Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5102
Number of amino acids:459
Molecular Weight:51830.33 Da
Theoretical pI:7.84


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)347.41%
Cysteine CYS (C)51.09%
Glutamic Acid GLU (E)337.19%
Aspartic Acid ASP (D)183.92%
Glycine GLY (G)337.19%
Phynylalanine PHE (F)183.92%
Isoleucine ILE (I)204.36%
Histidine HIS (H)112.4%
Lysine LYS (K)91.96%
Methionine MET (M)153.27%
Leucine LEU (L)357.63%
Asparagine ASN (N)214.58%
Glutamine GLN (Q)388.28%
Proline PRO (P)194.14%
Serine SER (S)367.84%
Arginine ARG (R)439.37%
Threonine THR (T)235.01%
Tryptophan TRP (W)40.87%
Valine VAL (V)326.97%
Tyrosine TYR (Y)122.61%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2246
HydrogenH3560
NitrogenN682
OxygenO692
SulphurS20

FormulaC2246H3560N682O692S20
Total Number of Atoms:7200


Total number of positively charged residues (ARG + LYS):52
Total number of negatively charged residues (ASP + GLU):51
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    40130
Absorption 0.1% (=1 g/l)    0.774,   assuming all pairs of CYS residues form cystines

Ext. coefficient    39880
Absorption 0.1% (=1 g/l)    0.769,   assuming all CYS residues are reduced
Aromaticity:0.074

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 49.27

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.36, 23.75, 25.49]

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:74.3573
Grand average of hydropathicity (GRAVY):-0.54