Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4262
Number of amino acids:266
Molecular Weight:28155.66 Da
Theoretical pI:8.83


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)4115.41%
Cysteine CYS (C)72.63%
Glutamic Acid GLU (E)41.5%
Aspartic Acid ASP (D)145.26%
Glycine GLY (G)3212.03%
Phynylalanine PHE (F)134.89%
Isoleucine ILE (I)124.51%
Histidine HIS (H)51.88%
Lysine LYS (K)72.63%
Methionine MET (M)41.5%
Leucine LEU (L)103.76%
Asparagine ASN (N)83.01%
Glutamine GLN (Q)114.14%
Proline PRO (P)145.26%
Serine SER (S)176.39%
Arginine ARG (R)166.02%
Threonine THR (T)155.64%
Tryptophan TRP (W)62.26%
Valine VAL (V)186.77%
Tyrosine TYR (Y)124.51%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1253
HydrogenH1896
NitrogenN356
OxygenO366
SulphurS11

FormulaC1253H1896N356O366S11
Total Number of Atoms:3882


Total number of positively charged residues (ARG + LYS):23
Total number of negatively charged residues (ASP + GLU):18
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    51255
Absorption 0.1% (=1 g/l)    1.820,   assuming all pairs of CYS residues form cystines

Ext. coefficient    50880
Absorption 0.1% (=1 g/l)    1.807,   assuming all CYS residues are reduced
Aromaticity:0.117

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 31.62

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.69, 26.69, 22.18]

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:67.2932
Grand average of hydropathicity (GRAVY):-0.08