Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2275
Number of amino acids:46
Molecular Weight:5296.07 Da
Theoretical pI:5.01


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)510.87%
Cysteine CYS (C)817.39%
Glutamic Acid GLU (E)48.7%
Aspartic Acid ASP (D)12.17%
Glycine GLY (G)24.35%
Phynylalanine PHE (F)36.52%
Isoleucine ILE (I)12.17%
Histidine HIS (H)00%
Lysine LYS (K)48.7%
Methionine MET (M)00%
Leucine LEU (L)12.17%
Asparagine ASN (N)48.7%
Glutamine GLN (Q)24.35%
Proline PRO (P)12.17%
Serine SER (S)00%
Arginine ARG (R)00%
Threonine THR (T)24.35%
Tryptophan TRP (W)24.35%
Valine VAL (V)36.52%
Tyrosine TYR (Y)36.52%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC233
HydrogenH338
NitrogenN58
OxygenO68
SulphurS8

FormulaC233H338N58O68S8
Total Number of Atoms:705


Total number of positively charged residues (ARG + LYS):4
Total number of negatively charged residues (ASP + GLU):5
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    15970
Absorption 0.1% (=1 g/l)    3.015,   assuming all pairs of CYS residues form cystines

Ext. coefficient    15470
Absorption 0.1% (=1 g/l)    2.921,   assuming all CYS residues are reduced
Aromaticity:0.174

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 26.93

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.26, 15.22, 21.74]

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:46.7391
Grand average of hydropathicity (GRAVY):-0.12