Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1362
Number of amino acids:249
Molecular Weight:27486.05 Da
Theoretical pI:6.89


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)124.82%
Cysteine CYS (C)176.83%
Glutamic Acid GLU (E)83.21%
Aspartic Acid ASP (D)104.02%
Glycine GLY (G)2811.25%
Phynylalanine PHE (F)156.02%
Isoleucine ILE (I)72.81%
Histidine HIS (H)52.01%
Lysine LYS (K)83.21%
Methionine MET (M)52.01%
Leucine LEU (L)135.22%
Asparagine ASN (N)145.62%
Glutamine GLN (Q)93.61%
Proline PRO (P)228.84%
Serine SER (S)135.22%
Arginine ARG (R)104.02%
Threonine THR (T)249.64%
Tryptophan TRP (W)93.61%
Valine VAL (V)114.42%
Tyrosine TYR (Y)93.61%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1222
HydrogenH1801
NitrogenN329
OxygenO355
SulphurS22

FormulaC1222H1801N329O355S22
Total Number of Atoms:3729


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

Ext. coefficient    63910
Absorption 0.1% (=1 g/l)    2.325,   assuming all pairs of CYS residues form cystines

Ext. coefficient    62910
Absorption 0.1% (=1 g/l)    2.289,   assuming all CYS residues are reduced
Aromaticity:0.133

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.31

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.70, 30.92, 15.26]

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:48.9558
Grand average of hydropathicity (GRAVY):-0.35