[1] ATP System Project, Exploratory Res. Adv. Tech. (ERATO), Japan Sci. and Technol. Agency (JST), 5800-3 Nagatsuta-cho, Midori-ku, Yokohama 226-0026, Japan
[2] Chemical Resources Laboratory, Tokyo Institute of Technology, Nagatsuta 4259, Midori-ku, Yokohama 226-8503, Japan
[3] Laboratory of Cell Dynamics, Grad. Sch. of Bioagricultural Sci., Nagoya University, Nagoya 464-8601, Japan
[4] Department of Structural Biology, Free University of Amsterdam, De Boelelaan 1087, 1081 Amsterdam, Netherlands