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  • Title: In vitro transport of ornithine carbamoyltransferase precursor into rat liver mitochondria using a more homologous medium.
    Author: Miralles VJ, González-Bosch C, Marcote MJ, Hernández-Yago J, Grisolía S.
    Journal: Arch Biochem Biophys; 1989 Nov 15; 275(1):224-7. PubMed ID: 2817897.
    Abstract:
    The precursor of ornithine carbamoyltransferase can be transported in vitro into rat liver mitochondria using the postmitochondrial supernatant from rat liver, a more homologous medium than the commonly used rabbit reticulocyte lysate. The transport of the precursor in the case of reticulocyte lysate requires a standard translation mixture. In the presence of the postmitochondrial supernatant the same is true. However, when the components of the translation mixture were added individually to the postmitochondrial supernatant, it was found that spermidine or spermine, at physiological concentrations, sufficed for the transport of the precursor of ornithine carbamoyltransferase. The activity of the postmitochondrial supernatant was inactivated by trypsin and slightly decreased by RNase treatment; it was not lost by dialysis or by heating at 100 degrees C.
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