Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1491
Number of amino acids:121
Molecular Weight:12690.85 Da
Theoretical pI:5.39


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)43.31%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)32.48%
Aspartic Acid ASP (D)75.79%
Glycine GLY (G)2218.18%
Phynylalanine PHE (F)64.96%
Isoleucine ILE (I)119.09%
Histidine HIS (H)32.48%
Lysine LYS (K)21.65%
Methionine MET (M)21.65%
Leucine LEU (L)75.79%
Asparagine ASN (N)75.79%
Glutamine GLN (Q)21.65%
Proline PRO (P)32.48%
Serine SER (S)1915.7%
Arginine ARG (R)54.13%
Threonine THR (T)64.96%
Tryptophan TRP (W)00%
Valine VAL (V)43.31%
Tyrosine TYR (Y)86.61%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC557
HydrogenH843
NitrogenN153
OxygenO184
SulphurS2

FormulaC557H843N153O184S2
Total Number of Atoms:1739


Total number of positively charged residues (ARG + LYS):7
Total number of negatively charged residues (ASP + GLU):10
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    11920
Absorption 0.1% (=1 g/l)    0.939
Aromaticity:0.116

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.86

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.75, 42.15, 13.22]

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:70.9091
Grand average of hydropathicity (GRAVY):-0.24