Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5087
Number of amino acids:304
Molecular Weight:33274.73 Da
Theoretical pI:8.67


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3210.53%
Cysteine CYS (C)51.64%
Glutamic Acid GLU (E)72.3%
Aspartic Acid ASP (D)196.25%
Glycine GLY (G)3210.53%
Phynylalanine PHE (F)113.62%
Isoleucine ILE (I)61.97%
Histidine HIS (H)113.62%
Lysine LYS (K)165.26%
Methionine MET (M)51.64%
Leucine LEU (L)3110.2%
Asparagine ASN (N)103.29%
Glutamine GLN (Q)61.97%
Proline PRO (P)165.26%
Serine SER (S)216.91%
Arginine ARG (R)144.61%
Threonine THR (T)165.26%
Tryptophan TRP (W)92.96%
Valine VAL (V)206.58%
Tyrosine TYR (Y)175.59%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1507
HydrogenH2275
NitrogenN409
OxygenO427
SulphurS10

FormulaC1507H2275N409O427S10
Total Number of Atoms:4628


Total number of positively charged residues (ARG + LYS):30
Total number of negatively charged residues (ASP + GLU):26
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    75080
Absorption 0.1% (=1 g/l)    2.256,   assuming all pairs of CYS residues form cystines

Ext. coefficient    74830
Absorption 0.1% (=1 g/l)    2.249,   assuming all CYS residues are reduced
Aromaticity:0.122

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.62

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.92, 25.99, 24.67]

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:77.0725
Grand average of hydropathicity (GRAVY):-0.21