Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4524
Number of amino acids:439
Molecular Weight:49305.1 Da
Theoretical pI:6.63


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)255.69%
Cysteine CYS (C)214.78%
Glutamic Acid GLU (E)173.87%
Aspartic Acid ASP (D)204.56%
Glycine GLY (G)306.83%
Phynylalanine PHE (F)204.56%
Isoleucine ILE (I)204.56%
Histidine HIS (H)112.51%
Lysine LYS (K)92.05%
Methionine MET (M)122.73%
Leucine LEU (L)286.38%
Asparagine ASN (N)235.24%
Glutamine GLN (Q)214.78%
Proline PRO (P)337.52%
Serine SER (S)347.74%
Arginine ARG (R)265.92%
Threonine THR (T)255.69%
Tryptophan TRP (W)112.51%
Valine VAL (V)357.97%
Tyrosine TYR (Y)184.1%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2189
HydrogenH3323
NitrogenN603
OxygenO635
SulphurS33

FormulaC2189H3323N603O635S33
Total Number of Atoms:6783


Total number of positively charged residues (ARG + LYS):35
Total number of negatively charged residues (ASP + GLU):37
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    88570
Absorption 0.1% (=1 g/l)    1.796,   assuming all pairs of CYS residues form cystines

Ext. coefficient    87320
Absorption 0.1% (=1 g/l)    1.771,   assuming all CYS residues are reduced
Aromaticity:0.112

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 46.59

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.07, 27.33, 18.68]

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:71.4579
Grand average of hydropathicity (GRAVY):-0.21