Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4956
Number of amino acids:497
Molecular Weight:55495.02 Da
Theoretical pI:5.03


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)367.24%
Cysteine CYS (C)61.21%
Glutamic Acid GLU (E)244.83%
Aspartic Acid ASP (D)326.44%
Glycine GLY (G)377.44%
Phynylalanine PHE (F)306.04%
Isoleucine ILE (I)163.22%
Histidine HIS (H)102.01%
Lysine LYS (K)163.22%
Methionine MET (M)132.62%
Leucine LEU (L)448.85%
Asparagine ASN (N)326.44%
Glutamine GLN (Q)132.62%
Proline PRO (P)295.84%
Serine SER (S)5010.06%
Arginine ARG (R)234.63%
Threonine THR (T)224.43%
Tryptophan TRP (W)81.61%
Valine VAL (V)295.84%
Tyrosine TYR (Y)275.43%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2489
HydrogenH3723
NitrogenN655
OxygenO754
SulphurS19

FormulaC2489H3723N655O754S19
Total Number of Atoms:7640


Total number of positively charged residues (ARG + LYS):39
Total number of negatively charged residues (ASP + GLU):56
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    84605
Absorption 0.1% (=1 g/l)    1.525,   assuming all pairs of CYS residues form cystines

Ext. coefficient    84230
Absorption 0.1% (=1 g/l)    1.518,   assuming all CYS residues are reduced
Aromaticity:0.131

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.87

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.99, 29.78, 23.54]

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:71.2475
Grand average of hydropathicity (GRAVY):-0.32