Weak interaction of spectrin with phosphatidylcholine‐phosphatidylserine multilayers: A 2H and 31P NMR study

FEBS Letters

Watts, Anthony²  Bitbol, Michel¹  Devaux, Phillippe F.²  Dempsey, Christopher² 

[1] Institut de Biologie Physico-Chimique, 13, rue Pierre et Marie Curie, 75005 Paris, France;Department of Biochemistry, University of Oxford, Oxford OX1 3QU, England

关键词: Spectrin;    Phosphatidylserine;    Phosphatidylcholine;    NMR;    2H−;    NMR;    31P-;   

DOI  :  10.1016/0014-5793(89)81196-2

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

Spectrin from human erythrocytes binds to bilayer dispersions of both DMPC and DMPS:DMPC (1:1, w/w). However, no effect of bound spectrin on the conformation of the lipid head groups, as measured from the deuterium quadrupolar splittings of DMPC or DMPS specifically deuterated in the polar head groups, was detected in 1:1 mixtures of the two lipids containing either deuterated DMPC or DMPS. Neither the phase transition of the DMPS:DMPC mixtures, nor the spin-lattice relaxation time (T ₁) of the deuterated DMPS head group, was affected by spectrin. These results argue against any strong interaction of spectrin with phosphatidylserine and rule out the possibility that spectrin is responsible for the maintainance of PS in the inner monolayer of the erythrocyte membrane during the whole life-span of this cell.

【 授权许可】

Unknown