Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3410
Number of amino acids:46
Molecular Weight:5297.85 Da
Theoretical pI:6.96


Amino Acid Composition:


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


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC218
HydrogenH320
NitrogenN70
OxygenO70
SulphurS8

FormulaC218H320N70O70S8
Total Number of Atoms:686


Total number of positively charged residues (ARG + LYS):5
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    12990
Absorption 0.1% (=1 g/l)    2.452,   assuming all pairs of CYS residues form cystines

Ext. coefficient    12490
Absorption 0.1% (=1 g/l)    2.358,   assuming all CYS residues are reduced
Aromaticity:0.109

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 53.16

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[13.04, 23.91, 15.22]

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:15
Grand average of hydropathicity (GRAVY):-1.03