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  • Title: Regulation of cholinephosphotransferase by thyroid hormone.
    Author: Chatterjee D, Mukherjee S, Das SK.
    Journal: Biochem Biophys Res Commun; 2001 Apr 13; 282(4):861-4. PubMed ID: 11352629.
    Abstract:
    We have demonstrated earlier that thyroid hormone (T3) regulates the activity of cholinephosphotransferase (CPT) in guinea pig lung. This effect of T3 is not organ specific because we found T3 also regulates CPT activity in the guinea pig liver. Northern blot analysis using two oligonucleotide probes, one synthesized on the basis of the yeast CPT gene sequence and another on the basis of partial cDNA clone from guinea pig CPT clone, revealed that T3 stimulates the expression of new CPT mRNA. Studies with transcriptional and translational inhibitors indicated that T3 enhanced the translation of the CPT mRNA as well as translocation of preformed CPT enzyme protein from cytosol to mitochondria. Furthermore, it strengthens our previous finding that yeast CPT and guinea pig CPT have high homology in their sequence as both the oligonucleotide probes gave the similar type of Northern blot in the present study.
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