Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5627
Number of amino acids:77
Molecular Weight:8353.76 Da
Theoretical pI:6.7


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)911.69%
Cysteine CYS (C)67.79%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)56.49%
Glycine GLY (G)67.79%
Phynylalanine PHE (F)56.49%
Isoleucine ILE (I)45.19%
Histidine HIS (H)11.3%
Lysine LYS (K)33.9%
Methionine MET (M)33.9%
Leucine LEU (L)56.49%
Asparagine ASN (N)00%
Glutamine GLN (Q)79.09%
Proline PRO (P)33.9%
Serine SER (S)22.6%
Arginine ARG (R)22.6%
Threonine THR (T)79.09%
Tryptophan TRP (W)11.3%
Valine VAL (V)67.79%
Tyrosine TYR (Y)22.6%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC370
HydrogenH576
NitrogenN96
OxygenO106
SulphurS9

FormulaC370H576N96O106S9
Total Number of Atoms:1157


Total number of positively charged residues (ARG + LYS):5
Total number of negatively charged residues (ASP + GLU):5
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    8855
Absorption 0.1% (=1 g/l)    1.060,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8480
Absorption 0.1% (=1 g/l)    1.015,   assuming all CYS residues are reduced
Aromaticity:0.104

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 45.25

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.87, 14.29, 22.08]

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:79.8702
Grand average of hydropathicity (GRAVY):0.39