Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2815
Number of amino acids:48
Molecular Weight:5316.26 Da
Theoretical pI:8.75


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)24.17%
Cysteine CYS (C)816.67%
Glutamic Acid GLU (E)12.08%
Aspartic Acid ASP (D)24.17%
Glycine GLY (G)816.67%
Phynylalanine PHE (F)12.08%
Isoleucine ILE (I)12.08%
Histidine HIS (H)00%
Lysine LYS (K)36.25%
Methionine MET (M)36.25%
Leucine LEU (L)24.17%
Asparagine ASN (N)24.17%
Glutamine GLN (Q)510.42%
Proline PRO (P)00%
Serine SER (S)12.08%
Arginine ARG (R)48.33%
Threonine THR (T)00%
Tryptophan TRP (W)24.17%
Valine VAL (V)36.25%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC216
HydrogenH350
NitrogenN72
OxygenO63
SulphurS11

FormulaC216H350N72O63S11
Total Number of Atoms:712


Total number of positively charged residues (ARG + LYS):7
Total number of negatively charged residues (ASP + GLU):3
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    11500
Absorption 0.1% (=1 g/l)    2.163,   assuming all pairs of CYS residues form cystines

Ext. coefficient    11000
Absorption 0.1% (=1 g/l)    2.069,   assuming all CYS residues are reduced
Aromaticity:0.062

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 43.22

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[18.75, 22.92, 16.67]

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:46.6667
Grand average of hydropathicity (GRAVY):-0.28