Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4935
Number of amino acids:269
Molecular Weight:30755.67 Da
Theoretical pI:8.39


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)145.2%
Cysteine CYS (C)20.74%
Glutamic Acid GLU (E)93.35%
Aspartic Acid ASP (D)176.32%
Glycine GLY (G)186.69%
Phynylalanine PHE (F)186.69%
Isoleucine ILE (I)124.46%
Histidine HIS (H)41.49%
Lysine LYS (K)197.06%
Methionine MET (M)82.97%
Leucine LEU (L)207.43%
Asparagine ASN (N)186.69%
Glutamine GLN (Q)114.09%
Proline PRO (P)124.46%
Serine SER (S)238.55%
Arginine ARG (R)93.35%
Threonine THR (T)238.55%
Tryptophan TRP (W)93.35%
Valine VAL (V)114.09%
Tyrosine TYR (Y)124.46%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1393
HydrogenH2087
NitrogenN361
OxygenO409
SulphurS10

FormulaC1393H2087N361O409S10
Total Number of Atoms:4260


Total number of positively charged residues (ARG + LYS):28
Total number of negatively charged residues (ASP + GLU):26
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    67505
Absorption 0.1% (=1 g/l)    2.195,   assuming all pairs of CYS residues form cystines

Ext. coefficient    67380
Absorption 0.1% (=1 g/l)    2.191,   assuming all CYS residues are reduced
Aromaticity:0.145

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 32.96

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.48, 26.39, 18.96]

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:63.4572
Grand average of hydropathicity (GRAVY):-0.49