Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1190
Number of amino acids:255
Molecular Weight:26809.49 Da
Theoretical pI:5.02


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)239.02%
Cysteine CYS (C)166.27%
Glutamic Acid GLU (E)93.53%
Aspartic Acid ASP (D)124.71%
Glycine GLY (G)3112.16%
Phynylalanine PHE (F)135.1%
Isoleucine ILE (I)124.71%
Histidine HIS (H)10.39%
Lysine LYS (K)72.75%
Methionine MET (M)51.96%
Leucine LEU (L)176.67%
Asparagine ASN (N)93.53%
Glutamine GLN (Q)51.96%
Proline PRO (P)166.27%
Serine SER (S)218.24%
Arginine ARG (R)103.92%
Threonine THR (T)197.45%
Tryptophan TRP (W)31.18%
Valine VAL (V)166.27%
Tyrosine TYR (Y)103.92%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1179
HydrogenH1813
NitrogenN311
OxygenO362
SulphurS21

FormulaC1179H1813N311O362S21
Total Number of Atoms:3686


Total number of positively charged residues (ARG + LYS):17
Total number of negatively charged residues (ASP + GLU):21
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)    1.209,   assuming all pairs of CYS residues form cystines

Ext. coefficient    31400
Absorption 0.1% (=1 g/l)    1.171,   assuming all CYS residues are reduced
Aromaticity:0.102

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.78

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.84, 30.20, 21.18]

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:71.5686
Grand average of hydropathicity (GRAVY):0.12