Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5065
Number of amino acids:280
Molecular Weight:29124.58 Da
Theoretical pI:8.31


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3713.21%
Cysteine CYS (C)165.71%
Glutamic Acid GLU (E)72.5%
Aspartic Acid ASP (D)82.86%
Glycine GLY (G)4716.79%
Phynylalanine PHE (F)145%
Isoleucine ILE (I)113.93%
Histidine HIS (H)51.79%
Lysine LYS (K)82.86%
Methionine MET (M)41.43%
Leucine LEU (L)134.64%
Asparagine ASN (N)248.57%
Glutamine GLN (Q)134.64%
Proline PRO (P)134.64%
Serine SER (S)113.93%
Arginine ARG (R)113.93%
Threonine THR (T)93.21%
Tryptophan TRP (W)41.43%
Valine VAL (V)124.29%
Tyrosine TYR (Y)134.64%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1270
HydrogenH1908
NitrogenN372
OxygenO381
SulphurS20

FormulaC1270H1908N372O381S20
Total Number of Atoms:3951


Total number of positively charged residues (ARG + LYS):19
Total number of negatively charged residues (ASP + GLU):15
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    42370
Absorption 0.1% (=1 g/l)    1.455,   assuming all pairs of CYS residues form cystines

Ext. coefficient    41370
Absorption 0.1% (=1 g/l)    1.420,   assuming all CYS residues are reduced
Aromaticity:0.111

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 29.70

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.93, 33.93, 21.79]

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:59.0714
Grand average of hydropathicity (GRAVY):-0.18