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Table 3 Associations between structural correlations and secondary structure types

From: An automatic method for assessing structural importance of amino acid positions

SS

Chi-sq.

Significance

N

Category

Bend

27.7

< 1e-05

2140

Informative

Alpha Helix

166.1

< 1e-14

13021

Uninformative

Turn

26.3

< 2e-05

3527

Neutral

Coil

15.0

< 4e-03

5056

Neutral

3/10 Helix

75.1

< 1e-14

1568

Uninformative

Bridge

2.2

> 0.05

406

Not Significant

Strand

114.6

< 1e-14

2960

Neutral

  1. Chi-squared values with significance levels are shown for each of seven secondary structure (SS) types as defined by DSSP (no structure in the dataset contained a pi-helix). Significance values are corrected for seven tests using Bonferroni's correction. The "category" column indicates the direction of correlation overrepresented for that class where probabilities were significant at the 5% level.