Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4850
Number of amino acids:431
Molecular Weight:48514.96 Da
Theoretical pI:9.13


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)225.1%
Cysteine CYS (C)184.18%
Glutamic Acid GLU (E)61.39%
Aspartic Acid ASP (D)184.18%
Glycine GLY (G)286.5%
Phynylalanine PHE (F)296.73%
Isoleucine ILE (I)194.41%
Histidine HIS (H)92.09%
Lysine LYS (K)327.42%
Methionine MET (M)112.55%
Leucine LEU (L)317.19%
Asparagine ASN (N)276.26%
Glutamine GLN (Q)194.41%
Proline PRO (P)296.73%
Serine SER (S)286.5%
Arginine ARG (R)92.09%
Threonine THR (T)409.28%
Tryptophan TRP (W)133.02%
Valine VAL (V)276.26%
Tyrosine TYR (Y)163.71%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2208
HydrogenH3337
NitrogenN567
OxygenO610
SulphurS29

FormulaC2208H3337N567O610S29
Total Number of Atoms:6751


Total number of positively charged residues (ARG + LYS):41
Total number of negatively charged residues (ASP + GLU):24
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    96465
Absorption 0.1% (=1 g/l)    1.988,   assuming all pairs of CYS residues form cystines

Ext. coefficient    95340
Absorption 0.1% (=1 g/l)    1.965,   assuming all CYS residues are reduced
Aromaticity:0.135

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.00

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.32, 25.99, 16.24]

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:68.5151
Grand average of hydropathicity (GRAVY):-0.18