Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1372
Number of amino acids:226
Molecular Weight:24237.31 Da
Theoretical pI:8.58


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)187.96%
Cysteine CYS (C)167.08%
Glutamic Acid GLU (E)10.44%
Aspartic Acid ASP (D)125.31%
Glycine GLY (G)2611.5%
Phynylalanine PHE (F)114.87%
Isoleucine ILE (I)73.1%
Histidine HIS (H)10.44%
Lysine LYS (K)83.54%
Methionine MET (M)31.33%
Leucine LEU (L)135.75%
Asparagine ASN (N)187.96%
Glutamine GLN (Q)104.42%
Proline PRO (P)156.64%
Serine SER (S)125.31%
Arginine ARG (R)114.87%
Threonine THR (T)208.85%
Tryptophan TRP (W)31.33%
Valine VAL (V)114.87%
Tyrosine TYR (Y)104.42%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1052
HydrogenH1610
NitrogenN300
OxygenO323
SulphurS19

FormulaC1052H1610N300O323S19
Total Number of Atoms:3304


Total number of positively charged residues (ARG + LYS):19
Total number of negatively charged residues (ASP + GLU):13
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)    1.337,   assuming all pairs of CYS residues form cystines

Ext. coefficient    31400
Absorption 0.1% (=1 g/l)    1.296,   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 : 31.09

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.34, 31.42, 15.49]

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:56.5929
Grand average of hydropathicity (GRAVY):-0.29