Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5316
Number of amino acids:484
Molecular Weight:54568.66 Da
Theoretical pI:5.4


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)306.2%
Cysteine CYS (C)81.65%
Glutamic Acid GLU (E)377.64%
Aspartic Acid ASP (D)183.72%
Glycine GLY (G)398.06%
Phynylalanine PHE (F)306.2%
Isoleucine ILE (I)214.34%
Histidine HIS (H)122.48%
Lysine LYS (K)122.48%
Methionine MET (M)71.45%
Leucine LEU (L)357.23%
Asparagine ASN (N)377.64%
Glutamine GLN (Q)449.09%
Proline PRO (P)234.75%
Serine SER (S)347.02%
Arginine ARG (R)295.99%
Threonine THR (T)163.31%
Tryptophan TRP (W)40.83%
Valine VAL (V)336.82%
Tyrosine TYR (Y)153.1%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2401
HydrogenH3672
NitrogenN692
OxygenO741
SulphurS15

FormulaC2401H3672N692O741S15
Total Number of Atoms:7521


Total number of positively charged residues (ARG + LYS):41
Total number of negatively charged residues (ASP + GLU):55
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    44850
Absorption 0.1% (=1 g/l)    0.822,   assuming all pairs of CYS residues form cystines

Ext. coefficient    44350
Absorption 0.1% (=1 g/l)    0.813,   assuming all CYS residues are reduced
Aromaticity:0.101

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 53.89

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.51, 27.48, 22.52]

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:71.095
Grand average of hydropathicity (GRAVY):-0.55