Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5041
Number of amino acids:224
Molecular Weight:23479.09 Da
Theoretical pI:6.09


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)208.93%
Cysteine CYS (C)20.89%
Glutamic Acid GLU (E)94.02%
Aspartic Acid ASP (D)104.46%
Glycine GLY (G)229.82%
Phynylalanine PHE (F)135.8%
Isoleucine ILE (I)62.68%
Histidine HIS (H)41.79%
Lysine LYS (K)114.91%
Methionine MET (M)62.68%
Leucine LEU (L)2511.16%
Asparagine ASN (N)114.91%
Glutamine GLN (Q)31.34%
Proline PRO (P)188.04%
Serine SER (S)188.04%
Arginine ARG (R)62.68%
Threonine THR (T)135.8%
Tryptophan TRP (W)10.45%
Valine VAL (V)2410.71%
Tyrosine TYR (Y)20.89%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1058
HydrogenH1676
NitrogenN276
OxygenO310
SulphurS8

FormulaC1058H1676N276O310S8
Total Number of Atoms:3328


Total number of positively charged residues (ARG + LYS):17
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    8605
Absorption 0.1% (=1 g/l)    0.366,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8480
Absorption 0.1% (=1 g/l)    0.361,   assuming all CYS residues are reduced
Aromaticity:0.071

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 16.23

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.70, 30.80, 26.79]

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:93.9732
Grand average of hydropathicity (GRAVY):0.22