Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4316
Number of amino acids:496
Molecular Weight:54089.89 Da
Theoretical pI:5.78


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)336.65%
Cysteine CYS (C)153.02%
Glutamic Acid GLU (E)234.64%
Aspartic Acid ASP (D)285.65%
Glycine GLY (G)459.07%
Phynylalanine PHE (F)234.64%
Isoleucine ILE (I)306.05%
Histidine HIS (H)91.81%
Lysine LYS (K)316.25%
Methionine MET (M)112.22%
Leucine LEU (L)479.48%
Asparagine ASN (N)224.44%
Glutamine GLN (Q)193.83%
Proline PRO (P)214.23%
Serine SER (S)438.67%
Arginine ARG (R)132.62%
Threonine THR (T)255.04%
Tryptophan TRP (W)71.41%
Valine VAL (V)357.06%
Tyrosine TYR (Y)163.23%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2416
HydrogenH3772
NitrogenN632
OxygenO724
SulphurS26

FormulaC2416H3772N632O724S26
Total Number of Atoms:7570


Total number of positively charged residues (ARG + LYS):44
Total number of negatively charged residues (ASP + GLU):51
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    63215
Absorption 0.1% (=1 g/l)    1.169,   assuming all pairs of CYS residues form cystines

Ext. coefficient    62340
Absorption 0.1% (=1 g/l)    1.153,   assuming all CYS residues are reduced
Aromaticity:0.093

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.33

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.85, 26.41, 22.98]

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:87.6613
Grand average of hydropathicity (GRAVY):-0.04