Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4298
Number of amino acids:254
Molecular Weight:29065.22 Da
Theoretical pI:8.75


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)187.09%
Cysteine CYS (C)31.18%
Glutamic Acid GLU (E)166.3%
Aspartic Acid ASP (D)114.33%
Glycine GLY (G)176.69%
Phynylalanine PHE (F)124.72%
Isoleucine ILE (I)145.51%
Histidine HIS (H)72.76%
Lysine LYS (K)218.27%
Methionine MET (M)41.57%
Leucine LEU (L)218.27%
Asparagine ASN (N)135.12%
Glutamine GLN (Q)93.54%
Proline PRO (P)124.72%
Serine SER (S)124.72%
Arginine ARG (R)103.94%
Threonine THR (T)166.3%
Tryptophan TRP (W)51.97%
Valine VAL (V)176.69%
Tyrosine TYR (Y)166.3%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1328
HydrogenH2028
NitrogenN346
OxygenO375
SulphurS7

FormulaC1328H2028N346O375S7
Total Number of Atoms:4084


Total number of positively charged residues (ARG + LYS):31
Total number of negatively charged residues (ASP + GLU):27
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    51465
Absorption 0.1% (=1 g/l)    1.771,   assuming all pairs of CYS residues form cystines

Ext. coefficient    51340
Absorption 0.1% (=1 g/l)    1.766,   assuming all CYS residues are reduced
Aromaticity:0.130

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.88

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.46, 21.26, 23.23]

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:80.2362
Grand average of hydropathicity (GRAVY):-0.38