Physicochemical Properties of Peptide



PPepDB ID:PPepDB_802
Number of amino acids:247
Molecular Weight:26341.17 Da
Theoretical pI:8.93


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)228.91%
Cysteine CYS (C)166.48%
Glutamic Acid GLU (E)20.81%
Aspartic Acid ASP (D)104.05%
Glycine GLY (G)2510.12%
Phynylalanine PHE (F)145.67%
Isoleucine ILE (I)93.64%
Histidine HIS (H)62.43%
Lysine LYS (K)114.45%
Methionine MET (M)41.62%
Leucine LEU (L)166.48%
Asparagine ASN (N)83.24%
Glutamine GLN (Q)52.02%
Proline PRO (P)176.88%
Serine SER (S)239.31%
Arginine ARG (R)114.45%
Threonine THR (T)218.5%
Tryptophan TRP (W)31.21%
Valine VAL (V)145.67%
Tyrosine TYR (Y)104.05%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1166
HydrogenH1789
NitrogenN319
OxygenO339
SulphurS20

FormulaC1166H1789N319O339S20
Total Number of Atoms:3633


Total number of positively charged residues (ARG + LYS):22
Total number of negatively charged residues (ASP + GLU):12
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)    1.230,   assuming all pairs of CYS residues form cystines

Ext. coefficient    31400
Absorption 0.1% (=1 g/l)    1.192,   assuming all CYS residues are reduced
Aromaticity:0.109

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.29

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.72, 29.55, 17.81]

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:64.8178
Grand average of hydropathicity (GRAVY):0.01