Physicochemical Properties of Peptide



PPepDB ID:PPepDB_865
Number of amino acids:255
Molecular Weight:27675.41 Da
Theoretical pI:8.06


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)176.67%
Cysteine CYS (C)187.06%
Glutamic Acid GLU (E)72.75%
Aspartic Acid ASP (D)145.49%
Glycine GLY (G)249.41%
Phynylalanine PHE (F)155.88%
Isoleucine ILE (I)93.53%
Histidine HIS (H)51.96%
Lysine LYS (K)145.49%
Methionine MET (M)31.18%
Leucine LEU (L)155.88%
Asparagine ASN (N)114.31%
Glutamine GLN (Q)93.53%
Proline PRO (P)135.1%
Serine SER (S)207.84%
Arginine ARG (R)103.92%
Threonine THR (T)228.63%
Tryptophan TRP (W)31.18%
Valine VAL (V)176.67%
Tyrosine TYR (Y)93.53%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1213
HydrogenH1864
NitrogenN332
OxygenO369
SulphurS21

FormulaC1213H1864N332O369S21
Total Number of Atoms:3799


Total number of positively charged residues (ARG + LYS):24
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    31035
Absorption 0.1% (=1 g/l)    1.121,   assuming all pairs of CYS residues form cystines

Ext. coefficient    29910
Absorption 0.1% (=1 g/l)    1.081,   assuming all CYS residues are reduced
Aromaticity:0.106

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.66

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.67, 26.67, 16.47]

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:62.7059
Grand average of hydropathicity (GRAVY):-0.17