Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5314
Number of amino acids:516
Molecular Weight:58709.38 Da
Theoretical pI:8.21


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)336.4%
Cysteine CYS (C)71.36%
Glutamic Acid GLU (E)479.11%
Aspartic Acid ASP (D)173.29%
Glycine GLY (G)468.91%
Phynylalanine PHE (F)244.65%
Isoleucine ILE (I)214.07%
Histidine HIS (H)152.91%
Lysine LYS (K)142.71%
Methionine MET (M)71.36%
Leucine LEU (L)377.17%
Asparagine ASN (N)316.01%
Glutamine GLN (Q)509.69%
Proline PRO (P)224.26%
Serine SER (S)336.4%
Arginine ARG (R)5210.08%
Threonine THR (T)142.71%
Tryptophan TRP (W)71.36%
Valine VAL (V)326.2%
Tyrosine TYR (Y)71.36%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2539
HydrogenH3992
NitrogenN804
OxygenO780
SulphurS14

FormulaC2539H3992N804O780S14
Total Number of Atoms:8129


Total number of positively charged residues (ARG + LYS):66
Total number of negatively charged residues (ASP + GLU):64
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    49305
Absorption 0.1% (=1 g/l)    0.840,   assuming all pairs of CYS residues form cystines

Ext. coefficient    48930
Absorption 0.1% (=1 g/l)    0.833,   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 : 53.64

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.81, 25.58, 24.03]

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:68.2171
Grand average of hydropathicity (GRAVY):-0.82