Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4325
Number of amino acids:484
Molecular Weight:53389 Da
Theoretical pI:5.59


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)367.44%
Cysteine CYS (C)81.65%
Glutamic Acid GLU (E)265.37%
Aspartic Acid ASP (D)336.82%
Glycine GLY (G)438.88%
Phynylalanine PHE (F)183.72%
Isoleucine ILE (I)183.72%
Histidine HIS (H)163.31%
Lysine LYS (K)265.37%
Methionine MET (M)112.27%
Leucine LEU (L)479.71%
Asparagine ASN (N)255.17%
Glutamine GLN (Q)112.27%
Proline PRO (P)214.34%
Serine SER (S)428.68%
Arginine ARG (R)193.93%
Threonine THR (T)234.75%
Tryptophan TRP (W)81.65%
Valine VAL (V)316.4%
Tyrosine TYR (Y)224.55%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2372
HydrogenH3639
NitrogenN643
OxygenO726
SulphurS19

FormulaC2372H3639N643O726S19
Total Number of Atoms:7399


Total number of positively charged residues (ARG + LYS):45
Total number of negatively charged residues (ASP + GLU):59
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    77280
Absorption 0.1% (=1 g/l)    1.447,   assuming all pairs of CYS residues form cystines

Ext. coefficient    76780
Absorption 0.1% (=1 g/l)    1.438,   assuming all CYS residues are reduced
Aromaticity:0.099

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 41.73

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.75, 27.07, 24.79]

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:78.3884
Grand average of hydropathicity (GRAVY):-0.33