Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4099
Number of amino acids:431
Molecular Weight:47770.79 Da
Theoretical pI:8.07


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)347.89%
Cysteine CYS (C)112.55%
Glutamic Acid GLU (E)133.02%
Aspartic Acid ASP (D)276.26%
Glycine GLY (G)378.58%
Phynylalanine PHE (F)143.25%
Isoleucine ILE (I)245.57%
Histidine HIS (H)235.34%
Lysine LYS (K)133.02%
Methionine MET (M)143.25%
Leucine LEU (L)266.03%
Asparagine ASN (N)296.73%
Glutamine GLN (Q)102.32%
Proline PRO (P)173.94%
Serine SER (S)337.66%
Arginine ARG (R)296.73%
Threonine THR (T)276.26%
Tryptophan TRP (W)112.55%
Valine VAL (V)296.73%
Tyrosine TYR (Y)102.32%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2082
HydrogenH3219
NitrogenN627
OxygenO621
SulphurS25

FormulaC2082H3219N627O621S25
Total Number of Atoms:6574


Total number of positively charged residues (ARG + LYS):42
Total number of negatively charged residues (ASP + GLU):40
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    76025
Absorption 0.1% (=1 g/l)    1.591,   assuming all pairs of CYS residues form cystines

Ext. coefficient    75400
Absorption 0.1% (=1 g/l)    1.578,   assuming all CYS residues are reduced
Aromaticity:0.081

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.91

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.45, 26.91, 20.19]

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:72.645
Grand average of hydropathicity (GRAVY):-0.37