Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4544
Number of amino acids:297
Molecular Weight:34238.6 Da
Theoretical pI:8.52


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)124.04%
Cysteine CYS (C)72.36%
Glutamic Acid GLU (E)41.35%
Aspartic Acid ASP (D)10.34%
Glycine GLY (G)72.36%
Phynylalanine PHE (F)113.7%
Isoleucine ILE (I)165.39%
Histidine HIS (H)51.68%
Lysine LYS (K)20.67%
Methionine MET (M)31.01%
Leucine LEU (L)217.07%
Asparagine ASN (N)62.02%
Glutamine GLN (Q)10234.34%
Proline PRO (P)4314.48%
Serine SER (S)165.39%
Arginine ARG (R)62.02%
Threonine THR (T)82.69%
Tryptophan TRP (W)10.34%
Valine VAL (V)165.39%
Tyrosine TYR (Y)103.37%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1519
HydrogenH2348
NitrogenN436
OxygenO450
SulphurS10

FormulaC1519H2348N436O450S10
Total Number of Atoms:4763


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    20775
Absorption 0.1% (=1 g/l)    0.607,   assuming all pairs of CYS residues form cystines

Ext. coefficient    20400
Absorption 0.1% (=1 g/l)    0.596,   assuming all CYS residues are reduced
Aromaticity:0.074

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 112.31

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.25, 24.24, 13.47]

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:68.2492
Grand average of hydropathicity (GRAVY):-0.86