Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4515
Number of amino acids:499
Molecular Weight:56329.07 Da
Theoretical pI:8.67


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)346.81%
Cysteine CYS (C)81.6%
Glutamic Acid GLU (E)224.41%
Aspartic Acid ASP (D)275.41%
Glycine GLY (G)346.81%
Phynylalanine PHE (F)285.61%
Isoleucine ILE (I)163.21%
Histidine HIS (H)122.4%
Lysine LYS (K)336.61%
Methionine MET (M)81.6%
Leucine LEU (L)489.62%
Asparagine ASN (N)255.01%
Glutamine GLN (Q)163.21%
Proline PRO (P)285.61%
Serine SER (S)408.02%
Arginine ARG (R)224.41%
Threonine THR (T)285.61%
Tryptophan TRP (W)122.4%
Valine VAL (V)346.81%
Tyrosine TYR (Y)244.81%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2560
HydrogenH3887
NitrogenN675
OxygenO731
SulphurS16

FormulaC2560H3887N675O731S16
Total Number of Atoms:7869


Total number of positively charged residues (ARG + LYS):55
Total number of negatively charged residues (ASP + GLU):49
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    102260
Absorption 0.1% (=1 g/l)    1.815,   assuming all pairs of CYS residues form cystines

Ext. coefficient    101760
Absorption 0.1% (=1 g/l)    1.807,   assuming all CYS residues are reduced
Aromaticity:0.128

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.19

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.46, 25.45, 22.44]

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:76.5932
Grand average of hydropathicity (GRAVY):-0.32