Physicochemical Properties of Peptide



PPepDB ID:PPepDB_893
Number of amino acids:78
Molecular Weight:8637.09 Da
Theoretical pI:8.77


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)67.69%
Cysteine CYS (C)810.26%
Glutamic Acid GLU (E)45.13%
Aspartic Acid ASP (D)22.56%
Glycine GLY (G)67.69%
Phynylalanine PHE (F)67.69%
Isoleucine ILE (I)11.28%
Histidine HIS (H)11.28%
Lysine LYS (K)11.28%
Methionine MET (M)56.41%
Leucine LEU (L)67.69%
Asparagine ASN (N)22.56%
Glutamine GLN (Q)11.28%
Proline PRO (P)33.85%
Serine SER (S)67.69%
Arginine ARG (R)911.54%
Threonine THR (T)810.26%
Tryptophan TRP (W)00%
Valine VAL (V)33.85%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC362
HydrogenH585
NitrogenN111
OxygenO108
SulphurS13

FormulaC362H585N111O108S13
Total Number of Atoms:1179


Total number of positively charged residues (ARG + LYS):10
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)    0.058,   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:0.077

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 50.16

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[20.51, 21.79, 26.92]

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:53.8461
Grand average of hydropathicity (GRAVY):0.00