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Glucose-induced inactivation of isocitrate lyase (Icl) has been related to protein phosphorylation. Moreover, since rapid reversible inactivation preceded irreversible inactivation of the enzyme, phosphorylation was proposed as the triggering reaction that makes the enzyme accessible to the proteolytic machinery. The protein kinase involved in the process is unknown at the moment. In this work...
In this work we have investigated the role of specific peptide sequences for glucose-inactivation of the yeast isocitrate lyase. Thus, different fragments of the ICL1 coding region were fused to the lacZ gene of E. coli to provide a reporter construction. Determinations of β-galactosidase activities indicated that the decapeptide sequence KTKRNYSARD, located between amino acid residues 37 and 46...
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