Physicochemical Properties of Peptide



PPepDB ID:PPepDB_863
Number of amino acids:255
Molecular Weight:27517.18 Da
Theoretical pI:8.37


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)187.06%
Cysteine CYS (C)187.06%
Glutamic Acid GLU (E)72.75%
Aspartic Acid ASP (D)124.71%
Glycine GLY (G)228.63%
Phynylalanine PHE (F)145.49%
Isoleucine ILE (I)93.53%
Histidine HIS (H)31.18%
Lysine LYS (K)166.27%
Methionine MET (M)20.78%
Leucine LEU (L)166.27%
Asparagine ASN (N)155.88%
Glutamine GLN (Q)72.75%
Proline PRO (P)145.49%
Serine SER (S)249.41%
Arginine ARG (R)83.14%
Threonine THR (T)228.63%
Tryptophan TRP (W)31.18%
Valine VAL (V)155.88%
Tyrosine TYR (Y)103.92%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1206
HydrogenH1858
NitrogenN326
OxygenO372
SulphurS20

FormulaC1206H1858N326O372S20
Total Number of Atoms:3782


Total number of positively charged residues (ARG + LYS):24
Total number of negatively charged residues (ASP + GLU):19
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    32525
Absorption 0.1% (=1 g/l)    1.182,   assuming all pairs of CYS residues form cystines

Ext. coefficient    31400
Absorption 0.1% (=1 g/l)    1.141,   assuming all CYS residues are reduced
Aromaticity:0.106

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.03

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.27, 29.41, 16.86]

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:62.3529
Grand average of hydropathicity (GRAVY):-0.19