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Table 2 Contact Prediction Results of Proteins in the Six SCOP Structure Classes.

From: Improved residue contact prediction using support vector machines and a large feature set

SCOP Class Num Separation >= 6 Separation >= 12 Separation >= 24
   Accuracy Coverage Accuracy Coverage Accuracy Coverage
alpha 11 0.24 0.24 0.17 0.18 0.11 0.09
beta 10 0.38 0.17 0.32 0.17 0.22 0.17
a+b 15 0.45 0.25 0.35 0.25 0.21 0.23
a/b 7 0.37 0.19 0.33 0.19 0.28 0.20
small 4 0.36 0.18 0.28 0.19 0.11 0.15
coil-coil 1 0.22 0.40 0.03 0.16 0.00 --
average 48 0.37 0.21 0.30 0.20 0.21 0.19
  1. Column 1 lists six structure classes. Column 2 lists the number of proteins in each class. Other columns reports the accuracy and coverage of contact predictions in each category. The statistics is computed for sequence separation >= 6, 12, and 24, respectively. The last row reports the average performance on all 48 proteins. The accuracy of a+b and a/b is slightly higher than that of beta proteins, which is in turn higher than that of alpha proteins. The performance on small proteins (mostly alpha helical) lies between proteins containing beta-sheets (a+b, a/b, and beta) and alpha helical proteins. There is only one coil-coil protein, which does not have native contacts with sequence separation >= 24.