Fructose-1,6-bisphosphate couples glycolytic activity to cell adhesion

Area of Science:

• Cell Biology
• Biochemistry
• Metabolism

Background:

• Cellular adhesion structures called focal adhesions (FAs) are critical for tissue integrity and cell survival.
• The integration of FA dynamics with cellular metabolism is not well understood.
• Aldolase A is a key enzyme in glycolysis, responsible for converting fructose-1,6-bisphosphate (FBP).

Purpose of the Study:

• To identify upstream factors that regulate focal adhesion dynamics and link them to cellular metabolism.
• To elucidate the role of aldolase A in integrating metabolic state with cell adhesion and morphogenesis.

Main Methods:

• Genome-wide screening to identify regulatory factors.
• Biochemical assays to study enzyme activity and metabolite binding.
• Cell imaging and analysis of actin organization, focal adhesion assembly, and cell protrusion.

Main Results:

• Aldolase A was identified as a regulator linking metabolic flux to FA assembly and cell morphogenesis.
• Cellular FBP acts as a signaling metabolite, communicating metabolic status to the actin machinery.
• FBP binds to RCC2, inhibiting it and increasing Rac1 activity, leading to actin reorganization, enhanced FA assembly, and increased cell protrusion.

Conclusions:

• Aldolase A serves as a crucial metabolic switch, connecting glycolysis to cell adhesion and morphogenesis.
• The FBP-RCC2-Rac1 pathway regulates cell adhesion and protrusion, impacting cell behavior.
• This metabolic-signaling mechanism is predicted to be vital in development and diseases like cancer.