Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4708
Number of amino acids:500
Molecular Weight:55334.08 Da
Theoretical pI:5.89


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)499.8%
Cysteine CYS (C)102%
Glutamic Acid GLU (E)275.4%
Aspartic Acid ASP (D)316.2%
Glycine GLY (G)448.8%
Phynylalanine PHE (F)306%
Isoleucine ILE (I)244.8%
Histidine HIS (H)122.4%
Lysine LYS (K)285.6%
Methionine MET (M)132.6%
Leucine LEU (L)479.4%
Asparagine ASN (N)244.8%
Glutamine GLN (Q)122.4%
Proline PRO (P)244.8%
Serine SER (S)285.6%
Arginine ARG (R)224.4%
Threonine THR (T)214.2%
Tryptophan TRP (W)71.4%
Valine VAL (V)275.4%
Tyrosine TYR (Y)204%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2493
HydrogenH3813
NitrogenN661
OxygenO722
SulphurS23

FormulaC2493H3813N661O722S23
Total Number of Atoms:7712


Total number of positively charged residues (ARG + LYS):50
Total number of negatively charged residues (ASP + GLU):58
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    68925
Absorption 0.1% (=1 g/l)    1.246,   assuming all pairs of CYS residues form cystines

Ext. coefficient    68300
Absorption 0.1% (=1 g/l)    1.234,   assuming all CYS residues are reduced
Aromaticity:0.114

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 38.09

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.00, 24.00, 27.20]

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:80.84
Grand average of hydropathicity (GRAVY):-0.16