Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3018
Number of amino acids:46
Molecular Weight:5195.79 Da
Theoretical pI:6.42


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)36.52%
Cysteine CYS (C)817.39%
Glutamic Acid GLU (E)12.17%
Aspartic Acid ASP (D)48.7%
Glycine GLY (G)24.35%
Phynylalanine PHE (F)24.35%
Isoleucine ILE (I)12.17%
Histidine HIS (H)48.7%
Lysine LYS (K)36.52%
Methionine MET (M)00%
Leucine LEU (L)24.35%
Asparagine ASN (N)48.7%
Glutamine GLN (Q)12.17%
Proline PRO (P)00%
Serine SER (S)24.35%
Arginine ARG (R)12.17%
Threonine THR (T)510.87%
Tryptophan TRP (W)12.17%
Valine VAL (V)12.17%
Tyrosine TYR (Y)12.17%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC214
HydrogenH322
NitrogenN66
OxygenO70
SulphurS8

FormulaC214H322N66O70S8
Total Number of Atoms:680


Total number of positively charged residues (ARG + LYS):4
Total number of negatively charged residues (ASP + GLU):5
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)    1.442,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    1.345,   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 : 17.04

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[17.39, 17.39, 13.04]

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:38.2609
Grand average of hydropathicity (GRAVY):-0.54