Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1226
Number of amino acids:247
Molecular Weight:26664.93 Da
Theoretical pI:7.85


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)176.88%
Cysteine CYS (C)166.48%
Glutamic Acid GLU (E)52.02%
Aspartic Acid ASP (D)114.45%
Glycine GLY (G)2710.93%
Phynylalanine PHE (F)145.67%
Isoleucine ILE (I)83.24%
Histidine HIS (H)10.4%
Lysine LYS (K)41.62%
Methionine MET (M)31.21%
Leucine LEU (L)135.26%
Asparagine ASN (N)176.88%
Glutamine GLN (Q)104.05%
Proline PRO (P)218.5%
Serine SER (S)166.48%
Arginine ARG (R)145.67%
Threonine THR (T)249.72%
Tryptophan TRP (W)52.02%
Valine VAL (V)124.86%
Tyrosine TYR (Y)93.64%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1166
HydrogenH1761
NitrogenN327
OxygenO356
SulphurS19

FormulaC1166H1761N327O356S19
Total Number of Atoms:3629


Total number of positively charged residues (ARG + LYS):18
Total number of negatively charged residues (ASP + GLU):16
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    41910
Absorption 0.1% (=1 g/l)    1.572,   assuming all pairs of CYS residues form cystines

Ext. coefficient    40910
Absorption 0.1% (=1 g/l)    1.534,   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 : 40.92

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.70, 32.79, 15.38]

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:54.1296
Grand average of hydropathicity (GRAVY):-0.29