Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6110
Number of amino acids:85
Molecular Weight:9596.38 Da
Theoretical pI:8.42


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)67.06%
Cysteine CYS (C)89.41%
Glutamic Acid GLU (E)44.71%
Aspartic Acid ASP (D)55.88%
Glycine GLY (G)67.06%
Phynylalanine PHE (F)78.24%
Isoleucine ILE (I)67.06%
Histidine HIS (H)00%
Lysine LYS (K)910.59%
Methionine MET (M)44.71%
Leucine LEU (L)78.24%
Asparagine ASN (N)22.35%
Glutamine GLN (Q)00%
Proline PRO (P)33.53%
Serine SER (S)78.24%
Arginine ARG (R)33.53%
Threonine THR (T)11.18%
Tryptophan TRP (W)00%
Valine VAL (V)22.35%
Tyrosine TYR (Y)55.88%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC430
HydrogenH667
NitrogenN105
OxygenO119
SulphurS12

FormulaC430H667N105O119S12
Total Number of Atoms:1333


Total number of positively charged residues (ARG + LYS):12
Total number of negatively charged residues (ASP + GLU):9
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    7950
Absorption 0.1% (=1 g/l)    0.828,   assuming all pairs of CYS residues form cystines

Ext. coefficient    7450
Absorption 0.1% (=1 g/l)    0.776,   assuming all CYS residues are reduced
Aromaticity:0.141

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 43.22

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.76, 21.18, 24.71]

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:73.5294
Grand average of hydropathicity (GRAVY):0.15