea urchins and fish. This produces the messenger substance cAMP, which is essential for sperm movement. * Universal mechanism: The regulation of cAMP concentration via the pH sensor sAC could be widespread among marine invertebrates and fish. * Impact on reproduction: As lakes and oceans become more acidic due to climate change and increased carbon dioxide levels, this could negatively impact reproduction of many marine organisms. What makes sea urchin and salmon sperm swim In a nutshell * pH value controls movement: In sea urchin and salmon sperm, the pH value regulates whether they remain immotile or swim. * An enzyme as a pH sensor: A rising pH activates soluble adenylyl cyclase (sAC) in sea urchins and fish. This produces the messenger substance cAMP, which is essential for sperm movement. * Universal mechanism: The regulation of cAMP concentration via the pH sensor sAC could be widespread among marine invertebrates and fish. * Impact on reproduction: As lakes and oceans become more acidic due to climate change and increased carbon dioxide levels, this could negatively impact reproduction of many marine organisms.
