Physicochemical Properties of Peptide



PPepDB ID:PPepDB_825
Number of amino acids:93
Molecular Weight:10083.04 Da
Theoretical pI:6.54


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)99.68%
Cysteine CYS (C)77.53%
Glutamic Acid GLU (E)77.53%
Aspartic Acid ASP (D)22.15%
Glycine GLY (G)77.53%
Phynylalanine PHE (F)44.3%
Isoleucine ILE (I)1010.75%
Histidine HIS (H)11.08%
Lysine LYS (K)77.53%
Methionine MET (M)33.23%
Leucine LEU (L)99.68%
Asparagine ASN (N)11.08%
Glutamine GLN (Q)22.15%
Proline PRO (P)33.23%
Serine SER (S)88.6%
Arginine ARG (R)22.15%
Threonine THR (T)22.15%
Tryptophan TRP (W)22.15%
Valine VAL (V)66.45%
Tyrosine TYR (Y)11.08%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC452
HydrogenH729
NitrogenN113
OxygenO126
SulphurS10

FormulaC452H729N113O126S10
Total Number of Atoms:1430


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):9
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    12865
Absorption 0.1% (=1 g/l)    1.276,   assuming all pairs of CYS residues form cystines

Ext. coefficient    12490
Absorption 0.1% (=1 g/l)    1.239,   assuming all CYS residues are reduced
Aromaticity:0.075

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 24.44

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.41, 20.43, 30.11]

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:108.065
Grand average of hydropathicity (GRAVY):0.59