Physicochemical Properties of Peptide



PPepDB ID:PPepDB_973
Number of amino acids:254
Molecular Weight:27092.86 Da
Theoretical pI:7.9


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)249.45%
Cysteine CYS (C)166.3%
Glutamic Acid GLU (E)83.15%
Aspartic Acid ASP (D)62.36%
Glycine GLY (G)239.06%
Phynylalanine PHE (F)145.51%
Isoleucine ILE (I)62.36%
Histidine HIS (H)135.12%
Lysine LYS (K)72.76%
Methionine MET (M)20.79%
Leucine LEU (L)187.09%
Asparagine ASN (N)124.72%
Glutamine GLN (Q)83.15%
Proline PRO (P)187.09%
Serine SER (S)197.48%
Arginine ARG (R)93.54%
Threonine THR (T)197.48%
Tryptophan TRP (W)41.57%
Valine VAL (V)239.06%
Tyrosine TYR (Y)51.97%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1199
HydrogenH1830
NitrogenN338
OxygenO346
SulphurS18

FormulaC1199H1830N338O346S18
Total Number of Atoms:3731


Total number of positively charged residues (ARG + LYS):16
Total number of negatively charged residues (ASP + GLU):14
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    30450
Absorption 0.1% (=1 g/l)    1.124,   assuming all pairs of CYS residues form cystines

Ext. coefficient    29450
Absorption 0.1% (=1 g/l)    1.087,   assuming all CYS residues are reduced
Aromaticity:0.091

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.99

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.56, 28.35, 20.47]

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:72.559
Grand average of hydropathicity (GRAVY):0.05