Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4137
Number of amino acids:398
Molecular Weight:44563.85 Da
Theoretical pI:8.53


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)276.78%
Cysteine CYS (C)82.01%
Glutamic Acid GLU (E)164.02%
Aspartic Acid ASP (D)297.29%
Glycine GLY (G)348.54%
Phynylalanine PHE (F)184.52%
Isoleucine ILE (I)369.05%
Histidine HIS (H)123.02%
Lysine LYS (K)235.78%
Methionine MET (M)102.51%
Leucine LEU (L)297.29%
Asparagine ASN (N)215.28%
Glutamine GLN (Q)71.76%
Proline PRO (P)133.27%
Serine SER (S)287.04%
Arginine ARG (R)266.53%
Threonine THR (T)235.78%
Tryptophan TRP (W)82.01%
Valine VAL (V)194.77%
Tyrosine TYR (Y)112.76%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1979
HydrogenH3099
NitrogenN559
OxygenO579
SulphurS18

FormulaC1979H3099N559O579S18
Total Number of Atoms:6234


Total number of positively charged residues (ARG + LYS):49
Total number of negatively charged residues (ASP + GLU):45
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    60890
Absorption 0.1% (=1 g/l)    1.366,   assuming all pairs of CYS residues form cystines

Ext. coefficient    60390
Absorption 0.1% (=1 g/l)    1.355,   assuming all CYS residues are reduced
Aromaticity:0.093

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 31.68

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.40, 24.12, 20.60]

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:84.3216
Grand average of hydropathicity (GRAVY):-0.26