Abstract
The milk protein β-lactoglobulin has been extensively studied but its function has not been identified. A clue regarding the function of a protein can be obtained by discovering a genetic relationship with a protein of known function through comparisons of amino acid sequence. Such comparisons revealed that β-lactoglobulin is similar to human serum retinol-binding protein and to another human protein of unknown function known as complex-forming glycoprotein heterogeneous in charge (protein HC). β-Lactoglobulins from several species have been found to bind retinol, while the absorption and fluorescence properties reported for the unidentified heterogeneous prosthetic group of protein HC are retinoid-like. The role of serum retinol-binding protein in vitamin A transport in the circulation suggests that the other two homologous proteins may function in the binding and transport of retinoids; β-lactoglobulin may facilitate the absorption of vitamin A from milk and protein HC may mediate the excretion of retinol-derived metabolites.
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Dates
Type | When |
---|---|
Created | 18 years, 10 months ago (Oct. 5, 2006, 3:42 p.m.) |
Deposited | 1 year, 7 months ago (Jan. 12, 2024, 6:16 p.m.) |
Indexed | 2 months, 3 weeks ago (June 3, 2025, 12:26 a.m.) |
Issued | 40 years, 4 months ago (April 19, 1985) |
Published | 40 years, 4 months ago (April 19, 1985) |
Published Print | 40 years, 4 months ago (April 19, 1985) |
@article{Pervaiz_1985, title={Homology of β-Lactoglobulin, Serum Retinol-Binding Protein, and Protein HC}, volume={228}, ISSN={1095-9203}, url={http://dx.doi.org/10.1126/science.2580349}, DOI={10.1126/science.2580349}, number={4697}, journal={Science}, publisher={American Association for the Advancement of Science (AAAS)}, author={Pervaiz, Syed and Brew, Keith}, year={1985}, month=apr, pages={335–337} }