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Iron-dependent binding of bovine milk α-casein with holo-lactoferrin, but not holo-transferrin. | LitMetric

Iron-dependent binding of bovine milk α-casein with holo-lactoferrin, but not holo-transferrin.

Biometals

Laboratory of Veterinary Biochemistry, School of Veterinary Medicine, Kitasato University, Towada, Aomori, 034-8628, Japan.

Published: October 2012

AI Article Synopsis

Article Abstract

Bovine milk α-casein has been identified as an iron- and heme-binding protein. However, the physiological role of its iron-binding remains to be elucidated in more detail. α-Casein was immobilized on CNBr-activated Sepharose 4B beads, and the α-casein agarose beads efficiently bound hemin as well as ferrous ammonium sulfate (Fe(2+)) as compared with control beads. Additionally, α-casein-beads bound bovine holo-lactoferrin (Lf), but not holo-transferrin. Lf caused the release of Fe(2+) which had bound to the α-casein-agarose beads beforehand. These results suggest that bovine α-casein iron-dependently binds holo-bovine Lf more strongly than Fe(2+), and that strong binding between them may play a physiological role in regulating iron homeostasis in the bovine mammary gland.

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Source
http://dx.doi.org/10.1007/s10534-012-9573-3DOI Listing

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