Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5838
Number of amino acids:262
Molecular Weight:30403.33 Da
Theoretical pI:8.76


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)93.44%
Cysteine CYS (C)41.53%
Glutamic Acid GLU (E)51.91%
Aspartic Acid ASP (D)10.38%
Glycine GLY (G)51.91%
Phynylalanine PHE (F)93.44%
Isoleucine ILE (I)134.96%
Histidine HIS (H)62.29%
Lysine LYS (K)41.53%
Methionine MET (M)20.76%
Leucine LEU (L)249.16%
Asparagine ASN (N)51.91%
Glutamine GLN (Q)9235.11%
Proline PRO (P)3613.74%
Serine SER (S)145.34%
Arginine ARG (R)51.91%
Threonine THR (T)62.29%
Tryptophan TRP (W)10.38%
Valine VAL (V)145.34%
Tyrosine TYR (Y)72.67%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1351
HydrogenH2107
NitrogenN391
OxygenO399
SulphurS6

FormulaC1351H2107N391O399S6
Total Number of Atoms:4254


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):6
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    16180
Absorption 0.1% (=1 g/l)    0.532,   assuming all pairs of CYS residues form cystines

Ext. coefficient    15930
Absorption 0.1% (=1 g/l)    0.524,   assuming all CYS residues are reduced
Aromaticity:0.065

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 116.27

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.95, 22.90, 15.27]

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:74.0076
Grand average of hydropathicity (GRAVY):-0.91