Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5538
Number of amino acids:342
Molecular Weight:37251.86 Da
Theoretical pI:8.73


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)154.39%
Cysteine CYS (C)82.34%
Glutamic Acid GLU (E)30.88%
Aspartic Acid ASP (D)174.97%
Glycine GLY (G)236.73%
Phynylalanine PHE (F)144.09%
Isoleucine ILE (I)226.43%
Histidine HIS (H)51.46%
Lysine LYS (K)154.39%
Methionine MET (M)41.17%
Leucine LEU (L)5415.79%
Asparagine ASN (N)319.06%
Glutamine GLN (Q)133.8%
Proline PRO (P)236.73%
Serine SER (S)339.65%
Arginine ARG (R)102.92%
Threonine THR (T)267.6%
Tryptophan TRP (W)20.58%
Valine VAL (V)144.09%
Tyrosine TYR (Y)102.92%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1669
HydrogenH2659
NitrogenN443
OxygenO496
SulphurS12

FormulaC1669H2659N443O496S12
Total Number of Atoms:5279


Total number of positively charged residues (ARG + LYS):25
Total number of negatively charged residues (ASP + GLU):20
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    26400
Absorption 0.1% (=1 g/l)    0.709,   assuming all pairs of CYS residues form cystines

Ext. coefficient    25900
Absorption 0.1% (=1 g/l)    0.695,   assuming all CYS residues are reduced
Aromaticity:0.076

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.27

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.92, 32.16, 22.22]

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:102.924
Grand average of hydropathicity (GRAVY):0.02