Table 1.
Protein classa | Cutting levelb | No. protein chainsc | No. building blocksd | No. clusterse | Average sequence lengthf | No. building block sequencesg |
α/β | 1 | 1514 | 2121 | 515 | 154.08 | 464 |
2 | 1514 | 5257 | 1286 | 62.55 | 1804 | |
3 | 1514 | 8013 | 1899 | 38.75 | 3153 | |
4 | 1495 | 7813 | 1727 | 30.86 | 3137 | |
5 | 1174 | 9944 | 2124 | 29.37 | 3872 | |
6 | 595 | 5663 | 1402 | 28.94 | 2493 | |
α + β | 1 | 1619 | 2491 | 379 | 108.58 | 457 |
2 | 1616 | 5445 | 828 | 49.45 | 1212 | |
3 | 1558 | 7454 | 1199 | 34.08 | 1929 | |
4 | 1339 | 7702 | 1285 | 28.98 | 2175 | |
5 | 520 | 4361 | 1089 | 28.38 | 1716 | |
6 | 153 | 1606 | 628 | 28.62 | 878 | |
all-α | 1 | 870 | 1419 | 405 | 85.88 | 548 |
2 | 870 | 3181 | 751 | 41.81 | 1422 | |
3 | 794 | 3858 | 830 | 30.82 | 1921 | |
4 | 594 | 2971 | 727 | 28.62 | 1502 | |
5 | 263 | 2662 | 707 | 28.06 | 2131 | |
6 | 94 | 1299 | 466 | 29.28 | 722 | |
all-β | 1 | 1313 | 1757 | 428 | 115.47 | 514 |
2 | 1311 | 3814 | 1049 | 53.58 | 1489 | |
3 | 1299 | 5815 | 1566 | 36.66 | 2449 | |
4 | 1132 | 4683 | 1456 | 32.23 | 2200 | |
5 | 523 | 4068 | 1283 | 30.46 | 1898 | |
6 | 167 | 1914 | 729 | 30.70 | 1018 |
a The protein class that created the specific database.
b The cutting level (1 to 6).
c The number of protein chains participating in that database.
d The total number of building blocks in that database.
e The number of clusters resulting from the clustering procedure of that database.
f The average sequence size at each nonredundant sequence database.
g The number of sequences in the nonredundant sequence database.
The data here was calculated only from the representatives of the clusters to avoid bias toward large families that contain nearly identical building blocks.