TABLE 1.

Classification of protein motions in Gerstein's Database of Macromolecular Movements (4,5)

Motion scale	Motion type	# of Pairs
I. Motions of fragments smaller than domains	A. Motion is predominantly shear	11
	B. Motion is predominantly hinge	21
	C. Motion can not be fully classified at present	10
	D. Motion is not hinge or shear	6
II. Domain motions	A. Motion is predominantly shear	27
	B. Motion is predominantly hinge	59
	C. Motion can not be fully classified at present	10
	D. Motion is not hinge or shear	2
	E. Motion involves partial refolding of tertiary structure	6
III. Larger movements than domain movements involving the motion of subunits	A. Motion involves an allosteric transition	9
	B. Motion does not involves an allosteric transition	4
	C. Complex protein motions	5

The categories in motion scale and motion type are the same as those used in the Gerstein's database.