Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4810
Number of amino acids:324
Molecular Weight:34665.9 Da
Theoretical pI:6.32


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)309.26%
Cysteine CYS (C)175.25%
Glutamic Acid GLU (E)72.16%
Aspartic Acid ASP (D)144.32%
Glycine GLY (G)4112.65%
Phynylalanine PHE (F)154.63%
Isoleucine ILE (I)134.01%
Histidine HIS (H)30.93%
Lysine LYS (K)61.85%
Methionine MET (M)51.54%
Leucine LEU (L)237.1%
Asparagine ASN (N)185.56%
Glutamine GLN (Q)154.63%
Proline PRO (P)237.1%
Serine SER (S)298.95%
Arginine ARG (R)144.32%
Threonine THR (T)144.32%
Tryptophan TRP (W)82.47%
Valine VAL (V)123.7%
Tyrosine TYR (Y)175.25%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1534
HydrogenH2289
NitrogenN419
OxygenO460
SulphurS22

FormulaC1534H2289N419O460S22
Total Number of Atoms:4724


Total number of positively charged residues (ARG + LYS):20
Total number of negatively charged residues (ASP + GLU):21
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    70330
Absorption 0.1% (=1 g/l)    2.029,   assuming all pairs of CYS residues form cystines

Ext. coefficient    69330
Absorption 0.1% (=1 g/l)    2.000,   assuming all CYS residues are reduced
Aromaticity:0.123

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 45.44

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.16, 34.26, 20.06]

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:63.3334
Grand average of hydropathicity (GRAVY):-0.17