Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5508
Number of amino acids:56
Molecular Weight:5971.1 Da
Theoretical pI:8.02


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)47.14%
Cysteine CYS (C)23.57%
Glutamic Acid GLU (E)23.57%
Aspartic Acid ASP (D)23.57%
Glycine GLY (G)35.36%
Phynylalanine PHE (F)23.57%
Isoleucine ILE (I)712.5%
Histidine HIS (H)00%
Lysine LYS (K)35.36%
Methionine MET (M)23.57%
Leucine LEU (L)47.14%
Asparagine ASN (N)11.79%
Glutamine GLN (Q)00%
Proline PRO (P)47.14%
Serine SER (S)58.93%
Arginine ARG (R)23.57%
Threonine THR (T)712.5%
Tryptophan TRP (W)00%
Valine VAL (V)58.93%
Tyrosine TYR (Y)11.79%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC267
HydrogenH444
NitrogenN66
OxygenO79
SulphurS4

FormulaC267H444N66O79S4
Total Number of Atoms:860


Total number of positively charged residues (ARG + LYS):5
Total number of negatively charged residues (ASP + GLU):4
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    1615
Absorption 0.1% (=1 g/l)    0.270,   assuming all pairs of CYS residues form cystines

Ext. coefficient    1490
Absorption 0.1% (=1 g/l)    0.250,   assuming all CYS residues are reduced
Aromaticity:0.054

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.17

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.93, 23.21, 21.43]

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:109.643
Grand average of hydropathicity (GRAVY):0.59