Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4814
Number of amino acids:362
Molecular Weight:40290.27 Da
Theoretical pI:4.77


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)215.8%
Cysteine CYS (C)71.93%
Glutamic Acid GLU (E)287.73%
Aspartic Acid ASP (D)267.18%
Glycine GLY (G)318.56%
Phynylalanine PHE (F)143.87%
Isoleucine ILE (I)205.52%
Histidine HIS (H)30.83%
Lysine LYS (K)205.52%
Methionine MET (M)82.21%
Leucine LEU (L)277.46%
Asparagine ASN (N)226.08%
Glutamine GLN (Q)92.49%
Proline PRO (P)102.76%
Serine SER (S)287.73%
Arginine ARG (R)184.97%
Threonine THR (T)184.97%
Tryptophan TRP (W)61.66%
Valine VAL (V)328.84%
Tyrosine TYR (Y)143.87%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1775
HydrogenH2767
NitrogenN479
OxygenO562
SulphurS15

FormulaC1775H2767N479O562S15
Total Number of Atoms:5598


Total number of positively charged residues (ARG + LYS):38
Total number of negatively charged residues (ASP + GLU):54
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    54235
Absorption 0.1% (=1 g/l)    1.346,   assuming all pairs of CYS residues form cystines

Ext. coefficient    53860
Absorption 0.1% (=1 g/l)    1.337,   assuming all CYS residues are reduced
Aromaticity:0.094

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.07

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.22, 25.14, 23.20]

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:82.0718
Grand average of hydropathicity (GRAVY):-0.32