Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4926
Number of amino acids:456
Molecular Weight:49299.81 Da
Theoretical pI:5.36


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)265.7%
Cysteine CYS (C)143.07%
Glutamic Acid GLU (E)183.95%
Aspartic Acid ASP (D)265.7%
Glycine GLY (G)459.87%
Phynylalanine PHE (F)235.04%
Isoleucine ILE (I)357.68%
Histidine HIS (H)61.32%
Lysine LYS (K)204.39%
Methionine MET (M)112.41%
Leucine LEU (L)306.58%
Asparagine ASN (N)245.26%
Glutamine GLN (Q)245.26%
Proline PRO (P)153.29%
Serine SER (S)4710.31%
Arginine ARG (R)163.51%
Threonine THR (T)306.58%
Tryptophan TRP (W)81.75%
Valine VAL (V)327.02%
Tyrosine TYR (Y)61.32%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2162
HydrogenH3396
NitrogenN592
OxygenO676
SulphurS25

FormulaC2162H3396N592O676S25
Total Number of Atoms:6851


Total number of positively charged residues (ARG + LYS):36
Total number of negatively charged residues (ASP + GLU):44
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    53815
Absorption 0.1% (=1 g/l)    1.092,   assuming all pairs of CYS residues form cystines

Ext. coefficient    52940
Absorption 0.1% (=1 g/l)    1.074,   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 : 37.64

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.39, 28.73, 18.64]

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:81.6447
Grand average of hydropathicity (GRAVY):-0.07