Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4707
Number of amino acids:266
Molecular Weight:28987.71 Da
Theoretical pI:6.95


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3914.66%
Cysteine CYS (C)10.38%
Glutamic Acid GLU (E)20.75%
Aspartic Acid ASP (D)10.38%
Glycine GLY (G)41.5%
Phynylalanine PHE (F)103.76%
Isoleucine ILE (I)114.14%
Histidine HIS (H)20.75%
Lysine LYS (K)10.38%
Methionine MET (M)41.5%
Leucine LEU (L)5018.8%
Asparagine ASN (N)134.89%
Glutamine GLN (Q)5319.92%
Proline PRO (P)228.27%
Serine SER (S)176.39%
Arginine ARG (R)20.75%
Threonine THR (T)93.38%
Tryptophan TRP (W)10.38%
Valine VAL (V)166.02%
Tyrosine TYR (Y)83.01%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1325
HydrogenH2110
NitrogenN344
OxygenO373
SulphurS5

FormulaC1325H2110N344O373S5
Total Number of Atoms:4157


Total number of positively charged residues (ARG + LYS):3
Total number of negatively charged residues (ASP + GLU):3
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    17420
Absorption 0.1% (=1 g/l)    0.601,   assuming all pairs of CYS residues form cystines

Ext. coefficient    17420
Absorption 0.1% (=1 g/l)    0.601,   assuming all CYS residues are reduced
Aromaticity:0.071

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 62.40

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[36.09, 21.05, 35.71]

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:121.541
Grand average of hydropathicity (GRAVY):0.32