Kinesins consume ATP to power the motor which allows them to move along microtubules. The motor region contains highly conserved Switch 1 (SSRSH) and 2 (DLAGSE) motifs which change conformation during ATP hydrolysis (Rice et al. 1999). These form a salt-bridge that, in myosin, closes the nucleotide-binding cleft, enabling the motor to hydrolyze ATP (Geeves & Holmes 1999). This closed conformation has now been seen by cryo-electron microscopy in human conventional kinesin (Sindelar & Downing 2010) and in a crystal structure of the frog kinesin-5 Eg5 (Parke et al. 2010).
Vale, RD, Funatsu, T, Pierce, DW, Romberg, L, Harada, Y, Yanagida, T
Yang, JT, Saxton, WM, Stewart, RJ, Raff, EC, Goldstein, LS
Sindelar, CV, Budny, MJ, Rice, S, Naber, N, Fletterick, R, Cooke, R
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