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Article
Ligand binding affinity and changes in the lateral diffusion of receptor for advanced glycation endproducts (RAGE)
Biochimica et Biophysica Acta (BBA) - Biomembranes
  • Aleem Syed, Iowa State University
  • Qiaochu Zhu, Iowa State University
  • Emily A. Smith, Iowa State University and Ames Laboratory
Document Type
Article
Publication Version
Accepted Manuscript
Publication Date
12-1-2016
DOI
10.1016/j.bbamem.2016.10.001
Abstract

The effect of ligand on the lateral diffusion of receptor for advanced glycation endproducts (RAGE), a receptor involved in numerous pathological conditions, remains unknown. Single particle tracking experiments that use quantum dots specifically bound to hemagglutinin (HA)-tagged RAGE (HA-RAGE) are reported to elucidate the effect of ligand binding on HA-RAGE diffusion in GM07373 cell membranes. The ligand used in these studies is methylglyoxal modified-bovine serum albumin (MGO-BSA) containing advanced glycation end products modifications. The binding affinity between soluble RAGE and MGO-BSA increases by 1.8 to 9.7-fold as the percent primary amine modification increases from 24 to 74% and with increasing negative charge on the MGO-BSA. Ligand incubation affects the HA-RAGE diffusion coefficient, the radius of confinement, and duration of confinement. There is, however, no correlation between MGO-BSA ligand binding affinity with soluble RAGE and the extent of the changes in HA-RAGE lateral diffusion. The ligand induced changes to HA-RAGE lateral diffusion do not occur when cholesterol is depleted from the cell membrane, indicating the mechanism for ligand-induced changes to HA-RAGE diffusion is cholesterol dependent. The results presented here serve as a first step in unraveling how ligand influences RAGE lateral diffusion.

Comments

This is a manuscript of an article published as Syed, Aleem, Qiaochu Zhu, and Emily A. Smith. "Ligand binding affinity and changes in the lateral diffusion of receptor for advanced glycation endproducts (RAGE)." Biochimica et Biophysica Acta (BBA)-Biomembranes 1858, no. 12 (2016): 3141-3149. DOI: 10.1016/j.bbamem.2016.10.001. Posted with permission.

Creative Commons License
Creative Commons Attribution-NonCommercial-No Derivative Works 4.0 International
Copyright Owner
Elsevier B.V.
Language
en
File Format
application/pdf
Citation Information
Aleem Syed, Qiaochu Zhu and Emily A. Smith. "Ligand binding affinity and changes in the lateral diffusion of receptor for advanced glycation endproducts (RAGE)" Biochimica et Biophysica Acta (BBA) - Biomembranes Vol. 1858 Iss. 12 (2016) p. 3141 - 3149
Available at: http://works.bepress.com/emily-smith/71/