Table 3 The amino acid attributes and division of the amino acids into group
From: Unsupervised clustering of SARS-CoV-2 using deep convolutional autoencoder
No. | Attribute | Group 1 | Group 2 | Group 3 |
|---|---|---|---|---|
1 | Hydrophobicity | Polar {D/E/K/N/R/Q} | Neutral {A/G/H/S/P/T/Y} | Hydrophobic {C/I/L/F/M/V/W} |
2 | Polarizability | (0–1.08) {A/D/G/S/T} | (0.128–0.186) {C/E/I/L/N/P/Q/V} | (0.219–0.409) {F/H/K/M/R/W/Y} |
3 | Normalized van-der Waals volume | (0–2.78) {A/C/D/G/S/T/P} | (2.95–4.0) {E/I/L/N/Q/V} | (2.95–4.0) {F/H/K/M/R/W/Y} |
4 | Polarity | (4.9–6.2) {C/F/L/I/M/V/W/Y} | (8.0–9.2) {A/G/S/T/P} | (10.4–13.0) {E/D/H/K/N/Q/R} |
5 | Solvent accessibility | Buried {A/L/F/C/G/I/V/W} | Exposed {R/K/Q/E/N/D} | Intermediate {M/S/P/T/H/Y} |
6 | Secondary structure | Helix {E/A/L/M/Q/K/R/H} | Strand {V/I/Y/C/W/F/T} | Coil {G/N/P/S/D} |
7 | Charge | Positive {R/K} | Neutral {A/N/C/Q/G/H/I/L/M/F/ P/S/T/W/Y/} | Negative {E/D} |