Lateral Diffusion of Specific Antibodies Bound to Lipid Monolayers on Alkylated Substrates
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We have measured the lateral mobility of fluoresceinated monoclonal IgG antibodies bound specifically to a spin label lipid hapten in phospholipid monolayers supported on alkylated silicon oxide surfaces. Dimyristoyl phosphatidylcholine and dipalmitoyl phosphatidylcholine monolayers containing 5 mol% of the lipid hapten were transferred by conventional Langmuir-Blodgett techniques onto substrates alkylated with hydrocarbon chains containing 10, 16, and 18 carbon atoms. We show that the diffusion of the bound antibodies depends on their lateral density, the composition of the lipid monolayer, and the nature of lipid coupling to hydrocarbon chains on the alkylated substrate. Antibody diffusion coefficients at low antibody densities are within a factor of 2 of those displayed by the lipid hapten in the absence of the bound antibody. High antibody densities result in reduced antibody mobility, but the lateral diffusion of unbound lipids is unaffected.
Supported Lipid Bilayer Technology for the Study of Cellular Interfaces.
Crites T, Maddox M, Padhan K, Muller J, Eigsti C, Varma R Curr Protoc Cell Biol. 2015; 68:24.5.1-24.5.31.
PMID: 26331983 PMC: 4605915. DOI: 10.1002/0471143030.cb2405s68.
Vie V, Van Mau N, Chaloin L, Lesniewska E, Le Grimellec C, Heitz F Biophys J. 2000; 78(2):846-56.
PMID: 10653797 PMC: 1300687. DOI: 10.1016/S0006-3495(00)76642-2.
Wright L, Palmer 3rd A, Thompson N Biophys J. 1988; 54(3):463-70.
PMID: 3207834 PMC: 1330345. DOI: 10.1016/S0006-3495(88)82979-5.
Bierer B, Herrmann S, Brown C, Burakoff S, Golan D J Cell Biol. 1987; 105(3):1147-52.
PMID: 3115995 PMC: 2114826. DOI: 10.1083/jcb.105.3.1147.
Self diffusion of interacting membrane proteins.
Abney J, Scalettar B, Owicki J Biophys J. 1989; 55(5):817-33.
PMID: 2720077 PMC: 1330520. DOI: 10.1016/S0006-3495(89)82882-6.