Structural Classification of Proteins

Scop Classification Statistics

SCOP: Structural Classification of Proteins. 1.75 release
38221 PDB Entries (23 Feb 2009). 110800 Domains. 1 Literature Reference
(excluding nucleic acids and theoretical models)

Class	Number of folds	Number of superfamilies	Number of families
All alpha proteins	284	507	871
All beta proteins	174	354	742
Alpha and beta proteins (a/b)	147	244	803
Alpha and beta proteins (a+b)	376	552	1055
Multi-domain proteins	66	66	89
Membrane and cell surface proteins	58	110	123
Small proteins	90	129	219
Total	1195	1962	3902

Scop Classification Statistics

SCOP: Structural Classification of Proteins. 1.73 release
34494 PDB Entries (26 Sep 2007). 97178 Domains. 1 Literature Reference
(excluding nucleic acids and theoretical models)

Class	Number of folds	Number of superfamilies	Number of families
All alpha proteins	259	459	772
All beta proteins	165	331	679
Alpha and beta proteins (a/b)	141	232	736
Alpha and beta proteins (a+b)	334	488	897
Multi-domain proteins	53	53	74
Membrane and cell surface proteins	50	92	104
Small proteins	85	122	202
Total	1086	1777	3464

Scop Classification Statistics

SCOP: Structural Classification of Proteins. 1.71 release
27599 PDB Entries (18 Jan 2005). 75930 Domains. 1 Literature Reference
(excluding nucleic acids and theoretical models)

Class	Number of folds	Number of superfamilies	Number of families
All alpha proteins	226	392	645
All beta proteins	149	300	594
Alpha and beta proteins (a/b)	134	221	661
Alpha and beta proteins (a+b)	286	424	753
Multi-domain proteins	48	48	64
Membrane and cell surface proteins	49	90	101
Small proteins	79	114	186
Total	971	1589	3004

Scop Classification Statistics

SCOP: Structural Classification of Proteins. 1.69 release
25973 PDB Entries (1 Oct 2004). 70859 Domains. 1 Literature Reference
(excluding nucleic acids and theoretical models)

Class	Number of folds	Number of superfamilies	Number of families
All alpha proteins	218	376	608
All beta proteins	144	290	560
Alpha and beta proteins (a/b)	136	222	629
Alpha and beta proteins (a+b)	279	409	717
Multi-domain proteins	46	46	61
Membrane and cell surface proteins	47	88	99
Small proteins	75	108	171
Total	945	1539	2845

Scop Classification Statistics

SCOP: Structural Classification of Proteins. 1.67 release
24037 PDB Entries (15 May 2004). 65122 Domains. 1 Literature Reference
(excluding nucleic acids and theoretical models)

Class	Number of folds	Number of superfamilies	Number of families
All alpha proteins	202	342	550
All beta proteins	141	280	529
Alpha and beta proteins (a/b)	130	213	593
Alpha and beta proteins (a+b)	260	386	650
Multi-domain proteins	40	40	55
Membrane and cell surface proteins	42	82	91
Small proteins	72	104	162
Total	887	1447	2630

NOTE: several new entries are due to rearrangements of the classification

Scop Classification Statistics

SCOP: Structural Classification of Proteins. 1.65 release
20619 PDB Entries (1 August 2003). 54745 Domains. 1 Literature Reference
(excluding nucleic acids and theoretical models)

Class	Number of folds	Number of superfamilies	Number of families
All alpha proteins	179	299	480
All beta proteins	126	248	462
Alpha and beta proteins (a/b)	121	199	542
Alpha and beta proteins (a+b)	234	349	567
Multi-domain proteins	38	38	53
Membrane and cell surface proteins	36	66	73
Small proteins	66	95	150
Total	800	1294	2327

NOTE: several new entries are due to rearrangements of the classification

Scop Classification Statistics

SCOP: Structural Classification of Proteins. 1.63 release
18946 PDB Entries (1 March 2003). 49497 Domains. 28 Literature References
(excluding nucleic acids and theoretical models)

Class	Number of folds	Number of superfamilies	Number of families
All alpha proteins	171	286	457
All beta proteins	119	234	418
Alpha and beta proteins (a/b)	117	192	501
Alpha and beta proteins (a+b)	224	330	532
Multi-domain proteins	39	39	50
Membrane and cell surface proteins	34	64	71
Small proteins	61	87	135
Total	765	1232	2164

NOTE: several new entries are due to rearrangements of the classification

Scop Classification Statistics

SCOP: Structural Classification of Proteins. 1.61 release
17406 PDB Entries (1 September 2002). 44327 Domains. 28 Literature References
(excluding nucleic acids and theoretical models)

Class	Number of folds	Number of superfamilies	Number of families
All alpha proteins	151	257	409
All beta proteins	111	213	362
Alpha and beta proteins (a/b)	117	190	467
Alpha and beta proteins (a+b)	212	308	488
Multi-domain proteins	39	39	52
Membrane and cell surface proteins	12	19	34
Small proteins	59	84	128
Total	701	1110	1940

