Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5944
Number of amino acids:441
Molecular Weight:50279.25 Da
Theoretical pI:6.16


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)184.08%
Cysteine CYS (C)102.27%
Glutamic Acid GLU (E)296.58%
Aspartic Acid ASP (D)173.85%
Glycine GLY (G)347.71%
Phynylalanine PHE (F)245.44%
Isoleucine ILE (I)327.26%
Histidine HIS (H)112.49%
Lysine LYS (K)235.22%
Methionine MET (M)92.04%
Leucine LEU (L)398.84%
Asparagine ASN (N)235.22%
Glutamine GLN (Q)143.17%
Proline PRO (P)255.67%
Serine SER (S)378.39%
Arginine ARG (R)184.08%
Threonine THR (T)235.22%
Tryptophan TRP (W)92.04%
Valine VAL (V)204.54%
Tyrosine TYR (Y)265.9%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2287
HydrogenH3454
NitrogenN586
OxygenO657
SulphurS19

FormulaC2287H3454N586O657S19
Total Number of Atoms:7003


Total number of positively charged residues (ARG + LYS):41
Total number of negatively charged residues (ASP + GLU):46
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    88865
Absorption 0.1% (=1 g/l)    1.767,   assuming all pairs of CYS residues form cystines

Ext. coefficient    88240
Absorption 0.1% (=1 g/l)    1.755,   assuming all CYS residues are reduced
Aromaticity:0.134

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 42.86

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.01, 26.98, 21.54]

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:80.0227
Grand average of hydropathicity (GRAVY):-0.27