Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4573
Number of amino acids:532
Molecular Weight:58570.51 Da
Theoretical pI:6.58


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)7313.72%
Cysteine CYS (C)61.13%
Glutamic Acid GLU (E)234.32%
Aspartic Acid ASP (D)366.77%
Glycine GLY (G)499.21%
Phynylalanine PHE (F)173.2%
Isoleucine ILE (I)122.26%
Histidine HIS (H)193.57%
Lysine LYS (K)101.88%
Methionine MET (M)91.69%
Leucine LEU (L)489.02%
Asparagine ASN (N)122.26%
Glutamine GLN (Q)163.01%
Proline PRO (P)203.76%
Serine SER (S)376.95%
Arginine ARG (R)458.46%
Threonine THR (T)254.7%
Tryptophan TRP (W)122.26%
Valine VAL (V)346.39%
Tyrosine TYR (Y)295.45%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2598
HydrogenH3959
NitrogenN755
OxygenO770
SulphurS15

FormulaC2598H3959N755O770S15
Total Number of Atoms:8097


Total number of positively charged residues (ARG + LYS):55
Total number of negatively charged residues (ASP + GLU):59
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    109585
Absorption 0.1% (=1 g/l)    1.871,   assuming all pairs of CYS residues form cystines

Ext. coefficient    109210
Absorption 0.1% (=1 g/l)    1.865,   assuming all CYS residues are reduced
Aromaticity:0.109

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.40

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.57, 22.18, 28.76]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:76.2406
Grand average of hydropathicity (GRAVY):-0.31