Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2257
Number of amino acids:8
Molecular Weight:948.05 Da
Theoretical pI:5.24


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)112.5%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)00%
Glycine GLY (G)00%
Phynylalanine PHE (F)112.5%
Isoleucine ILE (I)112.5%
Histidine HIS (H)00%
Lysine LYS (K)00%
Methionine MET (M)00%
Leucine LEU (L)00%
Asparagine ASN (N)225%
Glutamine GLN (Q)00%
Proline PRO (P)112.5%
Serine SER (S)112.5%
Arginine ARG (R)00%
Threonine THR (T)00%
Tryptophan TRP (W)112.5%
Valine VAL (V)00%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC45
HydrogenH61
NitrogenN11
OxygenO12
SulphurS0

FormulaC45H61N11O12S0
Total Number of Atoms:129


Total number of positively charged residues (ARG + LYS):0
Total number of negatively charged residues (ASP + GLU):0
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    5.801
Aromaticity:0.250

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 158.10

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[37.50, 50.00, 12.50]

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:61.25
Grand average of hydropathicity (GRAVY):-0.15