Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5169
Number of amino acids:839
Molecular Weight:89355.71 Da
Theoretical pI:6.57


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)323.81%
Cysteine CYS (C)50.6%
Glutamic Acid GLU (E)151.79%
Aspartic Acid ASP (D)40.48%
Glycine GLY (G)16219.31%
Phynylalanine PHE (F)40.48%
Isoleucine ILE (I)40.48%
Histidine HIS (H)50.6%
Lysine LYS (K)80.95%
Methionine MET (M)30.36%
Leucine LEU (L)384.53%
Asparagine ASN (N)00%
Glutamine GLN (Q)29234.8%
Proline PRO (P)10812.87%
Serine SER (S)465.48%
Arginine ARG (R)101.19%
Threonine THR (T)263.1%
Tryptophan TRP (W)91.07%
Valine VAL (V)222.62%
Tyrosine TYR (Y)465.48%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3832
HydrogenH5780
NitrogenN1188
OxygenO1288
SulphurS8

FormulaC3832H5780N1188O1288S8
Total Number of Atoms:12096


Total number of positively charged residues (ARG + LYS):18
Total number of negatively charged residues (ASP + GLU):19
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    118290
Absorption 0.1% (=1 g/l)    1.324,   assuming all pairs of CYS residues form cystines

Ext. coefficient    118040
Absorption 0.1% (=1 g/l)    1.321,   assuming all CYS residues are reduced
Aromaticity:0.070

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 83.27

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[14.66, 37.66, 10.49]

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:30.9416
Grand average of hydropathicity (GRAVY):-1.43