Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1495
Number of amino acids:79
Molecular Weight:8570.41 Da
Theoretical pI:8.6


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)911.39%
Cysteine CYS (C)67.59%
Glutamic Acid GLU (E)11.27%
Aspartic Acid ASP (D)11.27%
Glycine GLY (G)911.39%
Phynylalanine PHE (F)67.59%
Isoleucine ILE (I)22.53%
Histidine HIS (H)22.53%
Lysine LYS (K)33.8%
Methionine MET (M)11.27%
Leucine LEU (L)00%
Asparagine ASN (N)810.13%
Glutamine GLN (Q)56.33%
Proline PRO (P)11.27%
Serine SER (S)911.39%
Arginine ARG (R)22.53%
Threonine THR (T)45.06%
Tryptophan TRP (W)22.53%
Valine VAL (V)33.8%
Tyrosine TYR (Y)56.33%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC372
HydrogenH535
NitrogenN107
OxygenO115
SulphurS7

FormulaC372H535N107O115S7
Total Number of Atoms:1136


Total number of positively charged residues (ARG + LYS):5
Total number of negatively charged residues (ASP + GLU):2
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    18825
Absorption 0.1% (=1 g/l)    2.197,   assuming all pairs of CYS residues form cystines

Ext. coefficient    18450
Absorption 0.1% (=1 g/l)    2.153,   assuming all CYS residues are reduced
Aromaticity:0.165

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 22.74

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[22.78, 34.18, 13.92]

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:32.2785
Grand average of hydropathicity (GRAVY):-0.40