Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4243
Number of amino acids:484
Molecular Weight:54447.71 Da
Theoretical pI:5.88


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)265.37%
Cysteine CYS (C)51.03%
Glutamic Acid GLU (E)459.3%
Aspartic Acid ASP (D)163.31%
Glycine GLY (G)336.82%
Phynylalanine PHE (F)142.89%
Isoleucine ILE (I)265.37%
Histidine HIS (H)112.27%
Lysine LYS (K)142.89%
Methionine MET (M)10.21%
Leucine LEU (L)489.92%
Asparagine ASN (N)316.4%
Glutamine GLN (Q)387.85%
Proline PRO (P)295.99%
Serine SER (S)418.47%
Arginine ARG (R)398.06%
Threonine THR (T)224.55%
Tryptophan TRP (W)30.62%
Valine VAL (V)295.99%
Tyrosine TYR (Y)132.69%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2372
HydrogenH3773
NitrogenN709
OxygenO752
SulphurS6

FormulaC2372H3773N709O752S6
Total Number of Atoms:7612


Total number of positively charged residues (ARG + LYS):53
Total number of negatively charged residues (ASP + GLU):61
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    36120
Absorption 0.1% (=1 g/l)    0.663,   assuming all pairs of CYS residues form cystines

Ext. coefficient    35870
Absorption 0.1% (=1 g/l)    0.659,   assuming all CYS residues are reduced
Aromaticity:0.062

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 61.80

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.48, 27.69, 24.79]

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:82.3761
Grand average of hydropathicity (GRAVY):-0.67