Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5836
Number of amino acids:266
Molecular Weight:28975.74 Da
Theoretical pI:8.37


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)217.89%
Cysteine CYS (C)93.38%
Glutamic Acid GLU (E)103.76%
Aspartic Acid ASP (D)114.14%
Glycine GLY (G)2710.15%
Phynylalanine PHE (F)134.89%
Isoleucine ILE (I)155.64%
Histidine HIS (H)41.5%
Lysine LYS (K)93.38%
Methionine MET (M)51.88%
Leucine LEU (L)176.39%
Asparagine ASN (N)155.64%
Glutamine GLN (Q)72.63%
Proline PRO (P)166.02%
Serine SER (S)269.77%
Arginine ARG (R)155.64%
Threonine THR (T)166.02%
Tryptophan TRP (W)72.63%
Valine VAL (V)145.26%
Tyrosine TYR (Y)93.38%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1285
HydrogenH1965
NitrogenN357
OxygenO382
SulphurS14

FormulaC1285H1965N357O382S14
Total Number of Atoms:4003


Total number of positively charged residues (ARG + LYS):24
Total number of negatively charged residues (ASP + GLU):21
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    52410
Absorption 0.1% (=1 g/l)    1.809,   assuming all pairs of CYS residues form cystines

Ext. coefficient    51910
Absorption 0.1% (=1 g/l)    1.792,   assuming all CYS residues are reduced
Aromaticity:0.109

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 43.21

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.20, 31.58, 19.92]

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:70.0752
Grand average of hydropathicity (GRAVY):-0.21