Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1609
Number of amino acids:48
Molecular Weight:5196.05 Da
Theoretical pI:8.52


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)24.17%
Cysteine CYS (C)816.67%
Glutamic Acid GLU (E)24.17%
Aspartic Acid ASP (D)24.17%
Glycine GLY (G)612.5%
Phynylalanine PHE (F)48.33%
Isoleucine ILE (I)24.17%
Histidine HIS (H)00%
Lysine LYS (K)36.25%
Methionine MET (M)00%
Leucine LEU (L)48.33%
Asparagine ASN (N)24.17%
Glutamine GLN (Q)12.08%
Proline PRO (P)12.08%
Serine SER (S)48.33%
Arginine ARG (R)48.33%
Threonine THR (T)24.17%
Tryptophan TRP (W)00%
Valine VAL (V)12.08%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC217
HydrogenH350
NitrogenN66
OxygenO66
SulphurS8

FormulaC217H350N66O66S8
Total Number of Atoms:707


Total number of positively charged residues (ARG + LYS):7
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    500
Absorption 0.1% (=1 g/l)    0.096,   assuming all pairs of CYS residues form cystines

Ext. coefficient    0
Absorption 0.1% (=1 g/l)    0.000,   assuming all CYS residues are reduced
Aromaticity:0.083

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.09

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[22.92, 27.08, 16.67]

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:58.9583
Grand average of hydropathicity (GRAVY):0.01