Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4019
Number of amino acids:451
Molecular Weight:49623.01 Da
Theoretical pI:9.13


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)5411.97%
Cysteine CYS (C)173.77%
Glutamic Acid GLU (E)71.55%
Aspartic Acid ASP (D)194.21%
Glycine GLY (G)316.87%
Phynylalanine PHE (F)173.77%
Isoleucine ILE (I)122.66%
Histidine HIS (H)102.22%
Lysine LYS (K)153.33%
Methionine MET (M)153.33%
Leucine LEU (L)316.87%
Asparagine ASN (N)255.54%
Glutamine GLN (Q)183.99%
Proline PRO (P)306.65%
Serine SER (S)224.88%
Arginine ARG (R)265.76%
Threonine THR (T)316.87%
Tryptophan TRP (W)112.44%
Valine VAL (V)398.65%
Tyrosine TYR (Y)214.66%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2213
HydrogenH3398
NitrogenN618
OxygenO621
SulphurS32

FormulaC2213H3398N618O621S32
Total Number of Atoms:6882


Total number of positively charged residues (ARG + LYS):41
Total number of negatively charged residues (ASP + GLU):26
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    92790
Absorption 0.1% (=1 g/l)    1.870,   assuming all pairs of CYS residues form cystines

Ext. coefficient    91790
Absorption 0.1% (=1 g/l)    1.850,   assuming all CYS residues are reduced
Aromaticity:0.109

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 32.46

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.05, 23.95, 23.73]

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:74.235
Grand average of hydropathicity (GRAVY):-0.08