The primary structure of a basic (pI-9.0) fatty-acid-binding protein from liver of Gallus domesticus

The complete amino acid sequence of a basic (pI 9.0) fatty acid-binding protein purified from liver of Gallus domesticus was determined by automated Edman degradation of tryptic, CNBr/HFBA and Staphylococcus aureus protease peptides. The protein contains 125 amino acid residues which correspond to a molecular mass of 14094. The identification of the blocked N-terminus Ac-Ala required digestion of a SV-8 peptide with the acylamino acid-releasing enzyme prior to sequence analysis. Sequence comparison shows that chicken liver basic-FABP has a significant similarity to other proteins belonging to the superfamily of intracellular lipid molecule binding proteins. Moreover, these sequence data confirm that basic-FABP probably binds its substrate in a slightly different way when compared with other FABPs. Basic-FABP was submitted to the EMBL Data Library with an accession number of P80226.