Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4973
Number of amino acids:319
Molecular Weight:34133.54 Da
Theoretical pI:8.81


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)257.84%
Cysteine CYS (C)92.82%
Glutamic Acid GLU (E)61.88%
Aspartic Acid ASP (D)175.33%
Glycine GLY (G)309.4%
Phynylalanine PHE (F)165.02%
Isoleucine ILE (I)154.7%
Histidine HIS (H)61.88%
Lysine LYS (K)51.57%
Methionine MET (M)61.88%
Leucine LEU (L)257.84%
Asparagine ASN (N)226.9%
Glutamine GLN (Q)144.39%
Proline PRO (P)134.08%
Serine SER (S)309.4%
Arginine ARG (R)237.21%
Threonine THR (T)247.52%
Tryptophan TRP (W)20.63%
Valine VAL (V)288.78%
Tyrosine TYR (Y)30.94%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1476
HydrogenH2357
NitrogenN443
OxygenO459
SulphurS15

FormulaC1476H2357N443O459S15
Total Number of Atoms:4750


Total number of positively charged residues (ARG + LYS):28
Total number of negatively charged residues (ASP + GLU):23
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)    0.468,   assuming all pairs of CYS residues form cystines

Ext. coefficient    15470
Absorption 0.1% (=1 g/l)    0.453,   assuming all CYS residues are reduced
Aromaticity:0.066

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.67

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.90, 29.78, 19.44]

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:82.1943
Grand average of hydropathicity (GRAVY):-0.08