Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2150
Number of amino acids:47
Molecular Weight:5449.18 Da
Theoretical pI:8.2


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)00%
Cysteine CYS (C)817.02%
Glutamic Acid GLU (E)36.38%
Aspartic Acid ASP (D)48.51%
Glycine GLY (G)36.38%
Phynylalanine PHE (F)24.26%
Isoleucine ILE (I)12.13%
Histidine HIS (H)24.26%
Lysine LYS (K)510.64%
Methionine MET (M)00%
Leucine LEU (L)36.38%
Asparagine ASN (N)48.51%
Glutamine GLN (Q)00%
Proline PRO (P)24.26%
Serine SER (S)36.38%
Arginine ARG (R)48.51%
Threonine THR (T)24.26%
Tryptophan TRP (W)12.13%
Valine VAL (V)00%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC223
HydrogenH353
NitrogenN73
OxygenO71
SulphurS8

FormulaC223H353N73O71S8
Total Number of Atoms:728


Total number of positively charged residues (ARG + LYS):9
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    6000
Absorption 0.1% (=1 g/l)    1.101,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    1.009,   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 : 18.46

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[14.89, 25.53, 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):-1.06