Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1624
Number of amino acids:45
Molecular Weight:4979.55 Da
Theoretical pI:7.03


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)24.44%
Cysteine CYS (C)817.78%
Glutamic Acid GLU (E)12.22%
Aspartic Acid ASP (D)511.11%
Glycine GLY (G)48.89%
Phynylalanine PHE (F)36.67%
Isoleucine ILE (I)24.44%
Histidine HIS (H)48.89%
Lysine LYS (K)48.89%
Methionine MET (M)00%
Leucine LEU (L)00%
Asparagine ASN (N)24.44%
Glutamine GLN (Q)12.22%
Proline PRO (P)00%
Serine SER (S)36.67%
Arginine ARG (R)24.44%
Threonine THR (T)36.67%
Tryptophan TRP (W)00%
Valine VAL (V)12.22%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC201
HydrogenH310
NitrogenN66
OxygenO67
SulphurS8

FormulaC201H310N66O67S8
Total Number of Atoms:652


Total number of positively charged residues (ARG + LYS):6
Total number of negatively charged residues (ASP + GLU):6
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    500
Absorption 0.1% (=1 g/l)    0.100,   assuming all pairs of CYS residues form cystines

Ext. coefficient    0
Absorption 0.1% (=1 g/l)    0.000,   assuming all CYS residues are reduced
Aromaticity:0.067

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 26.90

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[13.33, 20.00, 6.67]

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:28.2222
Grand average of hydropathicity (GRAVY):-0.66