Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1373
Number of amino acids:230
Molecular Weight:24728.94 Da
Theoretical pI:8.13


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)187.83%
Cysteine CYS (C)166.96%
Glutamic Acid GLU (E)10.43%
Aspartic Acid ASP (D)135.65%
Glycine GLY (G)229.57%
Phynylalanine PHE (F)125.22%
Isoleucine ILE (I)62.61%
Histidine HIS (H)10.43%
Lysine LYS (K)31.3%
Methionine MET (M)31.3%
Leucine LEU (L)187.83%
Asparagine ASN (N)187.83%
Glutamine GLN (Q)52.17%
Proline PRO (P)208.7%
Serine SER (S)177.39%
Arginine ARG (R)146.09%
Threonine THR (T)187.83%
Tryptophan TRP (W)31.3%
Valine VAL (V)125.22%
Tyrosine TYR (Y)104.35%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1081
HydrogenH1647
NitrogenN303
OxygenO327
SulphurS19

FormulaC1081H1647N303O327S19
Total Number of Atoms:3377


Total number of positively charged residues (ARG + LYS):17
Total number of negatively charged residues (ASP + GLU):14
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    32400
Absorption 0.1% (=1 g/l)    1.310,   assuming all pairs of CYS residues form cystines

Ext. coefficient    31400
Absorption 0.1% (=1 g/l)    1.270,   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 : 32.95

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.52, 33.48, 17.39]

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:63.6522
Grand average of hydropathicity (GRAVY):-0.14