Physicochemical Properties of Peptide



PPepDB ID:PPepDB_647
Number of amino acids:23
Molecular Weight:2290.62 Da
Theoretical pI:8.27


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)313.04%
Cysteine CYS (C)14.35%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)00%
Glycine GLY (G)417.39%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)14.35%
Histidine HIS (H)00%
Lysine LYS (K)00%
Methionine MET (M)00%
Leucine LEU (L)14.35%
Asparagine ASN (N)14.35%
Glutamine GLN (Q)00%
Proline PRO (P)28.7%
Serine SER (S)14.35%
Arginine ARG (R)14.35%
Threonine THR (T)313.04%
Tryptophan TRP (W)14.35%
Valine VAL (V)313.04%
Tyrosine TYR (Y)14.35%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC102
HydrogenH160
NitrogenN28
OxygenO30
SulphurS1

FormulaC102H160N28O30S1
Total Number of Atoms:321


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)    3.052,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    3.052,   assuming all CYS residues are reduced
Aromaticity:0.087

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 17.60

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.43, 34.78, 17.39]

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:84.7827
Grand average of hydropathicity (GRAVY):0.47