Glycolytic intermediates induce amorphous calcium carbonate formation in crustaceans

Area of Science:

• Biomineralization research
• Biochemistry
• Crustacean biology

Background:

• Amorphous calcium carbonate (ACC) biominerals are crucial for crustaceans, particularly in their exoskeleton and gastroliths, facilitating calcium carbonate storage during molting.
• The potential role of phosphorus in ACC formation has been hypothesized but never concretely identified in biominerals.

Purpose of the Study:

• To identify specific phosphorus-containing compounds within crustacean ACC biominerals.
• To determine the function of these identified phosphorus compounds in ACC stabilization.

Main Methods:

• Analysis of crustacean exoskeleton and gastrolith samples.
• Identification of phosphorus-containing organic molecules using biochemical techniques.

Main Results:

• Phosphoenolpyruvate and 3-phosphoglycerate, key intermediates of the glycolytic pathway, were identified in crustacean biominerals.
• These identified compounds were found to play a significant role in stabilizing the amorphous calcium carbonate structure.

Conclusions:

• The study identifies specific phosphorus-containing compounds in crustacean biominerals for the first time.
• Phosphoenolpyruvate and 3-phosphoglycerate are crucial for stabilizing amorphous calcium carbonate, providing new insights into biomineralization processes.