Physicochemical Properties of Peptide



PPepDB ID:PPepDB_911
Number of amino acids:248
Molecular Weight:26512.8 Da
Theoretical pI:5.83


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)166.45%
Cysteine CYS (C)166.45%
Glutamic Acid GLU (E)72.82%
Aspartic Acid ASP (D)135.24%
Glycine GLY (G)3112.5%
Phynylalanine PHE (F)124.84%
Isoleucine ILE (I)83.23%
Histidine HIS (H)10.4%
Lysine LYS (K)72.82%
Methionine MET (M)31.21%
Leucine LEU (L)208.06%
Asparagine ASN (N)176.85%
Glutamine GLN (Q)72.82%
Proline PRO (P)114.44%
Serine SER (S)228.87%
Arginine ARG (R)124.84%
Threonine THR (T)166.45%
Tryptophan TRP (W)41.61%
Valine VAL (V)156.05%
Tyrosine TYR (Y)104.03%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1153
HydrogenH1769
NitrogenN321
OxygenO361
SulphurS19

FormulaC1153H1769N321O361S19
Total Number of Atoms:3623


Total number of positively charged residues (ARG + LYS):19
Total number of negatively charged residues (ASP + GLU):20
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    37900
Absorption 0.1% (=1 g/l)    1.429,   assuming all pairs of CYS residues form cystines

Ext. coefficient    36900
Absorption 0.1% (=1 g/l)    1.392,   assuming all CYS residues are reduced
Aromaticity:0.105

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 38.46

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.82, 32.66, 18.55]

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:68.0242
Grand average of hydropathicity (GRAVY):-0.12