Table 1.

Functional roles of conserved catalytic motifs among motor ATPase families. Abbreviations: W-A = Walker A, W-B = Walker B, RF = arginine finger, CE = catalytic glutamate, H = H loop, D = D loop, Q = Q loop, C = C region or ABC signature motif, SI = sensor I, SII = sensor II. All other motifs are listed as roman numerals.

	P-loop	Metal binding	γ-phosphate sensor	Hydrolysis	Adenine binding
RecA	W-A	W-A	RF	CE	-
		W-B
ABC	W-A	W-A	C	CE	-
		W-B		D
				H
				Q
AAA+	W-A	W-A	RF	CE	-
		W-B	SII	SI
GHL	III	I	V	I	II
					IV
Actin	III	I	-	VI	IV
		II
		III
Chaperonin	III	I	-	II	V
		II
		III
		IV