Functions of fatty acid binding proteins

Area of Science:

• Biochemistry
• Molecular Biology
• Cell Biology

Background:

• Cytosolic fatty acid binding proteins (FABP) are a family of 14-15 kDa proteins.
• Eight members of this gene family have been identified, exhibiting tissue-specific expression patterns.

Purpose of the Study:

• To investigate the functions of cytosolic FABP in intracellular transport and metabolism of long-chain fatty acids.
• To explore the potential role of FABP in cell growth and proliferation.
• To examine the characteristics of plasma membrane FABP (FABPpm) in fatty acid transport.

Main Methods:

• Review of existing literature on FABP gene family, tissue expression, ligand binding, and regulation.
• Analysis of in vitro studies on enzyme activity and lipid membrane interactions.
• Examination of evidence for FABPpm function in fatty acid transport across the plasma membrane.

Main Results:

• Cytosolic FABP enhance long-chain fatty acid transfer between lipid membranes and stimulate fatty acid metabolism enzymes in vitro.
• Evidence suggests structure- and tissue-specific functional specialization among FABP members.
• FABP may modulate cell growth and proliferation due to their affinity for ligands like prostaglandins and fatty acids.
• Plasma membrane FABP (FABPpm) are implicated in long-chain fatty acid transport across the plasma membrane.

Conclusions:

• Cytosolic FABP play a broad role in intracellular long-chain fatty acid transport and metabolism.
• FABP exhibit functional specialization, influencing cell growth and proliferation.
• FABPpm are involved in transmembrane fatty acid transport, though further characterization is needed.