Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4496
Number of amino acids:480
Molecular Weight:53608.04 Da
Theoretical pI:8.04


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)326.67%
Cysteine CYS (C)81.67%
Glutamic Acid GLU (E)214.38%
Aspartic Acid ASP (D)234.79%
Glycine GLY (G)357.29%
Phynylalanine PHE (F)255.21%
Isoleucine ILE (I)255.21%
Histidine HIS (H)112.29%
Lysine LYS (K)306.25%
Methionine MET (M)91.88%
Leucine LEU (L)418.54%
Asparagine ASN (N)255.21%
Glutamine GLN (Q)142.92%
Proline PRO (P)296.04%
Serine SER (S)469.58%
Arginine ARG (R)163.33%
Threonine THR (T)234.79%
Tryptophan TRP (W)122.5%
Valine VAL (V)326.67%
Tyrosine TYR (Y)234.79%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2439
HydrogenH3701
NitrogenN631
OxygenO700
SulphurS17

FormulaC2439H3701N631O700S17
Total Number of Atoms:7488


Total number of positively charged residues (ARG + LYS):46
Total number of negatively charged residues (ASP + GLU):44
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    100770
Absorption 0.1% (=1 g/l)    1.880,   assuming all pairs of CYS residues form cystines

Ext. coefficient    100270
Absorption 0.1% (=1 g/l)    1.870,   assuming all CYS residues are reduced
Aromaticity:0.125

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 48.49

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.92, 28.12, 21.46]

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:79.625
Grand average of hydropathicity (GRAVY):-0.21