Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2706
Number of amino acids:45
Molecular Weight:5375.3 Da
Theoretical pI:10.01


Amino Acid Composition:


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


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC241
HydrogenH391
NitrogenN69
OxygenO66
SulphurS2

FormulaC241H391N69O66S2
Total Number of Atoms:769


Total number of positively charged residues (ARG + LYS):10
Total number of negatively charged residues (ASP + GLU):5
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    1.023,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    1.023,   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 : 21.05

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.33, 13.33, 20.00]

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:84.4444
Grand average of hydropathicity (GRAVY):-0.48