Measurement of mixed disulfides including glutathionylated proteins

Priora, Raffaella, Coppo, Lucia, Salzano, Sonia, Di Simplicio, Paolo and Ghezzi, Pietro (2010) Measurement of mixed disulfides including glutathionylated proteins. In: Cadenas, Enrique and Packer, Lester (eds.) Thiol Redox Transitions in Cell Signaling, Part A: Chemistry and Biochemistry of Low Molecular Weight and Protein Thiols. Methods in Enzymology, 473 . Elsevier, pp. 149-159. ISBN 978-0-12-381345-9

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Mixed disulfides between protein cysteines and low-molecular-weight thiol cysteine or glutathione lead to the formation of cysteinylated proteins or glutathionylated proteins. These types of posttranslational modification are of great importance in the so-called redox regulation, by which changes in the redox state of the cell regulate a number of biochemical processes. We describe the methods for quantitatively measuring the various redox states of cellular thiols including protein cysteines and these mixed disulfides. These include spectrophotometric methods, which do not distinguish between protein-cysteine and protein-glutathione disulfides, and HPLC methods that make such distinction. Finally, we report a method for labeling proteins susceptible to glutathionylation with biotin, to allow their visualization by Western blot after electrophoretic separation, which is used to identify proteins undergoing this posttranslational modification.

Item Type: Book Section
Additional Information: IDS Number: BPK52 ISSN: 0076-6879
Schools and Departments: Brighton and Sussex Medical School > Clinical and Experimental Medicine
Subjects: Q Science > QD Chemistry > QD0241 Organic chemistry > QD0415 Biochemistry
R Medicine > R Medicine (General)
R Medicine > RB Pathology
Depositing User: Pietro Ghezzi
Date Deposited: 22 Aug 2011 15:43
Last Modified: 05 Oct 2017 18:26
Google Scholar:4 Citations
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