Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4462
Number of amino acids:255
Molecular Weight:29435.52 Da
Theoretical pI:9.28


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)114.31%
Cysteine CYS (C)103.92%
Glutamic Acid GLU (E)103.92%
Aspartic Acid ASP (D)114.31%
Glycine GLY (G)155.88%
Phynylalanine PHE (F)103.92%
Isoleucine ILE (I)135.1%
Histidine HIS (H)62.35%
Lysine LYS (K)124.71%
Methionine MET (M)72.75%
Leucine LEU (L)249.41%
Asparagine ASN (N)228.63%
Glutamine GLN (Q)103.92%
Proline PRO (P)20.78%
Serine SER (S)239.02%
Arginine ARG (R)218.24%
Threonine THR (T)145.49%
Tryptophan TRP (W)20.78%
Valine VAL (V)166.27%
Tyrosine TYR (Y)166.27%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1287
HydrogenH2022
NitrogenN376
OxygenO383
SulphurS17

FormulaC1287H2022N376O383S17
Total Number of Atoms:4085


Total number of positively charged residues (ARG + LYS):33
Total number of negatively charged residues (ASP + GLU):21
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    35465
Absorption 0.1% (=1 g/l)    1.205,   assuming all pairs of CYS residues form cystines

Ext. coefficient    34840
Absorption 0.1% (=1 g/l)    1.184,   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 : 44.39

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.76, 24.31, 20.39]

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:79.098
Grand average of hydropathicity (GRAVY):-0.40