Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4469
Number of amino acids:433
Molecular Weight:49439.27 Da
Theoretical pI:5.97


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)163.7%
Cysteine CYS (C)112.54%
Glutamic Acid GLU (E)245.54%
Aspartic Acid ASP (D)173.93%
Glycine GLY (G)337.62%
Phynylalanine PHE (F)214.85%
Isoleucine ILE (I)388.78%
Histidine HIS (H)143.23%
Lysine LYS (K)204.62%
Methionine MET (M)112.54%
Leucine LEU (L)327.39%
Asparagine ASN (N)296.7%
Glutamine GLN (Q)133%
Proline PRO (P)296.7%
Serine SER (S)337.62%
Arginine ARG (R)133%
Threonine THR (T)214.85%
Tryptophan TRP (W)92.08%
Valine VAL (V)194.39%
Tyrosine TYR (Y)306.93%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2254
HydrogenH3365
NitrogenN571
OxygenO642
SulphurS22

FormulaC2254H3365N571O642S22
Total Number of Atoms:6854


Total number of positively charged residues (ARG + LYS):33
Total number of negatively charged residues (ASP + GLU):41
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    94825
Absorption 0.1% (=1 g/l)    1.918,   assuming all pairs of CYS residues form cystines

Ext. coefficient    94200
Absorption 0.1% (=1 g/l)    1.905,   assuming all CYS residues are reduced
Aromaticity:0.139

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 45.96

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.41, 28.64, 19.17]

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:79.4688
Grand average of hydropathicity (GRAVY):-0.26