Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5448
Number of amino acids:254
Molecular Weight:27664.93 Da
Theoretical pI:5.71


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)239.06%
Cysteine CYS (C)51.97%
Glutamic Acid GLU (E)72.76%
Aspartic Acid ASP (D)166.3%
Glycine GLY (G)2911.42%
Phynylalanine PHE (F)166.3%
Isoleucine ILE (I)135.12%
Histidine HIS (H)20.79%
Lysine LYS (K)83.15%
Methionine MET (M)51.97%
Leucine LEU (L)145.51%
Asparagine ASN (N)197.48%
Glutamine GLN (Q)103.94%
Proline PRO (P)103.94%
Serine SER (S)135.12%
Arginine ARG (R)135.12%
Threonine THR (T)207.87%
Tryptophan TRP (W)41.57%
Valine VAL (V)166.3%
Tyrosine TYR (Y)114.33%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1228
HydrogenH1862
NitrogenN338
OxygenO374
SulphurS10

FormulaC1228H1862N338O374S10
Total Number of Atoms:3812


Total number of positively charged residues (ARG + LYS):21
Total number of negatively charged residues (ASP + GLU):23
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    38640
Absorption 0.1% (=1 g/l)    1.397,   assuming all pairs of CYS residues form cystines

Ext. coefficient    38390
Absorption 0.1% (=1 g/l)    1.388,   assuming all CYS residues are reduced
Aromaticity:0.122

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 31.22

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.13, 27.95, 19.29]

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:68.7795
Grand average of hydropathicity (GRAVY):-0.24