Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1230
Number of amino acids:246
Molecular Weight:26358.62 Da
Theoretical pI:7.84


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)166.5%
Cysteine CYS (C)166.5%
Glutamic Acid GLU (E)52.03%
Aspartic Acid ASP (D)104.07%
Glycine GLY (G)3112.6%
Phynylalanine PHE (F)156.1%
Isoleucine ILE (I)62.44%
Histidine HIS (H)10.41%
Lysine LYS (K)62.44%
Methionine MET (M)41.63%
Leucine LEU (L)135.28%
Asparagine ASN (N)187.32%
Glutamine GLN (Q)93.66%
Proline PRO (P)218.54%
Serine SER (S)145.69%
Arginine ARG (R)114.47%
Threonine THR (T)249.76%
Tryptophan TRP (W)52.03%
Valine VAL (V)124.88%
Tyrosine TYR (Y)93.66%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1156
HydrogenH1735
NitrogenN319
OxygenO351
SulphurS20

FormulaC1156H1735N319O351S20
Total Number of Atoms:3581


Total number of positively charged residues (ARG + LYS):17
Total number of negatively charged residues (ASP + GLU):15
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    41910
Absorption 0.1% (=1 g/l)    1.590,   assuming all pairs of CYS residues form cystines

Ext. coefficient    40910
Absorption 0.1% (=1 g/l)    1.552,   assuming all CYS residues are reduced
Aromaticity:0.118

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 38.37

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.39, 34.15, 15.45]

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:50.7723
Grand average of hydropathicity (GRAVY):-0.28