Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1567
Number of amino acids:49
Molecular Weight:5614.25 Da
Theoretical pI:8.21


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)36.12%
Cysteine CYS (C)816.33%
Glutamic Acid GLU (E)24.08%
Aspartic Acid ASP (D)24.08%
Glycine GLY (G)510.2%
Phynylalanine PHE (F)24.08%
Isoleucine ILE (I)00%
Histidine HIS (H)36.12%
Lysine LYS (K)36.12%
Methionine MET (M)00%
Leucine LEU (L)24.08%
Asparagine ASN (N)510.2%
Glutamine GLN (Q)12.04%
Proline PRO (P)00%
Serine SER (S)24.08%
Arginine ARG (R)36.12%
Threonine THR (T)48.16%
Tryptophan TRP (W)36.12%
Valine VAL (V)00%
Tyrosine TYR (Y)12.04%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC234
HydrogenH344
NitrogenN76
OxygenO71
SulphurS8

FormulaC234H344N76O71S8
Total Number of Atoms:733


Total number of positively charged residues (ARG + LYS):6
Total number of negatively charged residues (ASP + GLU):4
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    18490
Absorption 0.1% (=1 g/l)    3.293,   assuming all pairs of CYS residues form cystines

Ext. coefficient    17990
Absorption 0.1% (=1 g/l)    3.204,   assuming all CYS residues are reduced
Aromaticity:0.122

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 16.72

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[16.33, 24.49, 14.29]

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:22.0408
Grand average of hydropathicity (GRAVY):-0.85