Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4251
Number of amino acids:479
Molecular Weight:53256.32 Da
Theoretical pI:7.81


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)326.68%
Cysteine CYS (C)71.46%
Glutamic Acid GLU (E)214.38%
Aspartic Acid ASP (D)173.55%
Glycine GLY (G)408.35%
Phynylalanine PHE (F)132.71%
Isoleucine ILE (I)255.22%
Histidine HIS (H)122.51%
Lysine LYS (K)112.3%
Methionine MET (M)112.3%
Leucine LEU (L)469.6%
Asparagine ASN (N)326.68%
Glutamine GLN (Q)6012.53%
Proline PRO (P)275.64%
Serine SER (S)224.59%
Arginine ARG (R)285.85%
Threonine THR (T)224.59%
Tryptophan TRP (W)40.84%
Valine VAL (V)377.72%
Tyrosine TYR (Y)122.51%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2328
HydrogenH3704
NitrogenN694
OxygenO704
SulphurS18

FormulaC2328H3704N694O704S18
Total Number of Atoms:7448


Total number of positively charged residues (ARG + LYS):39
Total number of negatively charged residues (ASP + GLU):38
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    40255
Absorption 0.1% (=1 g/l)    0.756,   assuming all pairs of CYS residues form cystines

Ext. coefficient    39880
Absorption 0.1% (=1 g/l)    0.749,   assuming all CYS residues are reduced
Aromaticity:0.061

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 45.84

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.60, 25.26, 22.96]

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:86.8894
Grand average of hydropathicity (GRAVY):-0.41