Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5532
Number of amino acids:196
Molecular Weight:20053.55 Da
Theoretical pI:4.68


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2512.76%
Cysteine CYS (C)31.53%
Glutamic Acid GLU (E)94.59%
Aspartic Acid ASP (D)94.59%
Glycine GLY (G)2311.73%
Phynylalanine PHE (F)147.14%
Isoleucine ILE (I)42.04%
Histidine HIS (H)31.53%
Lysine LYS (K)63.06%
Methionine MET (M)42.04%
Leucine LEU (L)84.08%
Asparagine ASN (N)31.53%
Glutamine GLN (Q)21.02%
Proline PRO (P)147.14%
Serine SER (S)115.61%
Arginine ARG (R)42.04%
Threonine THR (T)2814.29%
Tryptophan TRP (W)21.02%
Valine VAL (V)2110.71%
Tyrosine TYR (Y)31.53%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC898
HydrogenH1373
NitrogenN227
OxygenO280
SulphurS7

FormulaC898H1373N227O280S7
Total Number of Atoms:2785


Total number of positively charged residues (ARG + LYS):10
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    15595
Absorption 0.1% (=1 g/l)    0.778,   assuming all pairs of CYS residues form cystines

Ext. coefficient    15470
Absorption 0.1% (=1 g/l)    0.771,   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 : 21.43

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.53, 26.02, 23.47]

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:67.7041
Grand average of hydropathicity (GRAVY):0.20