Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4706
Number of amino acids:263
Molecular Weight:28484.27 Da
Theoretical pI:8.87


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)4015.21%
Cysteine CYS (C)10.38%
Glutamic Acid GLU (E)10.38%
Aspartic Acid ASP (D)00%
Glycine GLY (G)41.52%
Phynylalanine PHE (F)93.42%
Isoleucine ILE (I)93.42%
Histidine HIS (H)31.14%
Lysine LYS (K)10.38%
Methionine MET (M)62.28%
Leucine LEU (L)5119.39%
Asparagine ASN (N)134.94%
Glutamine GLN (Q)5019.01%
Proline PRO (P)228.37%
Serine SER (S)176.46%
Arginine ARG (R)20.76%
Threonine THR (T)103.8%
Tryptophan TRP (W)00%
Valine VAL (V)166.08%
Tyrosine TYR (Y)83.04%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1298
HydrogenH2081
NitrogenN339
OxygenO364
SulphurS7

FormulaC1298H2081N339O364S7
Total Number of Atoms:4089


Total number of positively charged residues (ARG + LYS):3
Total number of negatively charged residues (ASP + GLU):1
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    11920
Absorption 0.1% (=1 g/l)    0.418,   assuming all pairs of CYS residues form cystines

Ext. coefficient    11920
Absorption 0.1% (=1 g/l)    0.418,   assuming all CYS residues are reduced
Aromaticity:0.065

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 62.44

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[35.36, 21.29, 37.26]

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:121.825
Grand average of hydropathicity (GRAVY):0.37