Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4502
Number of amino acids:209
Molecular Weight:20489.28 Da
Theoretical pI:9.17


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3215.31%
Cysteine CYS (C)10.48%
Glutamic Acid GLU (E)52.39%
Aspartic Acid ASP (D)62.87%
Glycine GLY (G)83.83%
Phynylalanine PHE (F)31.44%
Isoleucine ILE (I)31.44%
Histidine HIS (H)20.96%
Lysine LYS (K)115.26%
Methionine MET (M)31.44%
Leucine LEU (L)73.35%
Asparagine ASN (N)31.44%
Glutamine GLN (Q)31.44%
Proline PRO (P)4622.01%
Serine SER (S)3114.83%
Arginine ARG (R)31.44%
Threonine THR (T)199.09%
Tryptophan TRP (W)10.48%
Valine VAL (V)2210.53%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC909
HydrogenH1462
NitrogenN240
OxygenO288
SulphurS4

FormulaC909H1462N240O288S4
Total Number of Atoms:2903


Total number of positively charged residues (ARG + LYS):14
Total number of negatively charged residues (ASP + GLU):11
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)    0.268,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    0.268,   assuming all CYS residues are reduced
Aromaticity:0.019

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 102.02

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[17.22, 42.11, 22.49]

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:64.4976
Grand average of hydropathicity (GRAVY):-0.15