Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5717
Number of amino acids:219
Molecular Weight:24035.05 Da
Theoretical pI:8.36


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)62.74%
Cysteine CYS (C)94.11%
Glutamic Acid GLU (E)62.74%
Aspartic Acid ASP (D)125.48%
Glycine GLY (G)188.22%
Phynylalanine PHE (F)115.02%
Isoleucine ILE (I)177.76%
Histidine HIS (H)00%
Lysine LYS (K)115.02%
Methionine MET (M)31.37%
Leucine LEU (L)2611.87%
Asparagine ASN (N)135.94%
Glutamine GLN (Q)52.28%
Proline PRO (P)177.76%
Serine SER (S)188.22%
Arginine ARG (R)104.57%
Threonine THR (T)104.57%
Tryptophan TRP (W)10.46%
Valine VAL (V)188.22%
Tyrosine TYR (Y)83.65%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1086
HydrogenH1725
NitrogenN279
OxygenO310
SulphurS12

FormulaC1086H1725N279O310S12
Total Number of Atoms:3412


Total number of positively charged residues (ARG + LYS):21
Total number of negatively charged residues (ASP + GLU):18
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    17920
Absorption 0.1% (=1 g/l)    0.746,   assuming all pairs of CYS residues form cystines

Ext. coefficient    17420
Absorption 0.1% (=1 g/l)    0.725,   assuming all CYS residues are reduced
Aromaticity:0.091

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 31.61

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[36.99, 30.14, 18.72]

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:103.151
Grand average of hydropathicity (GRAVY):0.18