Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1563
Number of amino acids:50
Molecular Weight:5763.49 Da
Theoretical pI:6.86


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)24%
Cysteine CYS (C)816%
Glutamic Acid GLU (E)24%
Aspartic Acid ASP (D)24%
Glycine GLY (G)48%
Phynylalanine PHE (F)36%
Isoleucine ILE (I)36%
Histidine HIS (H)24%
Lysine LYS (K)36%
Methionine MET (M)12%
Leucine LEU (L)00%
Asparagine ASN (N)510%
Glutamine GLN (Q)24%
Proline PRO (P)12%
Serine SER (S)48%
Arginine ARG (R)12%
Threonine THR (T)12%
Tryptophan TRP (W)24%
Valine VAL (V)12%
Tyrosine TYR (Y)36%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC247
HydrogenH355
NitrogenN69
OxygenO74
SulphurS9

FormulaC247H355N69O74S9
Total Number of Atoms:754


Total number of positively charged residues (ARG + LYS):4
Total number of negatively charged residues (ASP + GLU):4
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    15970
Absorption 0.1% (=1 g/l)    2.771,   assuming all pairs of CYS residues form cystines

Ext. coefficient    15470
Absorption 0.1% (=1 g/l)    2.684,   assuming all CYS residues are reduced
Aromaticity:0.160

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 32.80

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.00, 28.00, 10.00]

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):-0.45