Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4442
Number of amino acids:445
Molecular Weight:48696.03 Da
Theoretical pI:5.25


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)4610.34%
Cysteine CYS (C)40.9%
Glutamic Acid GLU (E)143.15%
Aspartic Acid ASP (D)388.54%
Glycine GLY (G)4710.56%
Phynylalanine PHE (F)153.37%
Isoleucine ILE (I)235.17%
Histidine HIS (H)143.15%
Lysine LYS (K)173.82%
Methionine MET (M)132.92%
Leucine LEU (L)388.54%
Asparagine ASN (N)112.47%
Glutamine GLN (Q)153.37%
Proline PRO (P)184.04%
Serine SER (S)286.29%
Arginine ARG (R)194.27%
Threonine THR (T)224.94%
Tryptophan TRP (W)163.6%
Valine VAL (V)316.97%
Tyrosine TYR (Y)163.6%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2188
HydrogenH3323
NitrogenN589
OxygenO642
SulphurS17

FormulaC2188H3323N589O642S17
Total Number of Atoms:6759


Total number of positively charged residues (ARG + LYS):36
Total number of negatively charged residues (ASP + GLU):52
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    112090
Absorption 0.1% (=1 g/l)    2.302,   assuming all pairs of CYS residues form cystines

Ext. coefficient    111840
Absorption 0.1% (=1 g/l)    2.297,   assuming all CYS residues are reduced
Aromaticity:0.106

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 22.96

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.24, 23.37, 24.94]

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:84
Grand average of hydropathicity (GRAVY):-0.12