Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5908
Number of amino acids:80
Molecular Weight:8873.39 Da
Theoretical pI:8.2


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)810%
Cysteine CYS (C)810%
Glutamic Acid GLU (E)45%
Aspartic Acid ASP (D)00%
Glycine GLY (G)56.25%
Phynylalanine PHE (F)67.5%
Isoleucine ILE (I)56.25%
Histidine HIS (H)22.5%
Lysine LYS (K)33.75%
Methionine MET (M)22.5%
Leucine LEU (L)67.5%
Asparagine ASN (N)67.5%
Glutamine GLN (Q)22.5%
Proline PRO (P)33.75%
Serine SER (S)56.25%
Arginine ARG (R)33.75%
Threonine THR (T)33.75%
Tryptophan TRP (W)11.25%
Valine VAL (V)56.25%
Tyrosine TYR (Y)33.75%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC395
HydrogenH605
NitrogenN105
OxygenO108
SulphurS10

FormulaC395H605N105O108S10
Total Number of Atoms:1223


Total number of positively charged residues (ARG + LYS):6
Total number of negatively charged residues (ASP + GLU):4
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    10470
Absorption 0.1% (=1 g/l)    1.180,   assuming all pairs of CYS residues form cystines

Ext. coefficient    9970
Absorption 0.1% (=1 g/l)    1.124,   assuming all CYS residues are reduced
Aromaticity:0.125

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.88

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.50, 23.75, 25.00]

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:81.75
Grand average of hydropathicity (GRAVY):0.38