Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5105
Number of amino acids:425
Molecular Weight:47000.94 Da
Theoretical pI:8.72


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)286.59%
Cysteine CYS (C)184.24%
Glutamic Acid GLU (E)81.88%
Aspartic Acid ASP (D)204.71%
Glycine GLY (G)296.82%
Phynylalanine PHE (F)133.06%
Isoleucine ILE (I)235.41%
Histidine HIS (H)92.12%
Lysine LYS (K)235.41%
Methionine MET (M)133.06%
Leucine LEU (L)296.82%
Asparagine ASN (N)266.12%
Glutamine GLN (Q)235.41%
Proline PRO (P)296.82%
Serine SER (S)348%
Arginine ARG (R)143.29%
Threonine THR (T)276.35%
Tryptophan TRP (W)122.82%
Valine VAL (V)327.53%
Tyrosine TYR (Y)153.53%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2087
HydrogenH3233
NitrogenN569
OxygenO607
SulphurS31

FormulaC2087H3233N569O607S31
Total Number of Atoms:6527


Total number of positively charged residues (ARG + LYS):37
Total number of negatively charged residues (ASP + GLU):28
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    89475
Absorption 0.1% (=1 g/l)    1.904,   assuming all pairs of CYS residues form cystines

Ext. coefficient    88350
Absorption 0.1% (=1 g/l)    1.880,   assuming all CYS residues are reduced
Aromaticity:0.094

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.24

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.18, 27.76, 18.35]

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:76.1412
Grand average of hydropathicity (GRAVY):-0.19