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Figure 3 | BMC Structural Biology

Figure 3

From: A generalized analysis of hydrophobic and loop clusters within globular protein sequences

Figure 3

Amino acid composition of the two (preferred and non-preferred) regular secondary structures associated with two typical hydrophobic cluster species. The preferred secondary structures of hydrophobic cluster species 153 and 29 correspond to the alpha-helix and to the beta strand, respectively. Values are indicated for the preferred and non-preferred secondary structures within the 90% redundancy database (black), and only for the preferred secondary structure within the 25 % database (grey). Within the 25 % database, the cluster occurrence is indeed too low for the non-preferred secondary structure. 153: 90% level: 461 clusters (81.1 % helices and 11.1 % strands); 25% level: 211 clusters (79.6 % helices and 9.5 % strands). 29: 90% level: 1079 clusters (18.9 % helices and 71.4 % strands); 25% level: 498 clusters (18.5 % helices and 72.9 % strands). Arrows indicate noticeable behaviors of amino acids, with respect to helices or strands.

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