Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5224
Number of amino acids:674
Molecular Weight:73353.18 Da
Theoretical pI:5.87


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)334.9%
Cysteine CYS (C)131.93%
Glutamic Acid GLU (E)497.27%
Aspartic Acid ASP (D)284.15%
Glycine GLY (G)639.35%
Phynylalanine PHE (F)284.15%
Isoleucine ILE (I)284.15%
Histidine HIS (H)142.08%
Lysine LYS (K)395.79%
Methionine MET (M)142.08%
Leucine LEU (L)9814.54%
Asparagine ASN (N)345.04%
Glutamine GLN (Q)162.37%
Proline PRO (P)345.04%
Serine SER (S)7210.68%
Arginine ARG (R)284.15%
Threonine THR (T)213.12%
Tryptophan TRP (W)60.89%
Valine VAL (V)456.68%
Tyrosine TYR (Y)111.63%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3261
HydrogenH5211
NitrogenN881
OxygenO983
SulphurS27

FormulaC3261H5211N881O983S27
Total Number of Atoms:10363


Total number of positively charged residues (ARG + LYS):67
Total number of negatively charged residues (ASP + GLU):77
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    50140
Absorption 0.1% (=1 g/l)    0.684,   assuming all pairs of CYS residues form cystines

Ext. coefficient    49390
Absorption 0.1% (=1 g/l)    0.673,   assuming all CYS residues are reduced
Aromaticity:0.067

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 45.33

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.05, 30.12, 28.78]

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:97.1663
Grand average of hydropathicity (GRAVY):-0.08