Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4252
Number of amino acids:761
Molecular Weight:84670.28 Da
Theoretical pI:5.66


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)324.2%
Cysteine CYS (C)293.81%
Glutamic Acid GLU (E)506.57%
Aspartic Acid ASP (D)455.91%
Glycine GLY (G)597.75%
Phynylalanine PHE (F)334.34%
Isoleucine ILE (I)425.52%
Histidine HIS (H)91.18%
Lysine LYS (K)476.18%
Methionine MET (M)172.23%
Leucine LEU (L)547.1%
Asparagine ASN (N)435.65%
Glutamine GLN (Q)273.55%
Proline PRO (P)354.6%
Serine SER (S)648.41%
Arginine ARG (R)384.99%
Threonine THR (T)364.73%
Tryptophan TRP (W)60.79%
Valine VAL (V)688.94%
Tyrosine TYR (Y)273.55%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3720
HydrogenH5854
NitrogenN1016
OxygenO1149
SulphurS46

FormulaC3720H5854N1016O1149S46
Total Number of Atoms:11785


Total number of positively charged residues (ARG + LYS):85
Total number of negatively charged residues (ASP + GLU):95
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    74980
Absorption 0.1% (=1 g/l)    0.886,   assuming all pairs of CYS residues form cystines

Ext. coefficient    73230
Absorption 0.1% (=1 g/l)    0.865,   assuming all CYS residues are reduced
Aromaticity:0.087

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.72

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.22, 26.41, 20.11]

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:79.3167
Grand average of hydropathicity (GRAVY):-0.29