Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4657
Number of amino acids:457
Molecular Weight:50442.86 Da
Theoretical pI:8.82


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)367.88%
Cysteine CYS (C)214.6%
Glutamic Acid GLU (E)61.31%
Aspartic Acid ASP (D)183.94%
Glycine GLY (G)327%
Phynylalanine PHE (F)224.81%
Isoleucine ILE (I)173.72%
Histidine HIS (H)71.53%
Lysine LYS (K)255.47%
Methionine MET (M)122.63%
Leucine LEU (L)347.44%
Asparagine ASN (N)327%
Glutamine GLN (Q)224.81%
Proline PRO (P)337.22%
Serine SER (S)296.35%
Arginine ARG (R)112.41%
Threonine THR (T)398.53%
Tryptophan TRP (W)143.06%
Valine VAL (V)296.35%
Tyrosine TYR (Y)183.94%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2266
HydrogenH3443
NitrogenN597
OxygenO646
SulphurS33

FormulaC2266H3443N597O646S33
Total Number of Atoms:6985


Total number of positively charged residues (ARG + LYS):36
Total number of negatively charged residues (ASP + GLU):24
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    105070
Absorption 0.1% (=1 g/l)    2.083,   assuming all pairs of CYS residues form cystines

Ext. coefficient    103820
Absorption 0.1% (=1 g/l)    2.058,   assuming all CYS residues are reduced
Aromaticity:0.118

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.09

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.32, 27.57, 19.26]

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:69.803
Grand average of hydropathicity (GRAVY):-0.14