Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4877
Number of amino acids:243
Molecular Weight:25835.34 Da
Theoretical pI:8.57


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2911.93%
Cysteine CYS (C)166.58%
Glutamic Acid GLU (E)31.23%
Aspartic Acid ASP (D)114.53%
Glycine GLY (G)187.41%
Phynylalanine PHE (F)124.94%
Isoleucine ILE (I)72.88%
Histidine HIS (H)10.41%
Lysine LYS (K)114.53%
Methionine MET (M)31.23%
Leucine LEU (L)166.58%
Asparagine ASN (N)124.94%
Glutamine GLN (Q)104.12%
Proline PRO (P)145.76%
Serine SER (S)197.82%
Arginine ARG (R)93.7%
Threonine THR (T)2711.11%
Tryptophan TRP (W)31.23%
Valine VAL (V)135.35%
Tyrosine TYR (Y)93.7%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1129
HydrogenH1754
NitrogenN308
OxygenO349
SulphurS19

FormulaC1129H1754N308O349S19
Total Number of Atoms:3559


Total number of positively charged residues (ARG + LYS):20
Total number of negatively charged residues (ASP + GLU):14
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    30910
Absorption 0.1% (=1 g/l)    1.196,   assuming all pairs of CYS residues form cystines

Ext. coefficient    29910
Absorption 0.1% (=1 g/l)    1.158,   assuming all CYS residues are reduced
Aromaticity:0.099

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.48

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.69, 25.93, 20.99]

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:64.3622
Grand average of hydropathicity (GRAVY):-0.05