Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5403
Number of amino acids:454
Molecular Weight:50954.36 Da
Theoretical pI:6.39


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)183.96%
Cysteine CYS (C)194.19%
Glutamic Acid GLU (E)194.19%
Aspartic Acid ASP (D)224.85%
Glycine GLY (G)255.51%
Phynylalanine PHE (F)214.63%
Isoleucine ILE (I)183.96%
Histidine HIS (H)173.74%
Lysine LYS (K)224.85%
Methionine MET (M)153.3%
Leucine LEU (L)408.81%
Asparagine ASN (N)265.73%
Glutamine GLN (Q)173.74%
Proline PRO (P)296.39%
Serine SER (S)4610.13%
Arginine ARG (R)143.08%
Threonine THR (T)224.85%
Tryptophan TRP (W)112.42%
Valine VAL (V)408.81%
Tyrosine TYR (Y)132.86%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2272
HydrogenH3484
NitrogenN606
OxygenO661
SulphurS34

FormulaC2272H3484N606O661S34
Total Number of Atoms:7057


Total number of positively charged residues (ARG + LYS):36
Total number of negatively charged residues (ASP + GLU):41
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    80995
Absorption 0.1% (=1 g/l)    1.590,   assuming all pairs of CYS residues form cystines

Ext. coefficient    79870
Absorption 0.1% (=1 g/l)    1.567,   assuming all CYS residues are reduced
Aromaticity:0.099

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.03

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.50, 27.75, 20.26]

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:79.3392
Grand average of hydropathicity (GRAVY):-0.14