Scop Classification Statistics

SCOP: Structural Classification of Proteins. 1.59 release
15979 PDB Entries (1 March 2002). 39893 Domains. 30 Literature References
(excluding nucleic acids and theoretical models)

Class	Number of folds	Number of superfamilies	Number of families
All alpha proteins	151	252	393
All beta proteins	110	205	337
Alpha and beta proteins (a/b)	113	185	438
Alpha and beta proteins (a+b)	208	295	454
Multi-domain proteins	34	34	46
Membrane and cell surface proteins	12	19	31
Small proteins	58	83	128
Total	686	1073	1827

Scop Classification Statistics

SCOP: Structural Classification of Proteins. 1.57 release
14729 PDB Entries (1 Oct 2001). 35685 Domains. 35 Literature References
(excluding nucleic acids and theoretical models)

Class	Number of folds	Number of superfamilies	Number of families
All alpha proteins	144	231	363
All beta proteins	104	190	303
Alpha and beta proteins (a/b)	107	180	409
Alpha and beta proteins (a+b)	194	276	428
Multi-domain proteins	32	32	45
Membrane and cell surface proteins	11	17	28
Small proteins	56	81	123
Total	648	1007	1699

Scop Classification Statistics

SCOP: Structural Classification of Proteins. 1.55 release
13220 PDB Entries (1 Mar 2001). 31474 Domains. 39 Literature References
(excluding nucleic acids and theoretical models)

Class	Number of folds	Number of superfamilies	Number of families
All alpha proteins	138	224	337
All beta proteins	93	171	276
Alpha and beta proteins (a/b)	97	167	374
Alpha and beta proteins (a+b)	184	263	391
Multi-domain proteins	28	28	35
Membrane and cell surface proteins	11	17	28
Small proteins	54	77	116
Total	605	947	1557

Scop Classification Statistics

SCOP: Structural Classification of Proteins. 1.53 release
11410 PDB Entries (1 Jul 2000). 26219 Domains. 40 Literature References
(excluding nucleic acids and theoretical models)

Class	Number of folds	Number of superfamilies	Number of families
All alpha proteins	128	197	296
All beta proteins	87	158	251
Alpha and beta proteins (a/b)	93	153	323
Alpha and beta proteins (a+b)	168	237	345
Multi-domain proteins	25	25	32
Membrane and cell surface proteins	11	17	19
Small proteins	52	72	102
Total	564	859	1368

Scop Classification Statistics

SCOP: Structural Classification of Proteins. 1.50 release
10650 PDB Entries (29 Feb 2000). 24186 Domains. 45 Literature References
(excluding nucleic acids and theoretical models)

Class	Number of folds	Number of superfamilies	Number of families
All alpha proteins	127	186	278
All beta proteins	87	154	243
Alpha and beta proteins (a/b)	92	147	300
Alpha and beta proteins (a+b)	159	224	330
Multi-domain proteins	23	23	30
Membrane and cell surface proteins	10	16	18
Small proteins	50	70	97
Total	548	820	1296

Scop Classification Statistics

SCOP: Structural Classification of Proteins. 1.48 release
9912 PDB Entries (1 Nov 1999). 22140 Domains. 51 Literature References
(excluding nucleic acids and theoretical models)

Class	Number of folds	Number of superfamilies	Number of families
All alpha proteins	126	175	263
All beta proteins	81	147	228
Alpha and beta proteins (a/b)	87	135	277
Alpha and beta proteins (a+b)	151	214	309
Multi-domain proteins	21	21	27
Membrane and cell surface proteins	10	16	18
Small proteins	44	63	90
Total	520	771	1212

Scop Classification Statistics

SCOP: Structural Classification of Proteins. 1.39 release
7981 PDB Entries (1 Aug 1998). 18068 Domains. 75 Literature References
(including nucleic acids and theoretical models)

Class	Number of folds	Number of superfamilies	Number of families
All alpha proteins	107	148	212
All beta proteins	70	127	186
Alpha and beta proteins (a/b)	84	123	223
Alpha and beta proteins (a+b)	113	163	223
Multi-domain proteins	20	20	26
Membrane and cell surface proteins	12	18	19
Small proteins	41	58	78
Total	447	657	967

Scop Classification Statistics

SCOP: Structural Classification of Proteins. 1.37 release
6497 PDB Entries (20 Oct 1997). 13073 Domains. 101 Literature References
(including nucleic acids and theoretical models)

Class	Number of folds	Number of superfamilies	Number of families
All alpha proteins	97	126	178
All beta proteins	61	112	163
Alpha and beta proteins (a/b)	75	110	188
Alpha and beta proteins (a+b)	101	146	201
Multi-domain proteins	20	20	25
Membrane and cell surface proteins	10	16	17
Small proteins	41	58	78
Total	405	558	850

June 2009