Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1029
Number of amino acids:245
Molecular Weight:25702.48 Da
Theoretical pI:7.82


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)197.76%
Cysteine CYS (C)176.94%
Glutamic Acid GLU (E)62.45%
Aspartic Acid ASP (D)114.49%
Glycine GLY (G)2811.43%
Phynylalanine PHE (F)114.49%
Isoleucine ILE (I)93.67%
Histidine HIS (H)41.63%
Lysine LYS (K)145.71%
Methionine MET (M)41.63%
Leucine LEU (L)208.16%
Asparagine ASN (N)114.49%
Glutamine GLN (Q)72.86%
Proline PRO (P)166.53%
Serine SER (S)249.8%
Arginine ARG (R)52.04%
Threonine THR (T)114.49%
Tryptophan TRP (W)31.22%
Valine VAL (V)187.35%
Tyrosine TYR (Y)72.86%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1130
HydrogenH1759
NitrogenN303
OxygenO340
SulphurS21

FormulaC1130H1759N303O340S21
Total Number of Atoms:3553


Total number of positively charged residues (ARG + LYS):19
Total number of negatively charged residues (ASP + GLU):17
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    27930
Absorption 0.1% (=1 g/l)    1.087,   assuming all pairs of CYS residues form cystines

Ext. coefficient    26930
Absorption 0.1% (=1 g/l)    1.048,   assuming all CYS residues are reduced
Aromaticity:0.086

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.96

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.76, 32.24, 20.00]

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:75.2245
Grand average of hydropathicity (GRAVY):0.08