Physicochemical Properties of Peptide



PPepDB ID:PPepDB_650
Number of amino acids:206
Molecular Weight:22074.71 Da
Theoretical pI:8.16


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2110.19%
Cysteine CYS (C)167.77%
Glutamic Acid GLU (E)41.94%
Aspartic Acid ASP (D)125.83%
Glycine GLY (G)2210.68%
Phynylalanine PHE (F)125.83%
Isoleucine ILE (I)41.94%
Histidine HIS (H)10.49%
Lysine LYS (K)62.91%
Methionine MET (M)00%
Leucine LEU (L)73.4%
Asparagine ASN (N)136.31%
Glutamine GLN (Q)73.4%
Proline PRO (P)146.8%
Serine SER (S)125.83%
Arginine ARG (R)136.31%
Threonine THR (T)146.8%
Tryptophan TRP (W)31.46%
Valine VAL (V)167.77%
Tyrosine TYR (Y)94.37%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC960
HydrogenH1450
NitrogenN276
OxygenO294
SulphurS16

FormulaC960H1450N276O294S16
Total Number of Atoms:2996


Total number of positively charged residues (ARG + LYS):19
Total number of negatively charged residues (ASP + GLU):16
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)    1.400,   assuming all pairs of CYS residues form cystines

Ext. coefficient    29910
Absorption 0.1% (=1 g/l)    1.355,   assuming all CYS residues are reduced
Aromaticity:0.117

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.19

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.76, 29.61, 15.53]

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:53.5437
Grand average of hydropathicity (GRAVY):-0.26