Physicochemical Properties of Peptide



PPepDB ID:PPepDB_651
Number of amino acids:22
Molecular Weight:2293.67 Da
Theoretical pI:8.27


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)313.64%
Cysteine CYS (C)14.55%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)00%
Glycine GLY (G)29.09%
Phynylalanine PHE (F)14.55%
Isoleucine ILE (I)00%
Histidine HIS (H)00%
Lysine LYS (K)00%
Methionine MET (M)00%
Leucine LEU (L)00%
Asparagine ASN (N)14.55%
Glutamine GLN (Q)00%
Proline PRO (P)29.09%
Serine SER (S)14.55%
Arginine ARG (R)14.55%
Threonine THR (T)29.09%
Tryptophan TRP (W)14.55%
Valine VAL (V)627.27%
Tyrosine TYR (Y)14.55%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC106
HydrogenH161
NitrogenN27
OxygenO28
SulphurS1

FormulaC106H161N27O28S1
Total Number of Atoms:323


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    6990
Absorption 0.1% (=1 g/l)    3.048,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    3.048,   assuming all CYS residues are reduced
Aromaticity:0.136

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 26.87

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[40.91, 27.27, 13.64]

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:92.7272
Grand average of hydropathicity (GRAVY):0.89