Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5875
Number of amino acids:102
Molecular Weight:10975.97 Da
Theoretical pI:8.32


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)98.82%
Cysteine CYS (C)1110.78%
Glutamic Acid GLU (E)21.96%
Aspartic Acid ASP (D)65.88%
Glycine GLY (G)65.88%
Phynylalanine PHE (F)54.9%
Isoleucine ILE (I)32.94%
Histidine HIS (H)21.96%
Lysine LYS (K)109.8%
Methionine MET (M)43.92%
Leucine LEU (L)98.82%
Asparagine ASN (N)65.88%
Glutamine GLN (Q)21.96%
Proline PRO (P)43.92%
Serine SER (S)76.86%
Arginine ARG (R)10.98%
Threonine THR (T)43.92%
Tryptophan TRP (W)00%
Valine VAL (V)98.82%
Tyrosine TYR (Y)21.96%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC475
HydrogenH765
NitrogenN127
OxygenO140
SulphurS15

FormulaC475H765N127O140S15
Total Number of Atoms:1522


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):8
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    3605
Absorption 0.1% (=1 g/l)    0.328,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.272,   assuming all CYS residues are reduced
Aromaticity:0.069

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.24

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.45, 22.55, 23.53]

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:80.2941
Grand average of hydropathicity (GRAVY):0.25