Analysis of protein-heparin interactions using a portable SPR instrument



Su, Dunhao, Li, Yong, Yates, Edwin A, Skidmore, Mark A, Lima, Marcelo A and Fernig, David G
(2022) Analysis of protein-heparin interactions using a portable SPR instrument. PeerJ Analytical Chemistry, 4. e15 - e15.

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Abstract

<jats:p>Optical biosensors such as those based on surface plasmon resonance (SPR) are a key analytical tool for understanding biomolecular interactions and function as well as the quantitative analysis of analytes in a wide variety of settings. The advent of portable SPR instruments enables analyses in the field. A critical step in method development is the passivation and functionalisation of the sensor surface. We describe the assembly of a surface of thiolated oleyl ethylene glycol/biotin oleyl ethylene glycol and its functionalisation with streptavidin and reducing end biotinylated heparin for a portable SPR instrument. Such surfaces can be batch prepared and stored. Two examples of the analysis of heparin-binding proteins are presented. The binding of fibroblast growth factor 2 and competition for the binding of a heparan sulfate sulfotransferase by a library of selectively modified heparins and suramin, which identify the selectivity of the enzyme for sulfated structures in the polysaccharide and demonstrate suramin as a competitor for the enzyme’s sugar acceptor site. Heparin functionalised surfaces should have a wide applicability, since this polysaccharide is a close structural analogue of the host cell surface polysaccharide, heparan sulfate, a receptor for many endogenous proteins and viruses.</jats:p>

Item Type: Article
Divisions: Faculty of Health and Life Sciences
Faculty of Health and Life Sciences > Institute of Systems, Molecular and Integrative Biology
Depositing User: Symplectic Admin
Date Deposited: 18 May 2022 09:09
Last Modified: 20 May 2022 00:11
DOI: 10.7717/peerj-achem.15
Open Access URL: https://peerj.com/articles/achem-15/#
URI: https://livrepository.liverpool.ac.uk/id/eprint/3155023