Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2186
Number of amino acids:45
Molecular Weight:5194.85 Da
Theoretical pI:8.51


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)24.44%
Cysteine CYS (C)817.78%
Glutamic Acid GLU (E)24.44%
Aspartic Acid ASP (D)48.89%
Glycine GLY (G)36.67%
Phynylalanine PHE (F)24.44%
Isoleucine ILE (I)00%
Histidine HIS (H)12.22%
Lysine LYS (K)36.67%
Methionine MET (M)00%
Leucine LEU (L)12.22%
Asparagine ASN (N)24.44%
Glutamine GLN (Q)00%
Proline PRO (P)12.22%
Serine SER (S)24.44%
Arginine ARG (R)613.33%
Threonine THR (T)511.11%
Tryptophan TRP (W)12.22%
Valine VAL (V)12.22%
Tyrosine TYR (Y)12.22%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC210
HydrogenH331
NitrogenN71
OxygenO68
SulphurS8

FormulaC210H331N71O68S8
Total Number of Atoms:688


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):6
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    7490
Absorption 0.1% (=1 g/l)    1.442,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    1.346,   assuming all CYS residues are reduced
Aromaticity:0.089

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 24.94

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[13.33, 17.78, 11.11]

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:19.5555
Grand average of hydropathicity (GRAVY):-0.95