Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2088
Number of amino acids:51
Molecular Weight:5735.61 Da
Theoretical pI:8.94


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)35.88%
Cysteine CYS (C)815.69%
Glutamic Acid GLU (E)23.92%
Aspartic Acid ASP (D)00%
Glycine GLY (G)59.8%
Phynylalanine PHE (F)23.92%
Isoleucine ILE (I)23.92%
Histidine HIS (H)23.92%
Lysine LYS (K)23.92%
Methionine MET (M)00%
Leucine LEU (L)23.92%
Asparagine ASN (N)47.84%
Glutamine GLN (Q)23.92%
Proline PRO (P)35.88%
Serine SER (S)35.88%
Arginine ARG (R)59.8%
Threonine THR (T)11.96%
Tryptophan TRP (W)11.96%
Valine VAL (V)23.92%
Tyrosine TYR (Y)23.92%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC242
HydrogenH375
NitrogenN79
OxygenO68
SulphurS8

FormulaC242H375N79O68S8
Total Number of Atoms:772


Total number of positively charged residues (ARG + LYS):7
Total number of negatively charged residues (ASP + GLU):2
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    8980
Absorption 0.1% (=1 g/l)    1.566,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8480
Absorption 0.1% (=1 g/l)    1.478,   assuming all CYS residues are reduced
Aromaticity:0.098

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.85

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[21.57, 29.41, 13.73]

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:47.8431
Grand average of hydropathicity (GRAVY):-0.43