Distance distribution function of sodium dodecyl sulfate micelles by x-ray scattering

1991 ◽  
Vol 95 (1) ◽  
pp. 423-427 ◽  
Author(s):  
R. Itri ◽  
L. Q. Amaral
2002 ◽  
Vol 248 (1) ◽  
pp. 149-157 ◽  
Author(s):  
Wilker Caetano ◽  
Emerson Luiz Gelamo ◽  
Marcel Tabak ◽  
Rosangela Itri

1997 ◽  
Vol 56 (1) ◽  
pp. 608-613 ◽  
Author(s):  
Ning Lei ◽  
C. R. Safinya ◽  
D. Roux ◽  
K. S. Liang

Langmuir ◽  
1994 ◽  
Vol 10 (6) ◽  
pp. 1690-1694 ◽  
Author(s):  
Susumu Shinagawa ◽  
Mamoru Sato ◽  
Keiichi Kameyama ◽  
Toshio Takagi

2018 ◽  
Vol 51 (1) ◽  
pp. 157-166 ◽  
Author(s):  
Vito Graziano ◽  
Lisa Miller ◽  
Lin Yang

The structural information contained in solution scattering data from empty lipid nanodiscs is examined in the context of a multi-component geometric model. X-ray scattering data were collected on nanodiscs of different compositions at scattering vector magnitudes up to 2.0 Å−1. Through the calculation of the partial form factor for each of the nanodisc components before the isotropic average, structural parameters in the model were correlated to the features observed in the X-ray scattering data and to the corresponding distance distribution function. It is shown that, in general, the features at ∼0.3–0.6 Å−1in the scattering data correlate to the bilayer structure. The data also support the argument that the elliptical shape of nanodiscs found in model fitting is physical, rather than an artefact due to the nanodisc size distribution. The lipid chain packing peak at ∼1.5 Å−1is visible in the data and reflects the lipid bilayer phase transition. The shape change in the distance distribution function across the phase transition suggests that the nanodiscs are more circular in the fluid phase. The implication of these findings for model fitting of empty and protein-loaded nanodiscs is discussed.


2013 ◽  
Vol 111 ◽  
pp. 561-570 ◽  
Author(s):  
José Wilson P. Carvalho ◽  
Fernanda Rosa Alves ◽  
Tatiana Batista ◽  
Francisco Adriano O. Carvalho ◽  
Patrícia S. Santiago ◽  
...  

2002 ◽  
Vol 16 (3-4) ◽  
pp. 343-350 ◽  
Author(s):  
O. López ◽  
M. Cócera ◽  
R. Pons ◽  
H. Amenitsch ◽  
J. Caelles ◽  
...  

The technique of time resolved small angle X–ray scattering (SAXS) using a synchrotron radiation source was used to study the structural transformations as well as the kinetic associated with the first steps of the solubilization of liposomes induced by the anionic surfactant sodium dodecyl sulfate (SDS). Neutral and electrically charged (anionic and cationic) liposomes were used to investigate the effect of the electrostatic charges on these initial steps. The mechanism that induces the solubilization process consisted in an adsorption of surfactant on the bilayers and a desorption of mixed micelles from the liposomes surface to the aqueous medium. Regardless of the type of charge of the liposome the time needed for the desorption of the first mixed micelles was shorter than that for the complete adsorption of the surfactant on the liposomes surface. The present work demonstrates that the adsorption of the SDS molecules on liposomes was slower when the charges of surfactant and lipids were the same. As for the release of mixed micelles from the surface of these liposomes, this process was slower when the charges of surfactant and lipids were opposite.


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