Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4433
Number of amino acids:267
Molecular Weight:29018.79 Da
Theoretical pI:9.35


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)4516.85%
Cysteine CYS (C)20.75%
Glutamic Acid GLU (E)10.37%
Aspartic Acid ASP (D)00%
Glycine GLY (G)20.75%
Phynylalanine PHE (F)93.37%
Isoleucine ILE (I)124.49%
Histidine HIS (H)31.12%
Lysine LYS (K)10.37%
Methionine MET (M)41.5%
Leucine LEU (L)4617.23%
Asparagine ASN (N)165.99%
Glutamine GLN (Q)5018.73%
Proline PRO (P)228.24%
Serine SER (S)145.24%
Arginine ARG (R)41.5%
Threonine THR (T)103.75%
Tryptophan TRP (W)10.37%
Valine VAL (V)176.37%
Tyrosine TYR (Y)83%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1321
HydrogenH2111
NitrogenN353
OxygenO368
SulphurS6

FormulaC1321H2111N353O368S6
Total Number of Atoms:4159


Total number of positively charged residues (ARG + LYS):5
Total number of negatively charged residues (ASP + GLU):1
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    17545
Absorption 0.1% (=1 g/l)    0.605,   assuming all pairs of CYS residues form cystines

Ext. coefficient    17420
Absorption 0.1% (=1 g/l)    0.600,   assuming all CYS residues are reduced
Aromaticity:0.067

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 58.09

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.83, 20.22, 35.96]

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:120.038
Grand average of hydropathicity (GRAVY):0.33