The effects of bovine myelin basic protein on the phase transition properties of sphingomyelin.
The basic protein of myelin can spontaneously associate with the synthetic phospholipid N-palmitoyl-sphingosinephosphatidylcholine. The protein alters the phase transition properties of the lipid from a single transition at 41.5 degrees C to two overlapping transitions, one being slightly above and the other slightly below the transition temperature of the pure lipid. The effect was not seen upon the addition of poly(L-lysine) to this lipid nor does the myelin basic protein alter the phase transition properties of dimyristoylphosphatidylcholine. The results thus demonstrate that the myelin basic protein can interact with a major zwitterionic lipid component of myelin in addition to acidic phospholipids.
D000818:Animals; D001923:Brain Chemistry; D002417:Cattle; D007700:Kinetics; D008968:Molecular Conformation; D004676:Myelin Basic Protein; D013109:Sphingomyelins; D013696:Temperature
D004676:Myelin Basic Protein; D013109:Sphingomyelins