Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3033
Number of amino acids:47
Molecular Weight:5413.06 Da
Theoretical pI:7.72


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)12.13%
Cysteine CYS (C)817.02%
Glutamic Acid GLU (E)24.26%
Aspartic Acid ASP (D)510.64%
Glycine GLY (G)36.38%
Phynylalanine PHE (F)12.13%
Isoleucine ILE (I)00%
Histidine HIS (H)24.26%
Lysine LYS (K)36.38%
Methionine MET (M)00%
Leucine LEU (L)36.38%
Asparagine ASN (N)36.38%
Glutamine GLN (Q)00%
Proline PRO (P)12.13%
Serine SER (S)24.26%
Arginine ARG (R)510.64%
Threonine THR (T)510.64%
Tryptophan TRP (W)12.13%
Valine VAL (V)12.13%
Tyrosine TYR (Y)12.13%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC218
HydrogenH345
NitrogenN73
OxygenO73
SulphurS8

FormulaC218H345N73O73S8
Total Number of Atoms:717


Total number of positively charged residues (ARG + LYS):8
Total number of negatively charged residues (ASP + GLU):7
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    7490
Absorption 0.1% (=1 g/l)    1.384,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    1.291,   assuming all CYS residues are reduced
Aromaticity:0.064

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 24.42

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[14.89, 19.15, 12.77]

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:33.1915
Grand average of hydropathicity (GRAVY):-0.97