Physicochemical Properties of Peptide



PPepDB ID:PPepDB_702
Number of amino acids:255
Molecular Weight:26467.41 Da
Theoretical pI:8.22


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3011.76%
Cysteine CYS (C)145.49%
Glutamic Acid GLU (E)41.57%
Aspartic Acid ASP (D)114.31%
Glycine GLY (G)3814.9%
Phynylalanine PHE (F)124.71%
Isoleucine ILE (I)51.96%
Histidine HIS (H)41.57%
Lysine LYS (K)62.35%
Methionine MET (M)31.18%
Leucine LEU (L)93.53%
Asparagine ASN (N)72.75%
Glutamine GLN (Q)114.31%
Proline PRO (P)187.06%
Serine SER (S)207.84%
Arginine ARG (R)124.71%
Threonine THR (T)249.41%
Tryptophan TRP (W)72.75%
Valine VAL (V)114.31%
Tyrosine TYR (Y)93.53%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1153
HydrogenH1726
NitrogenN330
OxygenO357
SulphurS17

FormulaC1153H1726N330O357S17
Total Number of Atoms:3583


Total number of positively charged residues (ARG + LYS):18
Total number of negatively charged residues (ASP + GLU):15
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    52785
Absorption 0.1% (=1 g/l)    1.994,   assuming all pairs of CYS residues form cystines

Ext. coefficient    51910
Absorption 0.1% (=1 g/l)    1.961,   assuming all CYS residues are reduced
Aromaticity:0.110

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 31.84

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[20.78, 32.55, 18.04]

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:45.6863
Grand average of hydropathicity (GRAVY):-0.27