Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3972
Number of amino acids:51
Molecular Weight:5694.55 Da
Theoretical pI:8.72


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)47.84%
Phynylalanine PHE (F)23.92%
Isoleucine ILE (I)23.92%
Histidine HIS (H)23.92%
Lysine LYS (K)47.84%
Methionine MET (M)00%
Leucine LEU (L)23.92%
Asparagine ASN (N)611.76%
Glutamine GLN (Q)23.92%
Proline PRO (P)35.88%
Serine SER (S)35.88%
Arginine ARG (R)23.92%
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
HydrogenH372
NitrogenN74
OxygenO70
SulphurS8

FormulaC242H372N74O70S8
Total Number of Atoms:766


Total number of positively charged residues (ARG + LYS):6
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)    1.577,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8480
Absorption 0.1% (=1 g/l)    1.489,   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 : 36.04

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[21.57, 31.37, 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):-0.45