Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5937
Number of amino acids:76
Molecular Weight:8519.07 Da
Theoretical pI:7.7


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)33.95%
Cysteine CYS (C)810.53%
Glutamic Acid GLU (E)33.95%
Aspartic Acid ASP (D)33.95%
Glycine GLY (G)67.89%
Phynylalanine PHE (F)45.26%
Isoleucine ILE (I)79.21%
Histidine HIS (H)11.32%
Lysine LYS (K)56.58%
Methionine MET (M)56.58%
Leucine LEU (L)45.26%
Asparagine ASN (N)45.26%
Glutamine GLN (Q)56.58%
Proline PRO (P)11.32%
Serine SER (S)33.95%
Arginine ARG (R)22.63%
Threonine THR (T)67.89%
Tryptophan TRP (W)11.32%
Valine VAL (V)45.26%
Tyrosine TYR (Y)11.32%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC366
HydrogenH587
NitrogenN99
OxygenO108
SulphurS13

FormulaC366H587N99O108S13
Total Number of Atoms:1173


Total number of positively charged residues (ARG + LYS):7
Total number of negatively charged residues (ASP + GLU):6
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    7490
Absorption 0.1% (=1 g/l)    0.879,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    0.821,   assuming all CYS residues are reduced
Aromaticity:0.079

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.87

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.63, 18.42, 19.74]

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:75.6579
Grand average of hydropathicity (GRAVY):0.17