The interaction of the bovine cation-independent mannose 6-phosphate receptor with a variety of phosphorylated ligands has been studied using equilibrium dialysis and immobilized receptor to measure ligand binding. The dissociation constants for mannose 6-phosphate, pentamannose phosphate, bovine testes beta-galactosidase, and a high mannose oligosaccharide with two phosphomonoesters were 7 X 10(-6) M, 6 X 10(-6) M, 2 X 10(-8) M, and 2 X 10(-9) M, and the mol of ligand bound/mol of receptor monomer were 2.17, 1.85, 0.9, and 1.0, respectively. We conclude that the cation-independent mannose 6-phosphate receptor has two mannose 6-phosphate-binding sites/polypeptide chain.
Ligand interactions of the cation-independent mannose 6-phosphate receptor. The stoichiometry of mannose 6-phosphate binding.
P. Y. Tong,W. Gregory,S. Kornfeld
Published 1989 in Journal of Biological Chemistry
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- Publication year
1989
- Venue
Journal of Biological Chemistry
- Publication date
1989-05-15
- Fields of study
Medicine, Chemistry
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Semantic Scholar, PubMed
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