Amino Acid Properties HEADING_TITLE

 

 

Type Acidic Basic
Amino Acid Aspartic Acid Glutamic Acid Histidine Arginine Lysine
Structure
Three Letter Code Asp Glu His Arg Lys
One Letter Code D E H R K
Molecular Formula C4H7NO4 C5H9NO4 C6H9N3O2 C6H14N4O2 C6H14N2O2
Molecular Weight 133.1 147.1 155.2 174.2 146.2
Residue Formula C4H5NO3 C5H7NO3 C6H7N3O C6H12N4O C6H12N2O
Residue Weight 115.1 129.1 137.1 156.2 128.2
pI at 25 C (Isoelectric Point) 2.98 3.08 7.64 10.76 9.47
Hydrophobicity Low Low Moderate Very Low Very Low
alpha-Helix Forming Moderate Strong Moderate Moderate Moderate
beta-Sheet Forming Weak Weak Weak Moderate Weak
Turn Forming Strong Weak Moderate Moderate Moderate

 

Type Polar
Amino Acid Cysteine Asparagine Glutamine Serine Threonine
Structure
Three Letter Code Cys Asn Gln Ser Thr
One Letter Code C N Q S T
Molecular Formula C3H7NO2S C4H8N2O3 C5H10N2O3 C3H7NO3 C4H9NO3
Molecular Weight 121.2 132.1 146.1 105.1 119.1
Residue Formula C3H5NOS C4H6N2O2 C5H8N2O2 C3H5NO2 C4H7NO2
Residue Weight 103.1 114.1 128.1 87.1 101.1
pI at 25 C (Isoelectric Point) 5.02 2.77 5.65 5.68 5.64
Hydrophobicity High Low Low Moderate Moderate
alpha-Helix Forming Weak Weak Moderate Weak Weak
beta-Sheet Forming Moderate Moderate Moderate Weak Moderate
Turn Forming Moderate Strong Moderate Strong Moderate

 

Type Aromatic Aliphatic
Amino Acid Phenylalanine Tyrosine Tryptophan Glycine Alanine
Structure
Three Letter Code Phe Tyr Trp Gly Ala
One Letter Code F Y W G A
Molecular Formula C9H11NO2 C9H11NO3 C11H12N2O2 C2H5NO2 C3H7NO2
Molecular Weight 165.2 181.2 204.2 75.1 89.1
Residue Formula C9H9NO C9H9NO2 C11H10N2O C2H3NO C3H5NO
Residue Weight 147.2 163.2 186.2 57.1 71.1
pI at 25 C (Isoelectric Point) 5.91 5.63 5.88 6.064 6.107
Hydrophobicity Very High Moderate High High High
alpha-Helix Forming Moderate Weak Moderate Weak Strong
beta-Sheet Forming Strong Strong Strong Weak Weak
Turn Forming Weak Moderate Moderate Strong Weak

 

Type Aliphatic    
Amino Acid Valine Leucine Isoleucine Methionine Proline
Structure
Three Letter Code Val Leu Ile Met Pro
One Letter Code V L I M P
Molecular Formula C5H11NO2 C6H13NO2 C6H13NO2 C5H11NO2S C5H9NO2
Molecular Weight 117.7 131.2 131.2 149.2 115.1
Residue Formula C5H9NO C6H11NO C6H11NO C5H9NOS C5H7NO
Residue Weight 99.1 113.2 113.2 131.2 97.1
pI at 25 C (Isoelectric Point) 6.002 6.036 6.038 5.74 6.3
Hydrophobicity Very High Very High Very High High Moderate
alpha-Helix Forming Moderate Strong Moderate Strong Weak
beta-Sheet Forming Strong Strong Strong Moderate Weak
Turn Forming Weak Weak Weak Weak Strong