Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1046
Number of amino acids:115
Molecular Weight:12496.87 Da
Theoretical pI:5.76


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1210.43%
Cysteine CYS (C)65.22%
Glutamic Acid GLU (E)76.09%
Aspartic Acid ASP (D)54.35%
Glycine GLY (G)21.74%
Phynylalanine PHE (F)54.35%
Isoleucine ILE (I)1210.43%
Histidine HIS (H)10.87%
Lysine LYS (K)108.7%
Methionine MET (M)43.48%
Leucine LEU (L)1210.43%
Asparagine ASN (N)54.35%
Glutamine GLN (Q)10.87%
Proline PRO (P)65.22%
Serine SER (S)119.57%
Arginine ARG (R)10.87%
Threonine THR (T)43.48%
Tryptophan TRP (W)00%
Valine VAL (V)97.83%
Tyrosine TYR (Y)21.74%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC561
HydrogenH918
NitrogenN136
OxygenO163
SulphurS10

FormulaC561H918N136O163S10
Total Number of Atoms:1788


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):12
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    3355
Absorption 0.1% (=1 g/l)    0.268,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.238,   assuming all CYS residues are reduced
Aromaticity:0.061

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 46.09

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.78, 20.87, 30.43]

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:114.522
Grand average of hydropathicity (GRAVY):0.53