Table VI.
Comparison of Relative Accessible Surface Area in Amyloidogenic and Non-amyloidogenic Helical Residues
| No. of helical residuesa |
Average relative ASA per helical residueb % |
|||||
|---|---|---|---|---|---|---|
| Protein | PDB ID | Amyloidogenic sequence(s) containing residues in helical conformation | Amyloidogenic | Nonamyloidogenic | Amyloidogenic | Nonamyloidogenic |
| α-Synuclein | 1XQ8 | 51–56 | 28 | 53 | 62.5 | 65.0 |
| 66–74 | ||||||
| 77–82 | ||||||
| 86–92 | ||||||
| β-Lactoglobulin | 1BEB dimer | 11–20c | 4 | 28 | 53.0 | 39.8 |
| AcP | 1APS | 16–31c | 7 | 10 | 13.8 | 7.9 |
| Amphoterin | 1CKT | 12–27 | 14 | 34 | 20.4 | 34.4 |
| ApoC-II | 1SOH | 60–70 | 6 | 23 | 56.3 | 56.1 |
| Insulin | 1XDA(1) | 13–18 | 13 | 14 | 44.4 | 41.4 |
| 11–17 | ||||||
| Kerato-epithelin | 1X3B | 515–525 (21–32 in 1X3B) | 8 | 33 | 33.8 | 35.1 |
| Lysozyme | 1REX | 55–61 | 1 | 42 | 0 | 24.0 |
| Myoglobin | 1WLA | 101–118 | 17 | 94 | 24.3 | 31.1 |
| Prolactin | 1RW5 | 7–34 | 21 | 97 | 27.2 | 25.0 |
| 43–57 | ||||||
| hPrP | 1QLX | 138–144c | 16 | 38 | 34.4 | 37.7 |
| 170–175c | ||||||
| 178–193c | ||||||
| repA pPS10 | 1HKQ dimer | 26–34 | 10 | 80 | 12.2 | 29.2 |
| M. jannaschii tRNA endonuclease | 1A79 tetramer | 47–53 | 28 | 190 | 2.86 | 25.9 |
| Enterotoxin, S. aureus | 2NTT dimer | 50–54 | 8 | 58 | 38.4 | 16.4 |
| Cytochrome b Rhodobacter sphaeroides | 2QJP(1) (Chains A&D) | 337–341 | 10 | 526 | 25.0 | 21.2 |
| Thymidine kinase, cystolic, human | 1W4R (Chains A,B,C&D) | 133–137 | 8 | 167 | 2.79 | 24.6 |
| Mean ± SD | 28 ± 19 | 32 ± 14 | ||||
| t-test, t | −0.66 | |||||
| t-test, df | 27.49 | |||||
| t-test, P-value | 0.52 | |||||
| Mann-Whitney test, P-value | 0.49 | |||||
Secondary structure according to DeepView: Swiss-PdbViewer (Guex and Peitsch, 1997).
Accessible surface area (ASA), average relative surface area per residue (%) computed by the NACCESS program (Hubbard and Thornton, 1993).
One of two or more amyloidogenic sequences in given protein: only this sequence has residues in helical conformation.