Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2847
Number of amino acids:49
Molecular Weight:5596.2 Da
Theoretical pI:6.73


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)36.12%
Cysteine CYS (C)48.16%
Glutamic Acid GLU (E)48.16%
Aspartic Acid ASP (D)36.12%
Glycine GLY (G)36.12%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)48.16%
Histidine HIS (H)36.12%
Lysine LYS (K)36.12%
Methionine MET (M)00%
Leucine LEU (L)24.08%
Asparagine ASN (N)36.12%
Glutamine GLN (Q)12.04%
Proline PRO (P)24.08%
Serine SER (S)36.12%
Arginine ARG (R)48.16%
Threonine THR (T)48.16%
Tryptophan TRP (W)00%
Valine VAL (V)00%
Tyrosine TYR (Y)36.12%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC234
HydrogenH370
NitrogenN74
OxygenO78
SulphurS4

FormulaC234H370N74O78S4
Total Number of Atoms:760


Total number of positively charged residues (ARG + LYS):7
Total number of negatively charged residues (ASP + GLU):7
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    4720
Absorption 0.1% (=1 g/l)    0.843,   assuming all pairs of CYS residues form cystines

Ext. coefficient    4470
Absorption 0.1% (=1 g/l)    0.799,   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 : 27.71

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[18.37, 22.45, 18.37]

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:53.8776
Grand average of hydropathicity (GRAVY):-1.03