Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1335
Number of amino acids:244
Molecular Weight:25669.41 Da
Theoretical pI:7.39


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)166.56%
Cysteine CYS (C)176.97%
Glutamic Acid GLU (E)83.28%
Aspartic Acid ASP (D)83.28%
Glycine GLY (G)2911.89%
Phynylalanine PHE (F)104.1%
Isoleucine ILE (I)124.92%
Histidine HIS (H)41.64%
Lysine LYS (K)104.1%
Methionine MET (M)41.64%
Leucine LEU (L)218.61%
Asparagine ASN (N)135.33%
Glutamine GLN (Q)72.87%
Proline PRO (P)156.15%
Serine SER (S)2610.66%
Arginine ARG (R)72.87%
Threonine THR (T)104.1%
Tryptophan TRP (W)31.23%
Valine VAL (V)176.97%
Tyrosine TYR (Y)72.87%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1124
HydrogenH1756
NitrogenN306
OxygenO340
SulphurS21

FormulaC1124H1756N306O340S21
Total Number of Atoms:3547


Total number of positively charged residues (ARG + LYS):17
Total number of negatively charged residues (ASP + GLU):16
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    27930
Absorption 0.1% (=1 g/l)    1.088,   assuming all pairs of CYS residues form cystines

Ext. coefficient    26930
Absorption 0.1% (=1 g/l)    1.049,   assuming all CYS residues are reduced
Aromaticity:0.082

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 41.91

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.69, 34.02, 20.08]

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:79.5082
Grand average of hydropathicity (GRAVY):0.11