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  • Title: Binding of the N-terminal 63 kDa portion of connectin/titin to alpha-actinin as revealed by the yeast two-hybrid system.
    Author: Ohtsuka H, Yajima H, Maruyama K, Kimura S.
    Journal: FEBS Lett; 1997 Jan 13; 401(1):65-7. PubMed ID: 9003807.
    Abstract:
    Connectin/titin is a 3000 kDa protein which links the myosin filament to the Z-line in vertebrate striated muscle sarcomeres. To search for the Z-line proteins to which connectin binds, the yeast two-hybrid system was applied using cDNA coding the N-terminal 63 kDa fragment of connectin. Two clones coding the C-terminal half region of alpha-actinin (amino acids, 343-897 and 446-897) were obtained. Enzyme-linked immunosorbent assay clearly demonstrated the interactions of alpha-actinin and the N-terminal 63 kDa fragment of connectin in vitro. Thus it is concluded that the N-terminal 63 kDa portion of connectin binds to alpha-actinin in the Z-line of myofibrillar sarcomeres.
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