Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4420
Number of amino acids:841
Molecular Weight:92172.3 Da
Theoretical pI:5.89


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)667.85%
Cysteine CYS (C)222.62%
Glutamic Acid GLU (E)465.47%
Aspartic Acid ASP (D)344.04%
Glycine GLY (G)8910.58%
Phynylalanine PHE (F)354.16%
Isoleucine ILE (I)354.16%
Histidine HIS (H)182.14%
Lysine LYS (K)394.64%
Methionine MET (M)202.38%
Leucine LEU (L)597.02%
Asparagine ASN (N)404.76%
Glutamine GLN (Q)364.28%
Proline PRO (P)445.23%
Serine SER (S)586.9%
Arginine ARG (R)293.45%
Threonine THR (T)485.71%
Tryptophan TRP (W)232.73%
Valine VAL (V)647.61%
Tyrosine TYR (Y)364.28%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC4126
HydrogenH6264
NitrogenN1102
OxygenO1220
SulphurS42

FormulaC4126H6264N1102O1220S42
Total Number of Atoms:12754


Total number of positively charged residues (ARG + LYS):68
Total number of negatively charged residues (ASP + GLU):80
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    181515
Absorption 0.1% (=1 g/l)    1.969,   assuming all pairs of CYS residues form cystines

Ext. coefficient    180140
Absorption 0.1% (=1 g/l)    1.954,   assuming all CYS residues are reduced
Aromaticity:0.112

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.49

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.96, 27.47, 22.71]

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:73.5077
Grand average of hydropathicity (GRAVY):-0.21