Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1467
Number of amino acids:135
Molecular Weight:14897.47 Da
Theoretical pI:9.19


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1410.37%
Cysteine CYS (C)64.44%
Glutamic Acid GLU (E)21.48%
Aspartic Acid ASP (D)64.44%
Glycine GLY (G)1611.85%
Phynylalanine PHE (F)21.48%
Isoleucine ILE (I)32.22%
Histidine HIS (H)32.22%
Lysine LYS (K)32.22%
Methionine MET (M)10.74%
Leucine LEU (L)64.44%
Asparagine ASN (N)1410.37%
Glutamine GLN (Q)85.93%
Proline PRO (P)53.7%
Serine SER (S)96.67%
Arginine ARG (R)118.15%
Threonine THR (T)32.22%
Tryptophan TRP (W)64.44%
Valine VAL (V)107.41%
Tyrosine TYR (Y)75.19%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC644
HydrogenH971
NitrogenN205
OxygenO193
SulphurS7

FormulaC644H971N205O193S7
Total Number of Atoms:2020


Total number of positively charged residues (ARG + LYS):14
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    43805
Absorption 0.1% (=1 g/l)    2.940,   assuming all pairs of CYS residues form cystines

Ext. coefficient    43430
Absorption 0.1% (=1 g/l)    2.915,   assuming all CYS residues are reduced
Aromaticity:0.111

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.69

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.19, 32.59, 17.04]

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:57.8519
Grand average of hydropathicity (GRAVY):-0.65