A new method for reversible immobilization of thiol biomolecules based on solid phase-bound thiolsulfonate groups

Dublin Core

Title

A new method for reversible immobilization of thiol biomolecules based on solid phase-bound thiolsulfonate groups

Subject

INMOVILIZACION DE PROTEINAS
INMOVILIZACION REVERSIBLE
BIBLIOGRAFIA NACIONAL QUIMICA
AGAROSA
1991

Abstract

A new method for the reversible immobilization of thiol bimolecules |b e.g.,thiolpeptides and thiolproteins |b to beaded agarose and other solid phases is reported. The method consists of an activation and a coupling step. The activation is based on oxidation of disulfides (or thiol groups via disulfides) present in a solid phase by hydrogen peroxide at moderately acidic pH. This oxidation leads to disulfide oxides (thiolsulfinate groups of which the majority are further oxidized to thiolsulfonate). The thiolsulfonate groups react easily with thiol compounds |b which become immobilized via disulfide bonds. The pH range for thiol coupling is wide (pH 5-8) |b but for most thiols the reaction seems to proceed faster at pH>7. The stability of the reactive group to hydrolysis |b especially at neutral and weakly acidic pH |b is very high. The activated gel |b therefore |b can be stored as a suspension at pH 5 for extended periods. The method has been used to reversibly immobilize glutathione |b Beta-galactosidase |b alcohol dehydrogenase |b urease |b and papain |b all with exposed thiol groups as well as thiolated bovine serum albumin and sweet-potato Beta-amylase. Depending on the thiol content of starting thiol-agarose |b thiol-sulfonate-agarose derivatives with different binding capacities can be obtained. Thus |b up to 5.0 mg (16 umol) glutathione and 15 mg thiol-protein/mL gel derivative have been immobilized. The gel bead can be regenerated and reused at least twice. Besides agarose |b cellulose |b crosslinked dextran |b and polyacrylamide were shown to be very suitable as supports for solid-phase thiolsulfonates.

Creator

Barbieri, M.
Carlsson, Jan

Source

Applied Biochemistry and Biotechnology v. 31, no. 2, 1991. -- p. 175-195

Publisher

Springer

Date

1991

Rights

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Format

PDF

Language

Inglés

Type

Artículo

Identifier

DOI: 10.1007/BF02921788
Date Added
April 26, 2016
Collection
Bibliografía Nacional Química
Item Type
Document
Tags
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Citation
Batista-Viera, Francisco et al., “A new method for reversible immobilization of thiol biomolecules based on solid phase-bound thiolsulfonate groups,” RIQUIM - Repositorio Institucional de la Facultad de Química - UdelaR, accessed November 17, 2025, https://riquim.fq.edu.uy/items/show/3903.