Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4483
Number of amino acids:159
Molecular Weight:17519.73 Da
Theoretical pI:8.86


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1610.06%
Cysteine CYS (C)85.03%
Glutamic Acid GLU (E)31.89%
Aspartic Acid ASP (D)63.77%
Glycine GLY (G)1710.69%
Phynylalanine PHE (F)42.52%
Isoleucine ILE (I)53.14%
Histidine HIS (H)42.52%
Lysine LYS (K)31.89%
Methionine MET (M)31.89%
Leucine LEU (L)127.55%
Asparagine ASN (N)159.43%
Glutamine GLN (Q)85.03%
Proline PRO (P)53.14%
Serine SER (S)116.92%
Arginine ARG (R)116.92%
Threonine THR (T)42.52%
Tryptophan TRP (W)63.77%
Valine VAL (V)116.92%
Tyrosine TYR (Y)74.4%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC764
HydrogenH1164
NitrogenN232
OxygenO223
SulphurS11

FormulaC764H1164N232O223S11
Total Number of Atoms:2394


Total number of positively charged residues (ARG + LYS):14
Total number of negatively charged residues (ASP + GLU):9
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    43930
Absorption 0.1% (=1 g/l)    2.507,   assuming all pairs of CYS residues form cystines

Ext. coefficient    43430
Absorption 0.1% (=1 g/l)    2.479,   assuming all CYS residues are reduced
Aromaticity:0.107

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 41.13

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.30, 30.19, 21.38]

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:71.8239
Grand average of hydropathicity (GRAVY):-0.29