Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5834
Number of amino acids:204
Molecular Weight:22800.28 Da
Theoretical pI:6.18


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)136.37%
Cysteine CYS (C)52.45%
Glutamic Acid GLU (E)115.39%
Aspartic Acid ASP (D)125.88%
Glycine GLY (G)146.86%
Phynylalanine PHE (F)136.37%
Isoleucine ILE (I)146.86%
Histidine HIS (H)20.98%
Lysine LYS (K)136.37%
Methionine MET (M)41.96%
Leucine LEU (L)188.82%
Asparagine ASN (N)94.41%
Glutamine GLN (Q)73.43%
Proline PRO (P)115.39%
Serine SER (S)136.37%
Arginine ARG (R)94.41%
Threonine THR (T)115.39%
Tryptophan TRP (W)20.98%
Valine VAL (V)167.84%
Tyrosine TYR (Y)73.43%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1032
HydrogenH1610
NitrogenN266
OxygenO298
SulphurS9

FormulaC1032H1610N266O298S9
Total Number of Atoms:3215


Total number of positively charged residues (ARG + LYS):22
Total number of negatively charged residues (ASP + GLU):23
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    21680
Absorption 0.1% (=1 g/l)    0.951,   assuming all pairs of CYS residues form cystines

Ext. coefficient    21430
Absorption 0.1% (=1 g/l)    0.940,   assuming all CYS residues are reduced
Aromaticity:0.108

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.58

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.31, 23.04, 22.55]

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:90.2941
Grand average of hydropathicity (GRAVY):-0.04