Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5202
Number of amino acids:623
Molecular Weight:68991.69 Da
Theoretical pI:5.93


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)365.78%
Cysteine CYS (C)355.62%
Glutamic Acid GLU (E)375.94%
Aspartic Acid ASP (D)426.74%
Glycine GLY (G)579.15%
Phynylalanine PHE (F)203.21%
Isoleucine ILE (I)355.62%
Histidine HIS (H)101.61%
Lysine LYS (K)528.35%
Methionine MET (M)132.09%
Leucine LEU (L)447.06%
Asparagine ASN (N)264.17%
Glutamine GLN (Q)223.53%
Proline PRO (P)264.17%
Serine SER (S)375.94%
Arginine ARG (R)203.21%
Threonine THR (T)386.1%
Tryptophan TRP (W)121.93%
Valine VAL (V)375.94%
Tyrosine TYR (Y)243.85%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3031
HydrogenH4731
NitrogenN815
OxygenO929
SulphurS48

FormulaC3031H4731N815O929S48
Total Number of Atoms:9554


Total number of positively charged residues (ARG + LYS):72
Total number of negatively charged residues (ASP + GLU):79
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    103885
Absorption 0.1% (=1 g/l)    1.506,   assuming all pairs of CYS residues form cystines

Ext. coefficient    101760
Absorption 0.1% (=1 g/l)    1.475,   assuming all CYS residues are reduced
Aromaticity:0.090

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 29.74

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.61, 23.43, 20.87]

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:72.4559
Grand average of hydropathicity (GRAVY):-0.35