Biochemical Characterization of Apoptotic Cleavage of KH-Type Splicing Regulatory Protein (KSRP) / Far Upstream Element-Binding Protein 2 (FBP2)

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Caspases, Asp-specific cysteine protease, cleave proteins upon apoptosis. To identify and characterize new caspase substrate in the nucleus, the proteome of the rat liver extracts was analyzed after the treatment with caspases. One of the identified proteins was KSRP / FBP2 that is preferentially cleaved by caspase-3 and -7 at two sites after Asp102 and Asp183. The second site was cleaved only in the protein produced in cells, but not in in vitro translated protein. These results indicate that more than the primary sequence may be important for the recognition by caspases.

Keywords: caspases; ksrp; proteome; substrate specificity

Document Type: Review Article


Publication date: December 1, 2002

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  • Protein & Peptide Letters publishes short papers in all important aspects of protein and peptide research, including structural studies, recombinant expression, function, synthesis, enzymology, immunology, molecular modeling, drug design etc. Manuscripts must have a significant element of novelty, timeliness and urgency that merit rapid publication. Reports of crystallisation, and preliminary structure determinations of biologically important proteins are acceptable. Purely theoretical papers are also acceptable provided they provide new insight into the principles of protein/peptide structure and function.
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