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Title:Characterization of Membrane Organization and Dynamics in Giant Unilamellar Vesicles Assembled From Rat Kidney Membrane Extracts and Fragments
Author(s):Cheng, Melanie Anne B.
Doctoral Committee Chair(s):William W. Mantulin
Department / Program:Biochemistry
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):Biology, Cell
Abstract:Fluctuation correlation spectroscopy (FCS) measurements performed on the intact BBM reveal that the protein-lipid dynamics in renal BBM is complex with a large range of diffusing species. In particular, the dynamics of NaPi-IIa was related to the perturbations in the BBM as a result of dietary potassium deficiency. By calculating the diffusion coefficient of NaPi-IIa and using photon counting histogram (PCH) analysis to measure protein aggregation, we determined that the lateral diffusion of NaPi-IIa is slowed down and its aggregation is increased in potassium deficiency, both of which are associated with the decreased Na/Pi cotransport activity. This model was proposed as a means for posttranslational regulation of Na/Pi cotransport activity that is mediated by the increased sphingomyelin and glycosphingolipid content in potassium-deficient BBM, although the mechanisms by which these lipids may modulate NaPi-IIa activity have yet to be determined.
Issue Date:2005
Description:126 p.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2005.
Other Identifier(s):(MiAaPQ)AAI3198946
Date Available in IDEALS:2015-09-25
Date Deposited:2005

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