Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1286
Number of amino acids:242
Molecular Weight:25486.39 Da
Theoretical pI:8.28


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)156.2%
Cysteine CYS (C)177.02%
Glutamic Acid GLU (E)72.89%
Aspartic Acid ASP (D)104.13%
Glycine GLY (G)2911.98%
Phynylalanine PHE (F)104.13%
Isoleucine ILE (I)83.31%
Histidine HIS (H)31.24%
Lysine LYS (K)145.79%
Methionine MET (M)52.07%
Leucine LEU (L)239.5%
Asparagine ASN (N)145.79%
Glutamine GLN (Q)31.24%
Proline PRO (P)156.2%
Serine SER (S)218.68%
Arginine ARG (R)72.89%
Threonine THR (T)145.79%
Tryptophan TRP (W)31.24%
Valine VAL (V)187.44%
Tyrosine TYR (Y)62.48%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1116
HydrogenH1759
NitrogenN303
OxygenO335
SulphurS22

FormulaC1116H1759N303O335S22
Total Number of Atoms:3535


Total number of positively charged residues (ARG + LYS):21
Total number of negatively charged residues (ASP + GLU):17
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    26440
Absorption 0.1% (=1 g/l)    1.037,   assuming all pairs of CYS residues form cystines

Ext. coefficient    25440
Absorption 0.1% (=1 g/l)    0.998,   assuming all CYS residues are reduced
Aromaticity:0.079

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.84

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.10, 32.64, 20.66]

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:77.7273
Grand average of hydropathicity (GRAVY):0.08