Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2092
Number of amino acids:50
Molecular Weight:5483.16 Da
Theoretical pI:8.5


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)36%
Cysteine CYS (C)816%
Glutamic Acid GLU (E)24%
Aspartic Acid ASP (D)00%
Glycine GLY (G)612%
Phynylalanine PHE (F)12%
Isoleucine ILE (I)12%
Histidine HIS (H)24%
Lysine LYS (K)24%
Methionine MET (M)00%
Leucine LEU (L)12%
Asparagine ASN (N)36%
Glutamine GLN (Q)24%
Proline PRO (P)24%
Serine SER (S)612%
Arginine ARG (R)36%
Threonine THR (T)12%
Tryptophan TRP (W)12%
Valine VAL (V)24%
Tyrosine TYR (Y)48%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC229
HydrogenH343
NitrogenN71
OxygenO71
SulphurS8

FormulaC229H343N71O71S8
Total Number of Atoms:722


Total number of positively charged residues (ARG + LYS):5
Total number of negatively charged residues (ASP + GLU):2
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    11960
Absorption 0.1% (=1 g/l)    2.181,   assuming all pairs of CYS residues form cystines

Ext. coefficient    11460
Absorption 0.1% (=1 g/l)    2.090,   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 : 23.53

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[20.00, 34.00, 12.00]

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:33.2
Grand average of hydropathicity (GRAVY):-0.49