Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1073
Number of amino acids:255
Molecular Weight:26237.5 Da
Theoretical pI:4.6


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)249.41%
Cysteine CYS (C)166.27%
Glutamic Acid GLU (E)72.75%
Aspartic Acid ASP (D)145.49%
Glycine GLY (G)2911.37%
Phynylalanine PHE (F)124.71%
Isoleucine ILE (I)51.96%
Histidine HIS (H)10.39%
Lysine LYS (K)93.53%
Methionine MET (M)31.18%
Leucine LEU (L)218.24%
Asparagine ASN (N)62.35%
Glutamine GLN (Q)41.57%
Proline PRO (P)166.27%
Serine SER (S)2911.37%
Arginine ARG (R)51.96%
Threonine THR (T)2710.59%
Tryptophan TRP (W)31.18%
Valine VAL (V)155.88%
Tyrosine TYR (Y)93.53%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1146
HydrogenH1764
NitrogenN294
OxygenO373
SulphurS19

FormulaC1146H1764N294O373S19
Total Number of Atoms:3596


Total number of positively charged residues (ARG + LYS):14
Total number of negatively charged residues (ASP + GLU):21
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    30910
Absorption 0.1% (=1 g/l)    1.178,   assuming all pairs of CYS residues form cystines

Ext. coefficient    29910
Absorption 0.1% (=1 g/l)    1.140,   assuming all CYS residues are reduced
Aromaticity:0.094

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.63

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.49, 31.37, 21.57]

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:66.2352
Grand average of hydropathicity (GRAVY):0.10