Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4737
Number of amino acids:495
Molecular Weight:56046.88 Da
Theoretical pI:9.11


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)357.07%
Cysteine CYS (C)71.41%
Glutamic Acid GLU (E)285.66%
Aspartic Acid ASP (D)112.22%
Glycine GLY (G)326.46%
Phynylalanine PHE (F)295.86%
Isoleucine ILE (I)265.25%
Histidine HIS (H)102.02%
Lysine LYS (K)163.23%
Methionine MET (M)61.21%
Leucine LEU (L)346.87%
Asparagine ASN (N)357.07%
Glutamine GLN (Q)5410.91%
Proline PRO (P)214.24%
Serine SER (S)428.48%
Arginine ARG (R)326.46%
Threonine THR (T)204.04%
Tryptophan TRP (W)40.81%
Valine VAL (V)346.87%
Tyrosine TYR (Y)193.84%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2479
HydrogenH3836
NitrogenN720
OxygenO744
SulphurS13

FormulaC2479H3836N720O744S13
Total Number of Atoms:7792


Total number of positively charged residues (ARG + LYS):48
Total number of negatively charged residues (ASP + GLU):39
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    50685
Absorption 0.1% (=1 g/l)    0.904,   assuming all pairs of CYS residues form cystines

Ext. coefficient    50310
Absorption 0.1% (=1 g/l)    0.898,   assuming all CYS residues are reduced
Aromaticity:0.105

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 51.63

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.49, 26.26, 20.81]

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:74.2627
Grand average of hydropathicity (GRAVY):-0.50