Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2802
Number of amino acids:47
Molecular Weight:5279.97 Da
Theoretical pI:8.99


Amino Acid Composition:


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


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC212
HydrogenH338
NitrogenN76
OxygenO67
SulphurS8

FormulaC212H338N76O67S8
Total Number of Atoms:701


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):4
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)    0.095,   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:0.085

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 71.13

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[12.77, 27.66, 8.51]

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:16.5957
Grand average of hydropathicity (GRAVY):-0.75