Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4685
Number of amino acids:147
Molecular Weight:16235.33 Da
Theoretical pI:6.9


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1510.2%
Cysteine CYS (C)74.76%
Glutamic Acid GLU (E)21.36%
Aspartic Acid ASP (D)96.12%
Glycine GLY (G)128.16%
Phynylalanine PHE (F)42.72%
Isoleucine ILE (I)42.72%
Histidine HIS (H)21.36%
Lysine LYS (K)32.04%
Methionine MET (M)53.4%
Leucine LEU (L)128.16%
Asparagine ASN (N)149.52%
Glutamine GLN (Q)96.12%
Proline PRO (P)42.72%
Serine SER (S)64.08%
Arginine ARG (R)85.44%
Threonine THR (T)106.8%
Tryptophan TRP (W)42.72%
Valine VAL (V)117.48%
Tyrosine TYR (Y)64.08%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC703
HydrogenH1087
NitrogenN205
OxygenO215
SulphurS12

FormulaC703H1087N205O215S12
Total Number of Atoms:2222


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):11
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    31315
Absorption 0.1% (=1 g/l)    1.929,   assuming all pairs of CYS residues form cystines

Ext. coefficient    30940
Absorption 0.1% (=1 g/l)    1.906,   assuming all CYS residues are reduced
Aromaticity:0.095

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 17.92

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.89, 24.49, 23.13]

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:74.3538
Grand average of hydropathicity (GRAVY):-0.22