Physicochemical Properties of Peptide



PPepDB ID:PPepDB_913
Number of amino acids:233
Molecular Weight:24904.2 Da
Theoretical pI:8.67


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)229.44%
Cysteine CYS (C)166.87%
Glutamic Acid GLU (E)20.86%
Aspartic Acid ASP (D)93.86%
Glycine GLY (G)2410.3%
Phynylalanine PHE (F)104.29%
Isoleucine ILE (I)83.43%
Histidine HIS (H)10.43%
Lysine LYS (K)104.29%
Methionine MET (M)52.15%
Leucine LEU (L)114.72%
Asparagine ASN (N)156.44%
Glutamine GLN (Q)125.15%
Proline PRO (P)125.15%
Serine SER (S)166.87%
Arginine ARG (R)83.43%
Threonine THR (T)2410.3%
Tryptophan TRP (W)41.72%
Valine VAL (V)135.58%
Tyrosine TYR (Y)114.72%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1083
HydrogenH1664
NitrogenN300
OxygenO334
SulphurS21

FormulaC1083H1664N300O334S21
Total Number of Atoms:3402


Total number of positively charged residues (ARG + LYS):18
Total number of negatively charged residues (ASP + GLU):11
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    39390
Absorption 0.1% (=1 g/l)    1.582,   assuming all pairs of CYS residues form cystines

Ext. coefficient    38390
Absorption 0.1% (=1 g/l)    1.542,   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 : 26.42

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.46, 28.76, 17.17]

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:57.4249
Grand average of hydropathicity (GRAVY):-0.16