Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4430
Number of amino acids:666
Molecular Weight:78242.97 Da
Theoretical pI:6.13


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)294.35%
Cysteine CYS (C)213.15%
Glutamic Acid GLU (E)7711.56%
Aspartic Acid ASP (D)304.5%
Glycine GLY (G)406.01%
Phynylalanine PHE (F)274.05%
Isoleucine ILE (I)243.6%
Histidine HIS (H)152.25%
Lysine LYS (K)274.05%
Methionine MET (M)111.65%
Leucine LEU (L)487.21%
Asparagine ASN (N)314.65%
Glutamine GLN (Q)6810.21%
Proline PRO (P)274.05%
Serine SER (S)416.16%
Arginine ARG (R)7210.81%
Threonine THR (T)223.3%
Tryptophan TRP (W)20.3%
Valine VAL (V)294.35%
Tyrosine TYR (Y)253.75%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3351
HydrogenH5272
NitrogenN1040
OxygenO1068
SulphurS32

FormulaC3351H5272N1040O1068S32
Total Number of Atoms:10763


Total number of positively charged residues (ARG + LYS):99
Total number of negatively charged residues (ASP + GLU):107
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    49500
Absorption 0.1% (=1 g/l)    0.633,   assuming all pairs of CYS residues form cystines

Ext. coefficient    48250
Absorption 0.1% (=1 g/l)    0.617,   assuming all CYS residues are reduced
Aromaticity:0.081

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 71.78

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.27, 20.87, 24.77]

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:59.1441
Grand average of hydropathicity (GRAVY):-1.09