Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4892
Number of amino acids:433
Molecular Weight:47028.45 Da
Theoretical pI:6.27


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)286.47%
Cysteine CYS (C)235.31%
Glutamic Acid GLU (E)204.62%
Aspartic Acid ASP (D)194.39%
Glycine GLY (G)163.7%
Phynylalanine PHE (F)153.46%
Isoleucine ILE (I)276.24%
Histidine HIS (H)81.85%
Lysine LYS (K)245.54%
Methionine MET (M)102.31%
Leucine LEU (L)5713.16%
Asparagine ASN (N)255.77%
Glutamine GLN (Q)173.93%
Proline PRO (P)266%
Serine SER (S)5111.78%
Arginine ARG (R)122.77%
Threonine THR (T)286.47%
Tryptophan TRP (W)30.69%
Valine VAL (V)225.08%
Tyrosine TYR (Y)20.46%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2055
HydrogenH3342
NitrogenN554
OxygenO635
SulphurS33

FormulaC2055H3342N554O635S33
Total Number of Atoms:6619


Total number of positively charged residues (ARG + LYS):36
Total number of negatively charged residues (ASP + GLU):39
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    20855
Absorption 0.1% (=1 g/l)    0.443,   assuming all pairs of CYS residues form cystines

Ext. coefficient    19480
Absorption 0.1% (=1 g/l)    0.414,   assuming all CYS residues are reduced
Aromaticity:0.046

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 53.64

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.10, 27.25, 26.56]

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:96.8592
Grand average of hydropathicity (GRAVY):0.07