Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4261
Number of amino acids:454
Molecular Weight:50040.9 Da
Theoretical pI:6.68


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)419.03%
Cysteine CYS (C)81.76%
Glutamic Acid GLU (E)235.07%
Aspartic Acid ASP (D)224.85%
Glycine GLY (G)378.15%
Phynylalanine PHE (F)163.52%
Isoleucine ILE (I)286.17%
Histidine HIS (H)122.64%
Lysine LYS (K)296.39%
Methionine MET (M)71.54%
Leucine LEU (L)4610.13%
Asparagine ASN (N)286.17%
Glutamine GLN (Q)204.41%
Proline PRO (P)183.96%
Serine SER (S)327.05%
Arginine ARG (R)143.08%
Threonine THR (T)194.19%
Tryptophan TRP (W)51.1%
Valine VAL (V)265.73%
Tyrosine TYR (Y)235.07%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2243
HydrogenH3488
NitrogenN602
OxygenO667
SulphurS15

FormulaC2243H3488N602O667S15
Total Number of Atoms:7015


Total number of positively charged residues (ARG + LYS):43
Total number of negatively charged residues (ASP + GLU):45
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    62270
Absorption 0.1% (=1 g/l)    1.244,   assuming all pairs of CYS residues form cystines

Ext. coefficient    61770
Absorption 0.1% (=1 g/l)    1.234,   assuming all CYS residues are reduced
Aromaticity:0.097

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.33

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.72, 25.33, 25.77]

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:89.2072
Grand average of hydropathicity (GRAVY):-0.21