Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1639
Number of amino acids:48
Molecular Weight:5400.09 Da
Theoretical pI:8.57


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)24.17%
Cysteine CYS (C)714.58%
Glutamic Acid GLU (E)24.17%
Aspartic Acid ASP (D)00%
Glycine GLY (G)510.42%
Phynylalanine PHE (F)12.08%
Isoleucine ILE (I)36.25%
Histidine HIS (H)24.17%
Lysine LYS (K)24.17%
Methionine MET (M)00%
Leucine LEU (L)24.17%
Asparagine ASN (N)612.5%
Glutamine GLN (Q)24.17%
Proline PRO (P)12.08%
Serine SER (S)48.33%
Arginine ARG (R)36.25%
Threonine THR (T)12.08%
Tryptophan TRP (W)12.08%
Valine VAL (V)12.08%
Tyrosine TYR (Y)36.25%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC226
HydrogenH346
NitrogenN72
OxygenO69
SulphurS7

FormulaC226H346N72O69S7
Total Number of Atoms:720


Total number of positively charged residues (ARG + LYS):5
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    10345
Absorption 0.1% (=1 g/l)    1.916,   assuming all pairs of CYS residues form cystines

Ext. coefficient    9970
Absorption 0.1% (=1 g/l)    1.846,   assuming all CYS residues are reduced
Aromaticity:0.104

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.99

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[22.92, 33.33, 12.50]

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:50.8333
Grand average of hydropathicity (GRAVY):-0.54