Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4479
Number of amino acids:436
Molecular Weight:49350.15 Da
Theoretical pI:5.84


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)173.9%
Cysteine CYS (C)102.29%
Glutamic Acid GLU (E)276.19%
Aspartic Acid ASP (D)204.59%
Glycine GLY (G)337.57%
Phynylalanine PHE (F)184.13%
Isoleucine ILE (I)306.88%
Histidine HIS (H)81.83%
Lysine LYS (K)265.96%
Methionine MET (M)40.92%
Leucine LEU (L)409.17%
Asparagine ASN (N)214.82%
Glutamine GLN (Q)122.75%
Proline PRO (P)245.5%
Serine SER (S)398.94%
Arginine ARG (R)153.44%
Threonine THR (T)235.28%
Tryptophan TRP (W)102.29%
Valine VAL (V)306.88%
Tyrosine TYR (Y)296.65%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2252
HydrogenH3418
NitrogenN566
OxygenO655
SulphurS14

FormulaC2252H3418N566O655S14
Total Number of Atoms:6905


Total number of positively charged residues (ARG + LYS):41
Total number of negatively charged residues (ASP + GLU):47
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    98835
Absorption 0.1% (=1 g/l)    2.003,   assuming all pairs of CYS residues form cystines

Ext. coefficient    98210
Absorption 0.1% (=1 g/l)    1.990,   assuming all CYS residues are reduced
Aromaticity:0.131

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.34

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[36.01, 26.83, 20.18]

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:86.4679
Grand average of hydropathicity (GRAVY):-0.21