Physicochemical Properties of Peptide



PPepDB ID:PPepDB_268
Number of amino acids:46
Molecular Weight:5123.07 Da
Theoretical pI:8.9


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)12.17%
Cysteine CYS (C)817.39%
Glutamic Acid GLU (E)12.17%
Aspartic Acid ASP (D)24.35%
Glycine GLY (G)613.04%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)36.52%
Histidine HIS (H)12.17%
Lysine LYS (K)510.87%
Methionine MET (M)24.35%
Leucine LEU (L)24.35%
Asparagine ASN (N)24.35%
Glutamine GLN (Q)00%
Proline PRO (P)00%
Serine SER (S)12.17%
Arginine ARG (R)36.52%
Threonine THR (T)510.87%
Tryptophan TRP (W)12.17%
Valine VAL (V)12.17%
Tyrosine TYR (Y)24.35%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC211
HydrogenH347
NitrogenN65
OxygenO63
SulphurS10

FormulaC211H347N65O63S10
Total Number of Atoms:696


Total number of positively charged residues (ARG + LYS):8
Total number of negatively charged residues (ASP + GLU):3
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)    1.753,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8480
Absorption 0.1% (=1 g/l)    1.655,   assuming all CYS residues are reduced
Aromaticity:0.065

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 19.85

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[19.57, 19.57, 13.04]

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:50.8696
Grand average of hydropathicity (GRAVY):-0.28