Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4149
Number of amino acids:445
Molecular Weight:49100.39 Da
Theoretical pI:6.37


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)347.64%
Cysteine CYS (C)20.45%
Glutamic Acid GLU (E)265.84%
Aspartic Acid ASP (D)265.84%
Glycine GLY (G)286.29%
Phynylalanine PHE (F)153.37%
Isoleucine ILE (I)265.84%
Histidine HIS (H)163.6%
Lysine LYS (K)224.94%
Methionine MET (M)112.47%
Leucine LEU (L)5111.46%
Asparagine ASN (N)153.37%
Glutamine GLN (Q)122.7%
Proline PRO (P)398.76%
Serine SER (S)327.19%
Arginine ARG (R)255.62%
Threonine THR (T)224.94%
Tryptophan TRP (W)10.22%
Valine VAL (V)296.52%
Tyrosine TYR (Y)132.92%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2200
HydrogenH3496
NitrogenN602
OxygenO644
SulphurS13

FormulaC2200H3496N602O644S13
Total Number of Atoms:6955


Total number of positively charged residues (ARG + LYS):47
Total number of negatively charged residues (ASP + GLU):52
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    24995
Absorption 0.1% (=1 g/l)    0.509,   assuming all pairs of CYS residues form cystines

Ext. coefficient    24870
Absorption 0.1% (=1 g/l)    0.507,   assuming all CYS residues are reduced
Aromaticity:0.065

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 55.97

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.34, 25.62, 27.42]

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:94.0226
Grand average of hydropathicity (GRAVY):-0.22