Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4698
Number of amino acids:649
Molecular Weight:72000.42 Da
Theoretical pI:8.75


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)436.63%
Cysteine CYS (C)182.77%
Glutamic Acid GLU (E)345.24%
Aspartic Acid ASP (D)345.24%
Glycine GLY (G)497.55%
Phynylalanine PHE (F)253.85%
Isoleucine ILE (I)304.62%
Histidine HIS (H)121.85%
Lysine LYS (K)426.47%
Methionine MET (M)152.31%
Leucine LEU (L)649.86%
Asparagine ASN (N)294.47%
Glutamine GLN (Q)223.39%
Proline PRO (P)243.7%
Serine SER (S)588.94%
Arginine ARG (R)375.7%
Threonine THR (T)345.24%
Tryptophan TRP (W)50.77%
Valine VAL (V)487.4%
Tyrosine TYR (Y)264.01%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3182
HydrogenH5050
NitrogenN882
OxygenO955
SulphurS33

FormulaC3182H5050N882O955S33
Total Number of Atoms:10102


Total number of positively charged residues (ARG + LYS):79
Total number of negatively charged residues (ASP + GLU):68
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    67365
Absorption 0.1% (=1 g/l)    0.936,   assuming all pairs of CYS residues form cystines

Ext. coefficient    66240
Absorption 0.1% (=1 g/l)    0.920,   assuming all CYS residues are reduced
Aromaticity:0.086

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 45.77

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.51, 24.65, 24.04]

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:84.5609
Grand average of hydropathicity (GRAVY):-0.23