Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6039
Number of amino acids:77
Molecular Weight:8532.01 Da
Theoretical pI:8.68


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)33.9%
Cysteine CYS (C)810.39%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)56.49%
Glycine GLY (G)56.49%
Phynylalanine PHE (F)22.6%
Isoleucine ILE (I)67.79%
Histidine HIS (H)11.3%
Lysine LYS (K)67.79%
Methionine MET (M)22.6%
Leucine LEU (L)56.49%
Asparagine ASN (N)45.19%
Glutamine GLN (Q)11.3%
Proline PRO (P)33.9%
Serine SER (S)67.79%
Arginine ARG (R)33.9%
Threonine THR (T)67.79%
Tryptophan TRP (W)11.3%
Valine VAL (V)67.79%
Tyrosine TYR (Y)45.19%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC372
HydrogenH594
NitrogenN100
OxygenO109
SulphurS10

FormulaC372H594N100O109S10
Total Number of Atoms:1185


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):5
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    11960
Absorption 0.1% (=1 g/l)    1.402,   assuming all pairs of CYS residues form cystines

Ext. coefficient    11460
Absorption 0.1% (=1 g/l)    1.343,   assuming all CYS residues are reduced
Aromaticity:0.091

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 18.15

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.17, 23.38, 12.99]

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:82.2078
Grand average of hydropathicity (GRAVY):0.12