Table S1.

Parameters used for the LD simulation

Parameter type	Unit	Parameter value
Actin positions
xA,i, i = 20	Nanometers	0,36,72,…
Actin-binding potential
Aa	Kilocalories per mole	−4.0
Wa		1,000
ATP-binding potential
AATP	Kilocalories per mole	2.0
WATP		1,000
Phosphate release potential
Ap	Kilocalories per mole	−12.0
Wp		10,000
Powerstroke (forward)
$A_{PS}^f$	Kilocalories per mole	1.5
$W_{PS}^f$		10,000
xf	Nanometers	14
Powerstroke (backward)
$A_{PS}^b$	Kilocalories per mole	4.5, 5.5, 6.5, 7.5
$W_{PS}^b$		10,000
Xb,n, n = 3	Nanometers	15, 30, 45
Bond
xbond	Nanometers	3.0
Kbond	Kilocalories per mole per (Å)2	3.0
Angle
θangle	Degrees	171.8
Kangle	Kilocalories per mole per (rad)2	30.0
Joint angle
θjoint	Degrees	91.6
Kjoint	Kilocalories per mole per (rad)2	1.5
Nonbonded steric interaction
anb	Kilocalories per mole	200.0
bnb		0.05
rnb	Nanometers	5.0
Effective LD friction		1,000
Effective LD mass		100
LD temperature	Kelvin	300
Time step	Picoseconds	2