Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3449
Number of amino acids:59
Molecular Weight:7494.96 Da
Theoretical pI:6.33


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)00%
Cysteine CYS (C)46.78%
Glutamic Acid GLU (E)1118.64%
Aspartic Acid ASP (D)00%
Glycine GLY (G)35.08%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)00%
Histidine HIS (H)35.08%
Lysine LYS (K)46.78%
Methionine MET (M)00%
Leucine LEU (L)11.69%
Asparagine ASN (N)35.08%
Glutamine GLN (Q)1830.51%
Proline PRO (P)00%
Serine SER (S)23.39%
Arginine ARG (R)610.17%
Threonine THR (T)00%
Tryptophan TRP (W)11.69%
Valine VAL (V)00%
Tyrosine TYR (Y)35.08%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC303
HydrogenH469
NitrogenN109
OxygenO108
SulphurS4

FormulaC303H469N109O108S4
Total Number of Atoms:993


Total number of positively charged residues (ARG + LYS):10
Total number of negatively charged residues (ASP + GLU):11
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    10220
Absorption 0.1% (=1 g/l)    1.364,   assuming all pairs of CYS residues form cystines

Ext. coefficient    9970
Absorption 0.1% (=1 g/l)    1.330,   assuming all CYS residues are reduced
Aromaticity:0.068

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 96.98

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[8.47, 13.56, 20.34]

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:6.61019
Grand average of hydropathicity (GRAVY):-2.68