Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6159
Number of amino acids:255
Molecular Weight:27714.76 Da
Theoretical pI:9.58


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)218.24%
Cysteine CYS (C)83.14%
Glutamic Acid GLU (E)31.18%
Aspartic Acid ASP (D)72.75%
Glycine GLY (G)2810.98%
Phynylalanine PHE (F)166.27%
Isoleucine ILE (I)145.49%
Histidine HIS (H)20.78%
Lysine LYS (K)187.06%
Methionine MET (M)83.14%
Leucine LEU (L)166.27%
Asparagine ASN (N)197.45%
Glutamine GLN (Q)93.53%
Proline PRO (P)93.53%
Serine SER (S)259.8%
Arginine ARG (R)72.75%
Threonine THR (T)166.27%
Tryptophan TRP (W)72.75%
Valine VAL (V)124.71%
Tyrosine TYR (Y)103.92%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1244
HydrogenH1901
NitrogenN333
OxygenO355
SulphurS16

FormulaC1244H1901N333O355S16
Total Number of Atoms:3849


Total number of positively charged residues (ARG + LYS):25
Total number of negatively charged residues (ASP + GLU):10
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    53900
Absorption 0.1% (=1 g/l)    1.945,   assuming all pairs of CYS residues form cystines

Ext. coefficient    53400
Absorption 0.1% (=1 g/l)    1.927,   assuming all CYS residues are reduced
Aromaticity:0.129

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.54

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.41, 31.76, 18.82]

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:67.7647
Grand average of hydropathicity (GRAVY):-0.10