Classification of alpha-beta loops

Click the class numbers (e.g. 0.1.1) to see the loop picture.

Class	CN	D	Delta	Theta	Rho	NR	RMSD(Å)	Consensus	Nomenclature
aa{}bb (15 loops)	0.1.1	3	45-90	45-90	135-180	0,1,2	1.1 ± 0.4	XphX aabb	New
	0.1.2	3	0-45	0-45	90-135	1,2	1.9 ± 0.2	pphX aabb	New
	0.1.3	9	45-90	45-90	45-90	2,4	1.1 ± 0.2	phXp aabb	New
aa{g}bb (89 loops)	1.1.1	5	45-90	90-135	90-135	1,2,3	1.0 ± 0.6	phGhX aagbb	a(m)gaLb conformation
	1.1.2	7	90-135	135-180	90-135	2,3,4	0.7 ± 0.4	ppGhpp aagbb	a(m)gaLb conformation
	1.1.3	7	90-135	90-135	135-180	1,2,3	1.2 ± 0.2	XpGhp aagpb	a(m)gaLb conformation
	1.1.4	7	90-135	135-180	45-90	2,3,4	1.4 ± 0.5	ppphh aagbb	a(m)gaLb conformation
	1.1.5	7	45-90	135-180	90-135	4	1.3 ± 0.3	ppGhp aagbb	a(m)gaLb conformation
	1.1.6	9	90-135	135-180	135-180	2,3,4	0.8 ± 0.3	pXGhp aagbb	a(m)gaLb conformation
aa{l}bb (57 loops)	1.2.1	7	90-135	135-180	90-135	1	1.3 ± 0.3	phGhX aalbb	a(m)gaLb conformation
	1.2.2	9	90-135	135-180	90-135	1,2,3,4	1.3 ± 0.4	ppGhx aalbb	a(m)gaLb conformation
	1.2.3	9	90-135	135-180	45-90	2,3,4,5	1.3 ± 0.4	ppGhX aalbb	a(m)gaLb conformation
	1.2.4	9	90-135	90-135	45-90	2,3,4	1.5 ± 0.3	pXXXX aalbb	a(m)gaLb conformation
	1.2.5	11	90-135	135-180	45-90	3,4	1.7 ± 0.3	ppGhp aalbp	a(m)gaLb conformation
	1.2.6	13	90-135	135-180	0-45	3,4,5	1.2 ± 0.3	XhXXX aalbb	a(m)gaLb conformation
aa{p}bb (9 loops)	1.3.1	5	45-90	45-90	90-135	0,1	1.2 ± 0.1	ppGph aapbb	New
aa{p}bb (9 loops)	1.3.2	7	0-45	45-90	90-135	2,3	1.1 ± 0.3	hphph aapbb	New
aa{ba}bb (8 loops)	2.1.1	9	45-90	135-180	45-90	3,5	1.0 ± 0.2	XXXphh aababb	babb transition
aa{ba}bb (8 loops)	2.1.2	9	45-90	135-180	0-45	4,5,6	1.1 ± 0.2	phVDhh aababb	babb transition
aa{gp}bb (11 loops)	2.2.1	7	90-135	135-180	45-90	1,2,3,4,5	1.5 ± 0.8	ppGhXh aagpbb	a(m)gaLb conformation
aa{gp}bb (11 loops)	2.2.2	7	45-90	90-135	90-135	2,3	1.8 ± 0.4	ppXhhp aalpbb	a(m)gaLb conformation
aa{la}aa (6 loops)	2.3.1	7	45-90	90-135	135-180	2,3,4	1.7 ± 0.7	ppXXhp aalabb	New
aa{gpa}bb (29 loops)	3.1.1	9	90-135	135-180	0-45	3,4,5	1.9 ± 0.4	XXGhphh aagpabb	a(m)gaLbab(n)
aa{lpa}bb (18 loops)	3.2.1	9	90-135	135-180	0-45	4,5,6	1.4 ± 0.6	XXGhphh aalpabb	a(m)gaLbab(n)
aa{baa}bb (5 loops)	3.3.1	9	90-135	135-180	0-45	3,4,5	1.0 ± 0.2	XXXPpAp aabaabb	bagb transition
aa{laba}bb (8 loops)	4.1.1	11	90-135	135-180	0-45	5,6	1.2 ± 0.2	ppGhhphh aalababb	a(m)gaLababb(n) conformation
aa{laba}bb (8 loops)	4.1.2	9	45-90	135-180	135-180	4,5,6	1.6 ± 0.3	pppXhDXh aalababb	a(m)gaLababb(n) conformation
aa{gpae}bb (5 loops)	4.2.1	9	90-135	135-180	0-45	3,4	0.8 ± 0.3	XXGAXGhh aagpaebb	New Mainly found in the FMN family
aa{baalal}bb (7 loops)	6.1.1	9	90-135	45-90	0-45	6,7	1.1 ± 0.6	XhDXpppXXh aabaalalbb	EF-hand (Ca2+ binding loop)

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Last modified: 09-September-1997