Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1036
Number of amino acids:246
Molecular Weight:26703.93 Da
Theoretical pI:6.67


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)166.5%
Cysteine CYS (C)166.5%
Glutamic Acid GLU (E)62.44%
Aspartic Acid ASP (D)124.88%
Glycine GLY (G)2710.98%
Phynylalanine PHE (F)166.5%
Isoleucine ILE (I)72.85%
Histidine HIS (H)20.81%
Lysine LYS (K)52.03%
Methionine MET (M)41.63%
Leucine LEU (L)124.88%
Asparagine ASN (N)166.5%
Glutamine GLN (Q)93.66%
Proline PRO (P)218.54%
Serine SER (S)166.5%
Arginine ARG (R)135.28%
Threonine THR (T)239.35%
Tryptophan TRP (W)52.03%
Valine VAL (V)114.47%
Tyrosine TYR (Y)93.66%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1171
HydrogenH1750
NitrogenN324
OxygenO356
SulphurS20

FormulaC1171H1750N324O356S20
Total Number of Atoms:3621


Total number of positively charged residues (ARG + LYS):18
Total number of negatively charged residues (ASP + GLU):18
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    41910
Absorption 0.1% (=1 g/l)    1.569,   assuming all pairs of CYS residues form cystines

Ext. coefficient    40910
Absorption 0.1% (=1 g/l)    1.532,   assuming all CYS residues are reduced
Aromaticity:0.122

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.37

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.39, 32.52, 15.45]

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:49.5935
Grand average of hydropathicity (GRAVY):-0.33