Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5662
Number of amino acids:255
Molecular Weight:27089.72 Da
Theoretical pI:8.4


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3212.55%
Cysteine CYS (C)93.53%
Glutamic Acid GLU (E)41.57%
Aspartic Acid ASP (D)124.71%
Glycine GLY (G)3714.51%
Phynylalanine PHE (F)114.31%
Isoleucine ILE (I)62.35%
Histidine HIS (H)20.78%
Lysine LYS (K)41.57%
Methionine MET (M)62.35%
Leucine LEU (L)207.84%
Asparagine ASN (N)114.31%
Glutamine GLN (Q)103.92%
Proline PRO (P)114.31%
Serine SER (S)124.71%
Arginine ARG (R)155.88%
Threonine THR (T)166.27%
Tryptophan TRP (W)103.92%
Valine VAL (V)187.06%
Tyrosine TYR (Y)93.53%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1206
HydrogenH1825
NitrogenN339
OxygenO346
SulphurS15

FormulaC1206H1825N339O346S15
Total Number of Atoms:3731


Total number of positively charged residues (ARG + LYS):19
Total number of negatively charged residues (ASP + GLU):16
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    68910
Absorption 0.1% (=1 g/l)    2.544,   assuming all pairs of CYS residues form cystines

Ext. coefficient    68410
Absorption 0.1% (=1 g/l)    2.525,   assuming all CYS residues are reduced
Aromaticity:0.118

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 43.05

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.02, 27.84, 24.31]

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:72.7843
Grand average of hydropathicity (GRAVY):0.03