Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4911
Number of amino acids:249
Molecular Weight:26427.7 Da
Theoretical pI:9.24


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)239.24%
Cysteine CYS (C)83.21%
Glutamic Acid GLU (E)31.2%
Aspartic Acid ASP (D)52.01%
Glycine GLY (G)3815.26%
Phynylalanine PHE (F)135.22%
Isoleucine ILE (I)104.02%
Histidine HIS (H)52.01%
Lysine LYS (K)31.2%
Methionine MET (M)62.41%
Leucine LEU (L)145.62%
Asparagine ASN (N)208.03%
Glutamine GLN (Q)104.02%
Proline PRO (P)93.61%
Serine SER (S)218.43%
Arginine ARG (R)135.22%
Threonine THR (T)145.62%
Tryptophan TRP (W)72.81%
Valine VAL (V)176.83%
Tyrosine TYR (Y)104.02%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1167
HydrogenH1758
NitrogenN338
OxygenO341
SulphurS14

FormulaC1167H1758N338O341S14
Total Number of Atoms:3618


Total number of positively charged residues (ARG + LYS):16
Total number of negatively charged residues (ASP + GLU):8
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    53900
Absorption 0.1% (=1 g/l)    2.040,   assuming all pairs of CYS residues form cystines

Ext. coefficient    53400
Absorption 0.1% (=1 g/l)    2.021,   assuming all CYS residues are reduced
Aromaticity:0.120

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.18

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.51, 35.34, 18.47]

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:66.6265
Grand average of hydropathicity (GRAVY):-0.06