Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4431
Number of amino acids:666
Molecular Weight:78216.97 Da
Theoretical pI:6.08


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)294.35%
Cysteine CYS (C)213.15%
Glutamic Acid GLU (E)7811.71%
Aspartic Acid ASP (D)284.2%
Glycine GLY (G)416.16%
Phynylalanine PHE (F)284.2%
Isoleucine ILE (I)233.45%
Histidine HIS (H)182.7%
Lysine LYS (K)274.05%
Methionine MET (M)131.95%
Leucine LEU (L)487.21%
Asparagine ASN (N)314.65%
Glutamine GLN (Q)6910.36%
Proline PRO (P)274.05%
Serine SER (S)406.01%
Arginine ARG (R)6910.36%
Threonine THR (T)223.3%
Tryptophan TRP (W)20.3%
Valine VAL (V)284.2%
Tyrosine TYR (Y)243.6%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3351
HydrogenH5258
NitrogenN1038
OxygenO1065
SulphurS34

FormulaC3351H5258N1038O1065S34
Total Number of Atoms:10746


Total number of positively charged residues (ARG + LYS):96
Total number of negatively charged residues (ASP + GLU):106
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    48010
Absorption 0.1% (=1 g/l)    0.614,   assuming all pairs of CYS residues form cystines

Ext. coefficient    46760
Absorption 0.1% (=1 g/l)    0.598,   assuming all CYS residues are reduced
Aromaticity:0.081

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 70.92

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[22.97, 20.87, 25.23]

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:58.1231
Grand average of hydropathicity (GRAVY):-1.09