Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4014
Number of amino acids:438
Molecular Weight:48591.54 Da
Theoretical pI:5.76


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)388.68%
Cysteine CYS (C)71.6%
Glutamic Acid GLU (E)143.2%
Aspartic Acid ASP (D)378.45%
Glycine GLY (G)429.59%
Phynylalanine PHE (F)163.65%
Isoleucine ILE (I)245.48%
Histidine HIS (H)173.88%
Lysine LYS (K)214.79%
Methionine MET (M)92.05%
Leucine LEU (L)317.08%
Asparagine ASN (N)194.34%
Glutamine GLN (Q)153.42%
Proline PRO (P)204.57%
Serine SER (S)306.85%
Arginine ARG (R)184.11%
Threonine THR (T)194.34%
Tryptophan TRP (W)163.65%
Valine VAL (V)286.39%
Tyrosine TYR (Y)173.88%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2178
HydrogenH3275
NitrogenN597
OxygenO641
SulphurS16

FormulaC2178H3275N597O641S16
Total Number of Atoms:6707


Total number of positively charged residues (ARG + LYS):39
Total number of negatively charged residues (ASP + GLU):51
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    113705
Absorption 0.1% (=1 g/l)    2.340,   assuming all pairs of CYS residues form cystines

Ext. coefficient    113330
Absorption 0.1% (=1 g/l)    2.332,   assuming all CYS residues are reduced
Aromaticity:0.112

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 28.56

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.14, 25.34, 21.00]

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:76.1872
Grand average of hydropathicity (GRAVY):-0.33