Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4638
Number of amino acids:265
Molecular Weight:28642.68 Da
Theoretical pI:8.49


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2910.94%
Cysteine CYS (C)103.77%
Glutamic Acid GLU (E)62.26%
Aspartic Acid ASP (D)155.66%
Glycine GLY (G)228.3%
Phynylalanine PHE (F)103.77%
Isoleucine ILE (I)114.15%
Histidine HIS (H)51.89%
Lysine LYS (K)145.28%
Methionine MET (M)62.26%
Leucine LEU (L)207.55%
Asparagine ASN (N)103.77%
Glutamine GLN (Q)114.15%
Proline PRO (P)83.02%
Serine SER (S)269.81%
Arginine ARG (R)114.15%
Threonine THR (T)124.53%
Tryptophan TRP (W)51.89%
Valine VAL (V)238.68%
Tyrosine TYR (Y)114.15%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1267
HydrogenH1974
NitrogenN348
OxygenO378
SulphurS16

FormulaC1267H1974N348O378S16
Total Number of Atoms:3983


Total number of positively charged residues (ARG + LYS):25
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    44515
Absorption 0.1% (=1 g/l)    1.554,   assuming all pairs of CYS residues form cystines

Ext. coefficient    43890
Absorption 0.1% (=1 g/l)    1.532,   assuming all CYS residues are reduced
Aromaticity:0.098

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 42.44

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.19, 24.91, 23.02]

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:81.7359
Grand average of hydropathicity (GRAVY):0.01