Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1347
Number of amino acids:244
Molecular Weight:26208.27 Da
Theoretical pI:8.56


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)145.74%
Cysteine CYS (C)208.2%
Glutamic Acid GLU (E)72.87%
Aspartic Acid ASP (D)62.46%
Glycine GLY (G)2610.66%
Phynylalanine PHE (F)104.1%
Isoleucine ILE (I)166.56%
Histidine HIS (H)41.64%
Lysine LYS (K)135.33%
Methionine MET (M)31.23%
Leucine LEU (L)239.43%
Asparagine ASN (N)166.56%
Glutamine GLN (Q)93.69%
Proline PRO (P)145.74%
Serine SER (S)197.79%
Arginine ARG (R)72.87%
Threonine THR (T)176.97%
Tryptophan TRP (W)31.23%
Valine VAL (V)93.69%
Tyrosine TYR (Y)83.28%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1150
HydrogenH1806
NitrogenN314
OxygenO340
SulphurS23

FormulaC1150H1806N314O340S23
Total Number of Atoms:3633


Total number of positively charged residues (ARG + LYS):20
Total number of negatively charged residues (ASP + GLU):13
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    29670
Absorption 0.1% (=1 g/l)    1.132,   assuming all pairs of CYS residues form cystines

Ext. coefficient    28420
Absorption 0.1% (=1 g/l)    1.084,   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 : 31.49

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.28, 30.74, 19.26]

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:78.7705
Grand average of hydropathicity (GRAVY):0.02