Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5603
Number of amino acids:262
Molecular Weight:28791.46 Da
Theoretical pI:9.33


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)228.4%
Cysteine CYS (C)83.05%
Glutamic Acid GLU (E)41.53%
Aspartic Acid ASP (D)51.91%
Glycine GLY (G)3212.21%
Phynylalanine PHE (F)186.87%
Isoleucine ILE (I)103.82%
Histidine HIS (H)41.53%
Lysine LYS (K)93.44%
Methionine MET (M)83.05%
Leucine LEU (L)103.82%
Asparagine ASN (N)155.73%
Glutamine GLN (Q)83.05%
Proline PRO (P)124.58%
Serine SER (S)2810.69%
Arginine ARG (R)114.2%
Threonine THR (T)186.87%
Tryptophan TRP (W)103.82%
Valine VAL (V)134.96%
Tyrosine TYR (Y)176.49%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1304
HydrogenH1897
NitrogenN345
OxygenO367
SulphurS16

FormulaC1304H1897N345O367S16
Total Number of Atoms:3929


Total number of positively charged residues (ARG + LYS):20
Total number of negatively charged residues (ASP + GLU):9
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    80830
Absorption 0.1% (=1 g/l)    2.807,   assuming all pairs of CYS residues form cystines

Ext. coefficient    80330
Absorption 0.1% (=1 g/l)    2.790,   assuming all CYS residues are reduced
Aromaticity:0.172

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 22.63

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.77, 33.21, 16.79]

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:52.5572
Grand average of hydropathicity (GRAVY):-0.17