Physicochemical Properties of Peptide



PPepDB ID:PPepDB_962
Number of amino acids:243
Molecular Weight:26123.09 Da
Theoretical pI:9.28


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)239.47%
Cysteine CYS (C)166.58%
Glutamic Acid GLU (E)20.82%
Aspartic Acid ASP (D)83.29%
Glycine GLY (G)2510.29%
Phynylalanine PHE (F)124.94%
Isoleucine ILE (I)93.7%
Histidine HIS (H)31.23%
Lysine LYS (K)114.53%
Methionine MET (M)41.65%
Leucine LEU (L)218.64%
Asparagine ASN (N)124.94%
Glutamine GLN (Q)83.29%
Proline PRO (P)166.58%
Serine SER (S)229.05%
Arginine ARG (R)145.76%
Threonine THR (T)124.94%
Tryptophan TRP (W)31.23%
Valine VAL (V)114.53%
Tyrosine TYR (Y)114.53%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1154
HydrogenH1791
NitrogenN325
OxygenO329
SulphurS20

FormulaC1154H1791N325O329S20
Total Number of Atoms:3619


Total number of positively charged residues (ARG + LYS):25
Total number of negatively charged residues (ASP + GLU):10
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    33890
Absorption 0.1% (=1 g/l)    1.297,   assuming all pairs of CYS residues form cystines

Ext. coefficient    32890
Absorption 0.1% (=1 g/l)    1.259,   assuming all CYS residues are reduced
Aromaticity:0.107

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 55.70

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.57, 30.86, 20.58]

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:70.7407
Grand average of hydropathicity (GRAVY):-0.04