Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4620
Number of amino acids:494
Molecular Weight:54079.36 Da
Theoretical pI:5.33


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)418.3%
Cysteine CYS (C)112.23%
Glutamic Acid GLU (E)163.24%
Aspartic Acid ASP (D)316.28%
Glycine GLY (G)387.69%
Phynylalanine PHE (F)193.85%
Isoleucine ILE (I)142.83%
Histidine HIS (H)132.63%
Lysine LYS (K)173.44%
Methionine MET (M)91.82%
Leucine LEU (L)5010.12%
Asparagine ASN (N)255.06%
Glutamine GLN (Q)204.05%
Proline PRO (P)234.66%
Serine SER (S)5611.34%
Arginine ARG (R)163.24%
Threonine THR (T)295.87%
Tryptophan TRP (W)71.42%
Valine VAL (V)295.87%
Tyrosine TYR (Y)306.07%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2403
HydrogenH3641
NitrogenN637
OxygenO749
SulphurS20

FormulaC2403H3641N637O749S20
Total Number of Atoms:7450


Total number of positively charged residues (ARG + LYS):33
Total number of negatively charged residues (ASP + GLU):47
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    83825
Absorption 0.1% (=1 g/l)    1.550,   assuming all pairs of CYS residues form cystines

Ext. coefficient    83200
Absorption 0.1% (=1 g/l)    1.538,   assuming all CYS residues are reduced
Aromaticity:0.113

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.99

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.16, 28.74, 23.48]

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:75.8504
Grand average of hydropathicity (GRAVY):-0.24