Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5318
Number of amino acids:679
Molecular Weight:75719.99 Da
Theoretical pI:6.88


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)487.07%
Cysteine CYS (C)182.65%
Glutamic Acid GLU (E)405.89%
Aspartic Acid ASP (D)365.3%
Glycine GLY (G)527.66%
Phynylalanine PHE (F)426.19%
Isoleucine ILE (I)395.74%
Histidine HIS (H)101.47%
Lysine LYS (K)304.42%
Methionine MET (M)101.47%
Leucine LEU (L)659.57%
Asparagine ASN (N)355.15%
Glutamine GLN (Q)233.39%
Proline PRO (P)253.68%
Serine SER (S)608.84%
Arginine ARG (R)456.63%
Threonine THR (T)355.15%
Tryptophan TRP (W)81.18%
Valine VAL (V)385.6%
Tyrosine TYR (Y)202.95%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3366
HydrogenH5246
NitrogenN930
OxygenO1005
SulphurS28

FormulaC3366H5246N930O1005S28
Total Number of Atoms:10575


Total number of positively charged residues (ARG + LYS):75
Total number of negatively charged residues (ASP + GLU):76
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    74925
Absorption 0.1% (=1 g/l)    0.990,   assuming all pairs of CYS residues form cystines

Ext. coefficient    73800
Absorption 0.1% (=1 g/l)    0.975,   assuming all CYS residues are reduced
Aromaticity:0.103

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.60

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.22, 25.33, 24.01]

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:83.0339
Grand average of hydropathicity (GRAVY):-0.20