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  • Title: Tim9, a new component of the TIM22.54 translocase in mitochondria.
    Author: Adam A, Endres M, Sirrenberg C, Lottspeich F, Neupert W, Brunner M.
    Journal: EMBO J; 1999 Jan 15; 18(2):313-9. PubMed ID: 9889188.
    Abstract:
    We have identified Tim9, a new component of the TIM22.54 import machinery, which mediates transport of proteins into the inner membrane of mitochondria. Tim9, an essential protein of Saccharomyces cerevisiae, shares sequence similarity with Tim10 and Tim12. Tim9 is located in the mitochondrial intermembrane space and is organized into two distinct hetero-oligomeric assemblies with Tim10 and Tim12. One complex contains Tim9 and Tim10. The other complex contains Tim9, Tim10 and Tim12 and is tightly associated with Tim22 in the inner membrane. The TIM9.10 complex is more abundant than the TIM9.10.12 complex and mediates partial translocation of mitochondrial carriers proteins across the outer membrane. The TIM9.10.12 complex assists further translocation into the inner membrane in association with TIM22.54.
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