Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4656
Number of amino acids:661
Molecular Weight:73864 Da
Theoretical pI:5.14


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)395.9%
Cysteine CYS (C)30.45%
Glutamic Acid GLU (E)274.08%
Aspartic Acid ASP (D)548.17%
Glycine GLY (G)466.96%
Phynylalanine PHE (F)253.78%
Isoleucine ILE (I)314.69%
Histidine HIS (H)131.97%
Lysine LYS (K)324.84%
Methionine MET (M)121.82%
Leucine LEU (L)578.62%
Asparagine ASN (N)284.24%
Glutamine GLN (Q)203.03%
Proline PRO (P)456.81%
Serine SER (S)619.23%
Arginine ARG (R)294.39%
Threonine THR (T)426.35%
Tryptophan TRP (W)192.87%
Valine VAL (V)497.41%
Tyrosine TYR (Y)294.39%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3329
HydrogenH5067
NitrogenN873
OxygenO1004
SulphurS15

FormulaC3329H5067N873O1004S15
Total Number of Atoms:10288


Total number of positively charged residues (ARG + LYS):61
Total number of negatively charged residues (ASP + GLU):81
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    147835
Absorption 0.1% (=1 g/l)    2.001,   assuming all pairs of CYS residues form cystines

Ext. coefficient    147710
Absorption 0.1% (=1 g/l)    2.000,   assuming all CYS residues are reduced
Aromaticity:0.110

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 31.79

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.77, 27.23, 20.42]

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:79.3192
Grand average of hydropathicity (GRAVY):-0.36