Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4938
Number of amino acids:285
Molecular Weight:32190.39 Da
Theoretical pI:5.74


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)175.96%
Cysteine CYS (C)62.11%
Glutamic Acid GLU (E)93.16%
Aspartic Acid ASP (D)165.61%
Glycine GLY (G)227.72%
Phynylalanine PHE (F)186.32%
Isoleucine ILE (I)155.26%
Histidine HIS (H)20.7%
Lysine LYS (K)175.96%
Methionine MET (M)62.11%
Leucine LEU (L)238.07%
Asparagine ASN (N)217.37%
Glutamine GLN (Q)113.86%
Proline PRO (P)113.86%
Serine SER (S)227.72%
Arginine ARG (R)62.11%
Threonine THR (T)248.42%
Tryptophan TRP (W)124.21%
Valine VAL (V)144.91%
Tyrosine TYR (Y)134.56%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1467
HydrogenH2182
NitrogenN368
OxygenO427
SulphurS12

FormulaC1467H2182N368O427S12
Total Number of Atoms:4456


Total number of positively charged residues (ARG + LYS):23
Total number of negatively charged residues (ASP + GLU):25
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    85745
Absorption 0.1% (=1 g/l)    2.664,   assuming all pairs of CYS residues form cystines

Ext. coefficient    85370
Absorption 0.1% (=1 g/l)    2.652,   assuming all CYS residues are reduced
Aromaticity:0.151

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 28.62

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.33, 26.67, 19.30]

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:72.2105
Grand average of hydropathicity (GRAVY):-0.23