Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1068
Number of amino acids:255
Molecular Weight:27052.98 Da
Theoretical pI:7.38


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)228.63%
Cysteine CYS (C)166.27%
Glutamic Acid GLU (E)62.35%
Aspartic Acid ASP (D)145.49%
Glycine GLY (G)259.8%
Phynylalanine PHE (F)135.1%
Isoleucine ILE (I)103.92%
Histidine HIS (H)31.18%
Lysine LYS (K)135.1%
Methionine MET (M)31.18%
Leucine LEU (L)239.02%
Asparagine ASN (N)83.14%
Glutamine GLN (Q)31.18%
Proline PRO (P)166.27%
Serine SER (S)249.41%
Arginine ARG (R)83.14%
Threonine THR (T)207.84%
Tryptophan TRP (W)31.18%
Valine VAL (V)155.88%
Tyrosine TYR (Y)103.92%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1201
HydrogenH1858
NitrogenN312
OxygenO361
SulphurS19

FormulaC1201H1858N312O361S19
Total Number of Atoms:3751


Total number of positively charged residues (ARG + LYS):21
Total number of negatively charged residues (ASP + GLU):20
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    32400
Absorption 0.1% (=1 g/l)    1.198,   assuming all pairs of CYS residues form cystines

Ext. coefficient    31400
Absorption 0.1% (=1 g/l)    1.161,   assuming all CYS residues are reduced
Aromaticity:0.102

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.73

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.02, 28.63, 21.18]

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:76.1569
Grand average of hydropathicity (GRAVY):0.11