alexa The Leishmania kinetoplast-mitochondrion contains terminal uridylyltransferase and RNA ligase activities.


Biochemistry & Physiology: Open Access

Author(s): Bakalara N, Simpson AM, Simpson L

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Abstract Purified mitochondria of Leishmania tarentolae contain 3'-terminal uridylyltransferase and RNA ligase activities which can be solubilized by detergent lysis of the organelle. Run-off transcription of maxicircle and minicircle DNA also occurs in intact and Triton-lysed mitochondria, using [32P]GTP as the labeled precursor. Heparin inhibits the solubilized terminal uridylyltransferase activity but does not affect the labeling of endogenous RNAs in intact mitochondria with [32P]UTP. Clarification of the mitochondrial Triton lysate causes an increase in terminal uridylyltransferase activity with exogenous substrates. These two activities are candidates for involvement in a post-transcriptional RNA editing process of mitochondrial transcripts.
This article was published in J Biol Chem and referenced in Biochemistry & Physiology: Open Access

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