Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5817
Number of amino acids:291
Molecular Weight:32966.83 Da
Theoretical pI:8.49


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)124.12%
Cysteine CYS (C)82.75%
Glutamic Acid GLU (E)31.03%
Aspartic Acid ASP (D)20.69%
Glycine GLY (G)82.75%
Phynylalanine PHE (F)134.47%
Isoleucine ILE (I)206.87%
Histidine HIS (H)41.37%
Lysine LYS (K)41.37%
Methionine MET (M)62.06%
Leucine LEU (L)248.25%
Asparagine ASN (N)41.37%
Glutamine GLN (Q)8830.24%
Proline PRO (P)4415.12%
Serine SER (S)186.19%
Arginine ARG (R)41.37%
Threonine THR (T)93.09%
Tryptophan TRP (W)20.69%
Valine VAL (V)155.15%
Tyrosine TYR (Y)31.03%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1472
HydrogenH2307
NitrogenN409
OxygenO424
SulphurS14

FormulaC1472H2307N409O424S14
Total Number of Atoms:4626


Total number of positively charged residues (ARG + LYS):8
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    15970
Absorption 0.1% (=1 g/l)    0.484,   assuming all pairs of CYS residues form cystines

Ext. coefficient    15470
Absorption 0.1% (=1 g/l)    0.469,   assuming all CYS residues are reduced
Aromaticity:0.062

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 99.42

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.46, 25.43, 15.46]

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:78.0412
Grand average of hydropathicity (GRAVY):-0.52