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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

The fatty acid transport protein (FATP1) is a very long chain acyl-CoA synthetase.

The primary sequence of the murine fatty acid transport protein (FATP1) is very similar to the multigene family of very long chain (C20-C26) acyl-CoA synthetases. To determine if FATP1 is a long chain acyl coenzyme A synthetase, FATP1-Myc/His fusion protein was expressed in COS1 cells, and its enzymatic activity was analyzed. In addition, mutations were generated in two domains conserved in acyl-CoA synthetases: a 6- amino acid substitution into the putative active site (amino acids 249-254) generating mutant M1 and a 59-amino acid deletion into a conserved C-terminal domain (amino acids 464-523) generating mutant M2. Immunolocalization revealed that the FATP1-Myc/His forms were distributed between the COS1 cell plasma membrane and intracellular membranes. COS1 cells expressing wild type FATP1-Myc/His exhibited a 3-fold increase in the ratio of lignoceroyl-CoA synthetase activity (C24:0) to palmitoyl-CoA synthetase activity (C16:0), characteristic of very long chain acyl-CoA synthetases, whereas both mutant M1 and M2 were catalytically inactive. Detergent-solubilized FATP1-Myc/His was partially purified using nickel-based affinity chromatography and demonstrated a 10-fold increase in very long chain acyl-CoA specific activity (C24:0/C16:0). These results indicate that FATP1 is a very long chain acyl-CoA synthetase and suggest that a potential mechanism for facilitating mammalian fatty acid uptake is via esterification coupled influx.[1]


  1. The fatty acid transport protein (FATP1) is a very long chain acyl-CoA synthetase. Coe, N.R., Smith, A.J., Frohnert, B.I., Watkins, P.A., Bernlohr, D.A. J. Biol. Chem. (1999) [Pubmed]
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