Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4191
Number of amino acids:295
Molecular Weight:33882.41 Da
Theoretical pI:8.65


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)144.75%
Cysteine CYS (C)51.69%
Glutamic Acid GLU (E)93.05%
Aspartic Acid ASP (D)227.46%
Glycine GLY (G)237.8%
Phynylalanine PHE (F)186.1%
Isoleucine ILE (I)124.07%
Histidine HIS (H)62.03%
Lysine LYS (K)206.78%
Methionine MET (M)41.36%
Leucine LEU (L)258.47%
Asparagine ASN (N)124.07%
Glutamine GLN (Q)124.07%
Proline PRO (P)144.75%
Serine SER (S)227.46%
Arginine ARG (R)155.08%
Threonine THR (T)175.76%
Tryptophan TRP (W)103.39%
Valine VAL (V)196.44%
Tyrosine TYR (Y)165.42%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1547
HydrogenH2316
NitrogenN406
OxygenO437
SulphurS9

FormulaC1547H2316N406O437S9
Total Number of Atoms:4715


Total number of positively charged residues (ARG + LYS):35
Total number of negatively charged residues (ASP + GLU):31
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    79090
Absorption 0.1% (=1 g/l)    2.334,   assuming all pairs of CYS residues form cystines

Ext. coefficient    78840
Absorption 0.1% (=1 g/l)    2.327,   assuming all CYS residues are reduced
Aromaticity:0.149

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.25

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.90, 24.07, 17.63]

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:72.339
Grand average of hydropathicity (GRAVY):-0.42