Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4999
Number of amino acids:264
Molecular Weight:29736.98 Da
Theoretical pI:6.18


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)124.55%
Cysteine CYS (C)51.89%
Glutamic Acid GLU (E)134.92%
Aspartic Acid ASP (D)124.55%
Glycine GLY (G)249.09%
Phynylalanine PHE (F)134.92%
Isoleucine ILE (I)72.65%
Histidine HIS (H)72.65%
Lysine LYS (K)93.41%
Methionine MET (M)51.89%
Leucine LEU (L)228.33%
Asparagine ASN (N)207.58%
Glutamine GLN (Q)114.17%
Proline PRO (P)93.41%
Serine SER (S)2710.23%
Arginine ARG (R)134.92%
Threonine THR (T)176.44%
Tryptophan TRP (W)51.89%
Valine VAL (V)166.06%
Tyrosine TYR (Y)176.44%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1319
HydrogenH1976
NitrogenN362
OxygenO407
SulphurS10

FormulaC1319H1976N362O407S10
Total Number of Atoms:4074


Total number of positively charged residues (ARG + LYS):22
Total number of negatively charged residues (ASP + GLU):25
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    53080
Absorption 0.1% (=1 g/l)    1.785,   assuming all pairs of CYS residues form cystines

Ext. coefficient    52830
Absorption 0.1% (=1 g/l)    1.777,   assuming all CYS residues are reduced
Aromaticity:0.133

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 46.97

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.30, 30.30, 19.70]

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:64.9621
Grand average of hydropathicity (GRAVY):-0.51