Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6049
Number of amino acids:136
Molecular Weight:12992.38 Da
Theoretical pI:4.32


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3324.26%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)64.41%
Aspartic Acid ASP (D)75.15%
Glycine GLY (G)75.15%
Phynylalanine PHE (F)53.68%
Isoleucine ILE (I)21.47%
Histidine HIS (H)00%
Lysine LYS (K)64.41%
Methionine MET (M)10.74%
Leucine LEU (L)64.41%
Asparagine ASN (N)10.74%
Glutamine GLN (Q)00%
Proline PRO (P)2014.71%
Serine SER (S)2115.44%
Arginine ARG (R)10.74%
Threonine THR (T)107.35%
Tryptophan TRP (W)00%
Valine VAL (V)96.62%
Tyrosine TYR (Y)10.74%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC572
HydrogenH902
NitrogenN146
OxygenO196
SulphurS1

FormulaC572H902N146O196S1
Total Number of Atoms:1817


Total number of positively charged residues (ARG + LYS):7
Total number of negatively charged residues (ASP + GLU):13
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    1490
Absorption 0.1% (=1 g/l)    0.115
Aromaticity:0.044

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 64.89

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[16.91, 36.03, 33.82]

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:66.3971
Grand average of hydropathicity (GRAVY):0.06