Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1393
Number of amino acids:230
Molecular Weight:25047.97 Da
Theoretical pI:5.31


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)114.78%
Cysteine CYS (C)166.96%
Glutamic Acid GLU (E)52.17%
Aspartic Acid ASP (D)114.78%
Glycine GLY (G)2711.74%
Phynylalanine PHE (F)156.52%
Isoleucine ILE (I)73.04%
Histidine HIS (H)10.43%
Lysine LYS (K)52.17%
Methionine MET (M)41.74%
Leucine LEU (L)104.35%
Asparagine ASN (N)177.39%
Glutamine GLN (Q)114.78%
Proline PRO (P)187.83%
Serine SER (S)156.52%
Arginine ARG (R)93.91%
Threonine THR (T)2310%
Tryptophan TRP (W)62.61%
Valine VAL (V)104.35%
Tyrosine TYR (Y)93.91%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1098
HydrogenH1624
NitrogenN298
OxygenO338
SulphurS20

FormulaC1098H1624N298O338S20
Total Number of Atoms:3378


Total number of positively charged residues (ARG + LYS):14
Total number of negatively charged residues (ASP + GLU):16
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    47410
Absorption 0.1% (=1 g/l)    1.893,   assuming all pairs of CYS residues form cystines

Ext. coefficient    46410
Absorption 0.1% (=1 g/l)    1.853,   assuming all CYS residues are reduced
Aromaticity:0.130

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 38.01

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.78, 33.48, 13.04]

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:46.2174
Grand average of hydropathicity (GRAVY):-0.35