Physicochemical Properties of Peptide



PPepDB ID:PPepDB_713
Number of amino acids:15
Molecular Weight:1574.73 Da
Theoretical pI:8.22


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)16.67%
Cysteine CYS (C)16.67%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)00%
Glycine GLY (G)320%
Phynylalanine PHE (F)213.33%
Isoleucine ILE (I)00%
Histidine HIS (H)00%
Lysine LYS (K)16.67%
Methionine MET (M)00%
Leucine LEU (L)00%
Asparagine ASN (N)16.67%
Glutamine GLN (Q)16.67%
Proline PRO (P)00%
Serine SER (S)320%
Arginine ARG (R)00%
Threonine THR (T)00%
Tryptophan TRP (W)16.67%
Valine VAL (V)16.67%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC70
HydrogenH99
NitrogenN19
OxygenO21
SulphurS1

FormulaC70H99N19O21S1
Total Number of Atoms:210


Total number of positively charged residues (ARG + LYS):1
Total number of negatively charged residues (ASP + GLU):0
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    3.493,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    3.493,   assuming all CYS residues are reduced
Aromaticity:0.200

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 41.83

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.67, 46.67, 6.67]

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:26
Grand average of hydropathicity (GRAVY):-0.09