Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4929
Number of amino acids:293
Molecular Weight:33422.45 Da
Theoretical pI:8.86


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)124.1%
Cysteine CYS (C)82.73%
Glutamic Acid GLU (E)51.71%
Aspartic Acid ASP (D)00%
Glycine GLY (G)82.73%
Phynylalanine PHE (F)155.12%
Isoleucine ILE (I)155.12%
Histidine HIS (H)41.37%
Lysine LYS (K)31.02%
Methionine MET (M)41.37%
Leucine LEU (L)258.53%
Asparagine ASN (N)20.68%
Glutamine GLN (Q)8328.33%
Proline PRO (P)5318.09%
Serine SER (S)144.78%
Arginine ARG (R)72.39%
Threonine THR (T)93.07%
Tryptophan TRP (W)20.68%
Valine VAL (V)175.8%
Tyrosine TYR (Y)72.39%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1516
HydrogenH2336
NitrogenN412
OxygenO419
SulphurS12

FormulaC1516H2336N412O419S12
Total Number of Atoms:4695


Total number of positively charged residues (ARG + LYS):10
Total number of negatively charged residues (ASP + GLU):5
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    21930
Absorption 0.1% (=1 g/l)    0.656,   assuming all pairs of CYS residues form cystines

Ext. coefficient    21430
Absorption 0.1% (=1 g/l)    0.641,   assuming all CYS residues are reduced
Aromaticity:0.082

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 107.47

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.65, 26.28, 15.70]

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:74.1638
Grand average of hydropathicity (GRAVY):-0.55