Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4551
Number of amino acids:432
Molecular Weight:46874.91 Da
Theoretical pI:9.27


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)4510.42%
Cysteine CYS (C)20.46%
Glutamic Acid GLU (E)153.47%
Aspartic Acid ASP (D)235.32%
Glycine GLY (G)5512.73%
Phynylalanine PHE (F)194.4%
Isoleucine ILE (I)153.47%
Histidine HIS (H)92.08%
Lysine LYS (K)184.17%
Methionine MET (M)71.62%
Leucine LEU (L)388.8%
Asparagine ASN (N)194.4%
Glutamine GLN (Q)184.17%
Proline PRO (P)153.47%
Serine SER (S)266.02%
Arginine ARG (R)286.48%
Threonine THR (T)214.86%
Tryptophan TRP (W)92.08%
Valine VAL (V)327.41%
Tyrosine TYR (Y)184.17%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2096
HydrogenH3234
NitrogenN598
OxygenO611
SulphurS9

FormulaC2096H3234N598O611S9
Total Number of Atoms:6548


Total number of positively charged residues (ARG + LYS):46
Total number of negatively charged residues (ASP + GLU):38
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    76445
Absorption 0.1% (=1 g/l)    1.631,   assuming all pairs of CYS residues form cystines

Ext. coefficient    76320
Absorption 0.1% (=1 g/l)    1.628,   assuming all CYS residues are reduced
Aromaticity:0.106

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 25.72

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.32, 26.62, 24.31]

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:79.7454
Grand average of hydropathicity (GRAVY):-0.23