Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4388
Number of amino acids:442
Molecular Weight:48014.64 Da
Theoretical pI:5.75


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)388.6%
Cysteine CYS (C)30.68%
Glutamic Acid GLU (E)347.69%
Aspartic Acid ASP (D)214.75%
Glycine GLY (G)449.95%
Phynylalanine PHE (F)286.33%
Isoleucine ILE (I)173.85%
Histidine HIS (H)194.3%
Lysine LYS (K)296.56%
Methionine MET (M)112.49%
Leucine LEU (L)409.05%
Asparagine ASN (N)92.04%
Glutamine GLN (Q)132.94%
Proline PRO (P)214.75%
Serine SER (S)357.92%
Arginine ARG (R)122.71%
Threonine THR (T)184.07%
Tryptophan TRP (W)30.68%
Valine VAL (V)378.37%
Tyrosine TYR (Y)102.26%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2165
HydrogenH3344
NitrogenN570
OxygenO638
SulphurS14

FormulaC2165H3344N570O638S14
Total Number of Atoms:6731


Total number of positively charged residues (ARG + LYS):41
Total number of negatively charged residues (ASP + GLU):55
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    31525
Absorption 0.1% (=1 g/l)    0.657,   assuming all pairs of CYS residues form cystines

Ext. coefficient    31400
Absorption 0.1% (=1 g/l)    0.654,   assuming all CYS residues are reduced
Aromaticity:0.093

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.61

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.54, 24.66, 27.83]

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:83.1674
Grand average of hydropathicity (GRAVY):-0.10