Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4220
Number of amino acids:757
Molecular Weight:79415.37 Da
Theoretical pI:5.92


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)739.64%
Cysteine CYS (C)121.59%
Glutamic Acid GLU (E)293.83%
Aspartic Acid ASP (D)395.15%
Glycine GLY (G)7610.04%
Phynylalanine PHE (F)263.43%
Isoleucine ILE (I)364.76%
Histidine HIS (H)162.11%
Lysine LYS (K)324.23%
Methionine MET (M)141.85%
Leucine LEU (L)597.79%
Asparagine ASN (N)303.96%
Glutamine GLN (Q)60.79%
Proline PRO (P)415.42%
Serine SER (S)9112.02%
Arginine ARG (R)263.43%
Threonine THR (T)597.79%
Tryptophan TRP (W)91.19%
Valine VAL (V)577.53%
Tyrosine TYR (Y)263.43%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3508
HydrogenH5486
NitrogenN944
OxygenO1106
SulphurS26

FormulaC3508H5486N944O1106S26
Total Number of Atoms:11070


Total number of positively charged residues (ARG + LYS):58
Total number of negatively charged residues (ASP + GLU):68
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    88990
Absorption 0.1% (=1 g/l)    1.121,   assuming all pairs of CYS residues form cystines

Ext. coefficient    88240
Absorption 0.1% (=1 g/l)    1.111,   assuming all CYS residues are reduced
Aromaticity:0.081

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.25

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.14, 31.44, 23.12]

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:80.4227
Grand average of hydropathicity (GRAVY):-0.03