Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4297
Number of amino acids:1295
Molecular Weight:143575.83 Da
Theoretical pI:7.76


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1058.11%
Cysteine CYS (C)201.54%
Glutamic Acid GLU (E)685.25%
Aspartic Acid ASP (D)604.63%
Glycine GLY (G)806.18%
Phynylalanine PHE (F)634.86%
Isoleucine ILE (I)896.87%
Histidine HIS (H)151.16%
Lysine LYS (K)705.41%
Methionine MET (M)322.47%
Leucine LEU (L)15912.28%
Asparagine ASN (N)473.63%
Glutamine GLN (Q)433.32%
Proline PRO (P)463.55%
Serine SER (S)1088.34%
Arginine ARG (R)604.63%
Threonine THR (T)745.71%
Tryptophan TRP (W)221.7%
Valine VAL (V)997.64%
Tyrosine TYR (Y)352.7%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC6505
HydrogenH10323
NitrogenN1687
OxygenO1859
SulphurS52

FormulaC6505H10323N1687O1859S52
Total Number of Atoms:20426


Total number of positively charged residues (ARG + LYS):130
Total number of negatively charged residues (ASP + GLU):128
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    174400
Absorption 0.1% (=1 g/l)    1.215,   assuming all pairs of CYS residues form cystines

Ext. coefficient    173150
Absorption 0.1% (=1 g/l)    1.206,   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 : 36.42

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[36.06, 21.70, 28.11]

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:104.965
Grand average of hydropathicity (GRAVY):0.18