Spatial relationship between SH1 and the actin binding site on myosin subfragment-1 surface.

Abstract

To examine the spatial relationship between SH1 thiol and actin binding site on subfragment-1 surface, we studied the interaction with actin of subfragment-1 whose SH1 was labeled with an iodoacetate derivative of biotin and covered with avidin. Subfragment-1--avidin complex bound F-actin and its Mg2+ ATPase activity was activated by actin. Considering the… (More)

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