Detection of Post-translational Modifications by Fluorescent Staining of Two-Dimensional Gels
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Post-translational modifications (PTMs) are key to the regulation of functional activities of proteins. Quantitative and qualitative
information about PTM stages of proteins is crucial in the discovery of biomarkers of disease. Recent commercial availability
of fluorescent dyes specifically staining PTMs of proteins such as phosphorylation and glycosylation enables the specific
detection of protein regulations taking place with respect to these modifications. Activity and molecular and signalling interactions
of many proteins are determined by their extent of phosphorylation. In our search for biomarkers of neurodegenerative diseases
such as Multiple Sclerosis (MS), using its animal model, Experimental autoimmune encephalomyelitis (EAE), we have applied
the phopshorylation specific fluorescent dye, ProQ Diamond, to study changes taking place in the phosphoproteome. Subsequent
Colloidal Coomassie staining of the same gels detects the changes at the whole proteome level. We have detected many changes
taking place in the CNS tissue of the EAE animals at the whole proteome as well as at the phosphoproteome level that has given
valuable insights into the patho-physiological mechanism of EAE and possibly also MS.
Series: Methods in Molecular Biology | Volume: 446 | Pub. Date: Apr-04-2008 | Page Range: 21-32 | DOI: 10.1007/978-1-60327-084-7_2
Subject: Protein Science
Key Words: Phosphoproteome - ProQ Diamond - 2D gel electrophoresis - fluorescent stain - in-gel digestion - peptide extraction
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