Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4705
Number of amino acids:269
Molecular Weight:29213.46 Da
Theoretical pI:7.12


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)4215.61%
Cysteine CYS (C)10.37%
Glutamic Acid GLU (E)10.37%
Aspartic Acid ASP (D)10.37%
Glycine GLY (G)51.86%
Phynylalanine PHE (F)72.6%
Isoleucine ILE (I)155.58%
Histidine HIS (H)41.49%
Lysine LYS (K)10.37%
Methionine MET (M)31.12%
Leucine LEU (L)4315.99%
Asparagine ASN (N)155.58%
Glutamine GLN (Q)6323.42%
Proline PRO (P)186.69%
Serine SER (S)165.95%
Arginine ARG (R)10.37%
Threonine THR (T)134.83%
Tryptophan TRP (W)10.37%
Valine VAL (V)124.46%
Tyrosine TYR (Y)72.6%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1309
HydrogenH2096
NitrogenN360
OxygenO388
SulphurS4

FormulaC1309H2096N360O388S4
Total Number of Atoms:4157


Total number of positively charged residues (ARG + LYS):2
Total number of negatively charged residues (ASP + GLU):2
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    15930
Absorption 0.1% (=1 g/l)    0.545,   assuming all pairs of CYS residues form cystines

Ext. coefficient    15930
Absorption 0.1% (=1 g/l)    0.545,   assuming all CYS residues are reduced
Aromaticity:0.056

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 59.96

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.60, 20.07, 33.09]

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:112.639
Grand average of hydropathicity (GRAVY):0.08