Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5407
Number of amino acids:249
Molecular Weight:26366.77 Da
Theoretical pI:5.03


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)187.23%
Cysteine CYS (C)20.8%
Glutamic Acid GLU (E)41.61%
Aspartic Acid ASP (D)156.02%
Glycine GLY (G)156.02%
Phynylalanine PHE (F)124.82%
Isoleucine ILE (I)114.42%
Histidine HIS (H)31.2%
Lysine LYS (K)104.02%
Methionine MET (M)31.2%
Leucine LEU (L)2510.04%
Asparagine ASN (N)145.62%
Glutamine GLN (Q)135.22%
Proline PRO (P)197.63%
Serine SER (S)3112.45%
Arginine ARG (R)41.61%
Threonine THR (T)218.43%
Tryptophan TRP (W)10.4%
Valine VAL (V)239.24%
Tyrosine TYR (Y)52.01%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1175
HydrogenH1855
NitrogenN305
OxygenO372
SulphurS5

FormulaC1175H1855N305O372S5
Total Number of Atoms:3712


Total number of positively charged residues (ARG + LYS):14
Total number of negatively charged residues (ASP + GLU):19
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    13075
Absorption 0.1% (=1 g/l)    0.496,   assuming all pairs of CYS residues form cystines

Ext. coefficient    12950
Absorption 0.1% (=1 g/l)    0.491,   assuming all CYS residues are reduced
Aromaticity:0.072

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 38.12

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.92, 31.73, 20.08]

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:90.4018
Grand average of hydropathicity (GRAVY):0.03