Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4532
Number of amino acids:494
Molecular Weight:54335.95 Da
Theoretical pI:5.56


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)377.49%
Cysteine CYS (C)81.62%
Glutamic Acid GLU (E)265.26%
Aspartic Acid ASP (D)316.28%
Glycine GLY (G)438.7%
Phynylalanine PHE (F)163.24%
Isoleucine ILE (I)193.85%
Histidine HIS (H)142.83%
Lysine LYS (K)234.66%
Methionine MET (M)122.43%
Leucine LEU (L)408.1%
Asparagine ASN (N)295.87%
Glutamine GLN (Q)173.44%
Proline PRO (P)265.26%
Serine SER (S)418.3%
Arginine ARG (R)214.25%
Threonine THR (T)234.66%
Tryptophan TRP (W)71.42%
Valine VAL (V)387.69%
Tyrosine TYR (Y)234.66%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2401
HydrogenH3697
NitrogenN661
OxygenO742
SulphurS20

FormulaC2401H3697N661O742S20
Total Number of Atoms:7521


Total number of positively charged residues (ARG + LYS):44
Total number of negatively charged residues (ASP + GLU):57
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    73270
Absorption 0.1% (=1 g/l)    1.348,   assuming all pairs of CYS residues form cystines

Ext. coefficient    72770
Absorption 0.1% (=1 g/l)    1.339,   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 : 45.06

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.95, 28.14, 23.28]

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:76.3765
Grand average of hydropathicity (GRAVY):-0.37