Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5196
Number of amino acids:220
Molecular Weight:24190.11 Da
Theoretical pI:6.44


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)62.73%
Cysteine CYS (C)94.09%
Glutamic Acid GLU (E)62.73%
Aspartic Acid ASP (D)125.45%
Glycine GLY (G)188.18%
Phynylalanine PHE (F)146.36%
Isoleucine ILE (I)146.36%
Histidine HIS (H)00%
Lysine LYS (K)104.55%
Methionine MET (M)31.36%
Leucine LEU (L)2812.73%
Asparagine ASN (N)156.82%
Glutamine GLN (Q)62.73%
Proline PRO (P)188.18%
Serine SER (S)177.73%
Arginine ARG (R)83.64%
Threonine THR (T)104.55%
Tryptophan TRP (W)10.45%
Valine VAL (V)177.73%
Tyrosine TYR (Y)83.64%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1099
HydrogenH1718
NitrogenN276
OxygenO313
SulphurS12

FormulaC1099H1718N276O313S12
Total Number of Atoms:3418


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    17920
Absorption 0.1% (=1 g/l)    0.741,   assuming all pairs of CYS residues form cystines

Ext. coefficient    17420
Absorption 0.1% (=1 g/l)    0.720,   assuming all CYS residues are reduced
Aromaticity:0.105

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 32.85

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[37.27, 30.91, 19.55]

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:99.591
Grand average of hydropathicity (GRAVY):0.18