Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1289
Number of amino acids:246
Molecular Weight:25781.05 Da
Theoretical pI:4.83


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2610.57%
Cysteine CYS (C)166.5%
Glutamic Acid GLU (E)72.85%
Aspartic Acid ASP (D)145.69%
Glycine GLY (G)218.54%
Phynylalanine PHE (F)124.88%
Isoleucine ILE (I)83.25%
Histidine HIS (H)10.41%
Lysine LYS (K)124.88%
Methionine MET (M)31.22%
Leucine LEU (L)166.5%
Asparagine ASN (N)93.66%
Glutamine GLN (Q)114.47%
Proline PRO (P)197.72%
Serine SER (S)239.35%
Arginine ARG (R)41.63%
Threonine THR (T)228.94%
Tryptophan TRP (W)20.81%
Valine VAL (V)124.88%
Tyrosine TYR (Y)83.25%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1125
HydrogenH1736
NitrogenN294
OxygenO362
SulphurS19

FormulaC1125H1736N294O362S19
Total Number of Atoms:3536


Total number of positively charged residues (ARG + LYS):16
Total number of negatively charged residues (ASP + GLU):21
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    23920
Absorption 0.1% (=1 g/l)    0.928,   assuming all pairs of CYS residues form cystines

Ext. coefficient    22920
Absorption 0.1% (=1 g/l)    0.889,   assuming all CYS residues are reduced
Aromaticity:0.089

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.10

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.58, 29.27, 21.14]

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:62.7642
Grand average of hydropathicity (GRAVY):-0.09