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  • Title: Two subunits of the F0F1-ATPase are phosphorylated in the inner mitochondrial membrane.
    Author: Struglics A, Fredlund KM, Møller IM, Allen JF.
    Journal: Biochem Biophys Res Commun; 1998 Feb 24; 243(3):664-8. PubMed ID: 9500982.
    Abstract:
    Inside-out submitochondrial particles from potato tuber mitochondria were incubated with [gamma-32P]ATP. More than 16 phosphorylated polypeptides were detected by autoradiography on an SDS-gel. Two phosphoproteins, migrating at 22 and 28 kDa, were excised from the SDS-gel, electroeluted, and purified further by anion chromatography. The phosphoproteins were N-terminally sequenced. Over the regions sequenced, the 22 and 28 kDa phosphoproteins had 100% sequence identity with potato proteins identified as the delta'-subunit of the F1-ATPase and the b-subunit of the F0-ATPase, respectively. We suggest that phosphorylation of these proteins may control the interaction between F1 and F0 and regulate energy coupling in oxidative phosphorylation.
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