Structural Classification of Proteins
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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



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June 2009