Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1404
Number of amino acids:255
Molecular Weight:27159.25 Da
Theoretical pI:8.9


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)218.24%
Cysteine CYS (C)166.27%
Glutamic Acid GLU (E)41.57%
Aspartic Acid ASP (D)103.92%
Glycine GLY (G)259.8%
Phynylalanine PHE (F)103.92%
Isoleucine ILE (I)62.35%
Histidine HIS (H)20.78%
Lysine LYS (K)145.49%
Methionine MET (M)62.35%
Leucine LEU (L)249.41%
Asparagine ASN (N)93.53%
Glutamine GLN (Q)72.75%
Proline PRO (P)176.67%
Serine SER (S)2911.37%
Arginine ARG (R)103.92%
Threonine THR (T)155.88%
Tryptophan TRP (W)31.18%
Valine VAL (V)155.88%
Tyrosine TYR (Y)124.71%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1196
HydrogenH1868
NitrogenN322
OxygenO356
SulphurS22

FormulaC1196H1868N322O356S22
Total Number of Atoms:3764


Total number of positively charged residues (ARG + LYS):24
Total number of negatively charged residues (ASP + GLU):14
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    35380
Absorption 0.1% (=1 g/l)    1.303,   assuming all pairs of CYS residues form cystines

Ext. coefficient    34380
Absorption 0.1% (=1 g/l)    1.266,   assuming all CYS residues are reduced
Aromaticity:0.098

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 51.70

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.45, 31.37, 21.57]

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:71.1764
Grand average of hydropathicity (GRAVY):-0.01