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  • Title: MOM19, an import receptor for mitochondrial precursor proteins.
    Author: Söllner T, Griffiths G, Pfaller R, Pfanner N, Neupert W.
    Journal: Cell; 1989 Dec 22; 59(6):1061-70. PubMed ID: 2557158.
    Abstract:
    We have identified a 19 kd protein of the mitochondrial outer membrane (MOM19). Monospecific IgG and Fab fragments directed against MOM19 inhibit import of precursor proteins destined for the various mitochondrial subcompartments, including porin, cytochrome c1, Fe/S protein, F0 ATPase subunit 9, and F1 ATPase subunit beta. Inhibition occurs at the level of high affinity binding of precursors to mitochondria. Consistent with previous functional studies that suggested the existence of distinct import sites for ADP/ATP carrier and cytochrome c, we find that import of those precursors is not inhibited. We conclude that MOM19 is identical to, or closely associated with, a specific mitochondrial import receptor.
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