Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4328
Number of amino acids:421
Molecular Weight:48416.3 Da
Theoretical pI:4.4


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)235.46%
Cysteine CYS (C)30.71%
Glutamic Acid GLU (E)5212.35%
Aspartic Acid ASP (D)4711.16%
Glycine GLY (G)225.23%
Phynylalanine PHE (F)163.8%
Isoleucine ILE (I)235.46%
Histidine HIS (H)40.95%
Lysine LYS (K)4811.4%
Methionine MET (M)20.48%
Leucine LEU (L)307.13%
Asparagine ASN (N)194.51%
Glutamine GLN (Q)112.61%
Proline PRO (P)286.65%
Serine SER (S)255.94%
Arginine ARG (R)51.19%
Threonine THR (T)204.75%
Tryptophan TRP (W)133.09%
Valine VAL (V)133.09%
Tyrosine TYR (Y)174.04%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2171
HydrogenH3269
NitrogenN535
OxygenO712
SulphurS5

FormulaC2171H3269N535O712S5
Total Number of Atoms:6692


Total number of positively charged residues (ARG + LYS):53
Total number of negatively charged residues (ASP + GLU):99
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    96955
Absorption 0.1% (=1 g/l)    2.003,   assuming all pairs of CYS residues form cystines

Ext. coefficient    96830
Absorption 0.1% (=1 g/l)    2.000,   assuming all CYS residues are reduced
Aromaticity:0.109

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.08

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.60, 22.33, 25.42]

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:63.5154
Grand average of hydropathicity (GRAVY):-1.01