FABP5 (human, recombinant)

Fatty acid binding protein 5 (FABP5) is one of nine known cytosolic FABPs ranging in size from 14-15 kDa containing 127-132 amino acids.¹ Members of this protein family exhibit high affinity for lipophilic ligands and were named according to the tissue from which they were initially isolated.¹ FABP5 is found in skin, brain, lens, capillary epithelium, and retina. Studies suggest that FABPs are involved in the uptake and metabolism of fatty acids, in the maintenance of cellular fatty acid levels, in intracellular trafficking of these substrates, in the modulation of specific enzymes of lipid metabolic pathways, and in the modulation of cell growth and differentiation.² FABP family members have highly conserved three dimensional structures and 22-73% amino acid sequence similarity. The presence of one or more disulphide bridges is a unique feature of FABP5 that may be physiologically relevant.² Elevated levels of FABP5 have been observed in prostate and bladder carcinoma.¹

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1. Zimmerman, A.W., and Veerkamp, J.H. New insights into the structure and function of fatty acid-binding proteins. Cell. Mol. Life Sci. 59(7), 1096-1116 (2002).

2. Massolini, G., and Calleri, E. Survey of binding properties of fatty acid-binding proteins chromatographic methods. J. Chromatogr. B Analyt. Technol. Biomed. Life Sci. 797(1-2), 255-268 (2003).