Table 3.
Structural and sequential properties of words in Wset≥30 according to the statistical word type
| Words characteristic | Wset≥30 | URw | NSw | ORw |
|---|---|---|---|---|
| Average RMSdw (Å) | 0.85 | 0.94 | 0.89 | 0.74* |
| (± standard deviation) | (± 0.4) | (± 0.4) | (± 0.4) | (± 0.3) |
| Average RMSddev (Å) | 2.72 | 2.67 | 2.69 | 2.76 |
| (± standard deviation) | (± 0.6) | (± 0.6) | (± 0.6) | (± 0.7) |
| AverageZmax | 10.3 | 9.5 | 8.8 | 14.0* |
| (± standard deviation) | (± 6.1) | (± 3.8) | (± 4.0) | (± 8.4) |
| Average nbpos* | 3.3 | 3.0 | 2.9 | 4.1* |
| (± standard deviation) | (± 1.8) | (± 1.7) | (± 1.6) | (± 1.8) |
| Average dZ-score | 31.1 | 29.0 | 27.4 | 39.5* |
| (± standard deviation) | (± 9.7) | (± 5.7) | (± 5.3) | (± 13.8) |
The upper part of the table corresponds to the analysis of word structural properties. The intra-word structural variability is analysed using the Root Mean Square deviation (RMSd) between fragments corresponding to the same word (RMSdw). The inter-word structural variability is analysed using the RMSd between fragments of two different words (RMSddev). The lower part of the table corresponds to the analysis of sequential properties of words. The intra-word amino-acid preferences of a word are analysed using Zmax criterion (cf. Method section) and the number of significant position of a word (nbpos*). The coverage of sequential space is analysed using the Euclidian distance between Z-score vectors (cf. Method section) (dZ-score). Numbers within brackets indicate standard deviations. *: significant differences according to the Kruskal-Wallis test. The RMSddev are computed on a subset of 890 words of Wset≥30. a: words shared by long and short loops.