Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4126
Number of amino acids:464
Molecular Weight:53105.56 Da
Theoretical pI:5.92


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)286.03%
Cysteine CYS (C)71.51%
Glutamic Acid GLU (E)275.82%
Aspartic Acid ASP (D)214.53%
Glycine GLY (G)296.25%
Phynylalanine PHE (F)245.17%
Isoleucine ILE (I)224.74%
Histidine HIS (H)112.37%
Lysine LYS (K)183.88%
Methionine MET (M)102.16%
Leucine LEU (L)388.19%
Asparagine ASN (N)296.25%
Glutamine GLN (Q)183.88%
Proline PRO (P)224.74%
Serine SER (S)439.27%
Arginine ARG (R)234.96%
Threonine THR (T)306.47%
Tryptophan TRP (W)122.59%
Valine VAL (V)234.96%
Tyrosine TYR (Y)296.25%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2393
HydrogenH3578
NitrogenN632
OxygenO710
SulphurS17

FormulaC2393H3578N632O710S17
Total Number of Atoms:7330


Total number of positively charged residues (ARG + LYS):41
Total number of negatively charged residues (ASP + GLU):48
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    109585
Absorption 0.1% (=1 g/l)    2.064,   assuming all pairs of CYS residues form cystines

Ext. coefficient    109210
Absorption 0.1% (=1 g/l)    2.056,   assuming all CYS residues are reduced
Aromaticity:0.140

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 42.35

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.90, 26.51, 22.20]

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:70.8405
Grand average of hydropathicity (GRAVY):-0.43