Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4606
Number of amino acids:255
Molecular Weight:27611.4 Da
Theoretical pI:9.2


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)145.49%
Cysteine CYS (C)93.53%
Glutamic Acid GLU (E)31.18%
Aspartic Acid ASP (D)72.75%
Glycine GLY (G)3614.12%
Phynylalanine PHE (F)124.71%
Isoleucine ILE (I)103.92%
Histidine HIS (H)93.53%
Lysine LYS (K)62.35%
Methionine MET (M)72.75%
Leucine LEU (L)187.06%
Asparagine ASN (N)135.1%
Glutamine GLN (Q)114.31%
Proline PRO (P)114.31%
Serine SER (S)239.02%
Arginine ARG (R)135.1%
Threonine THR (T)145.49%
Tryptophan TRP (W)62.35%
Valine VAL (V)218.24%
Tyrosine TYR (Y)124.71%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1229
HydrogenH1864
NitrogenN348
OxygenO349
SulphurS16

FormulaC1229H1864N348O349S16
Total Number of Atoms:3806


Total number of positively charged residues (ARG + LYS):19
Total number of negatively charged residues (ASP + GLU):10
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    51380
Absorption 0.1% (=1 g/l)    1.861,   assuming all pairs of CYS residues form cystines

Ext. coefficient    50880
Absorption 0.1% (=1 g/l)    1.843,   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 : 37.70

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.98, 32.55, 16.47]

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:72.1961
Grand average of hydropathicity (GRAVY):-0.06