Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4581
Number of amino acids:328
Molecular Weight:34889.59 Da
Theoretical pI:8.61


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)278.23%
Cysteine CYS (C)103.05%
Glutamic Acid GLU (E)61.83%
Aspartic Acid ASP (D)175.18%
Glycine GLY (G)3410.37%
Phynylalanine PHE (F)123.66%
Isoleucine ILE (I)175.18%
Histidine HIS (H)41.22%
Lysine LYS (K)20.61%
Methionine MET (M)51.52%
Leucine LEU (L)298.84%
Asparagine ASN (N)206.1%
Glutamine GLN (Q)185.49%
Proline PRO (P)164.88%
Serine SER (S)226.71%
Arginine ARG (R)257.62%
Threonine THR (T)298.84%
Tryptophan TRP (W)30.91%
Valine VAL (V)298.84%
Tyrosine TYR (Y)30.91%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1509
HydrogenH2434
NitrogenN454
OxygenO467
SulphurS15

FormulaC1509H2434N454O467S15
Total Number of Atoms:4879


Total number of positively charged residues (ARG + LYS):27
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    21595
Absorption 0.1% (=1 g/l)    0.619,   assuming all pairs of CYS residues form cystines

Ext. coefficient    20970
Absorption 0.1% (=1 g/l)    0.601,   assuming all CYS residues are reduced
Aromaticity:0.055

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.58

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.35, 28.05, 20.43]

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:88.5671
Grand average of hydropathicity (GRAVY):-0.02