Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4151
Number of amino acids:246
Molecular Weight:27529.39 Da
Theoretical pI:4.57


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)114.47%
Cysteine CYS (C)20.81%
Glutamic Acid GLU (E)208.13%
Aspartic Acid ASP (D)249.76%
Glycine GLY (G)114.47%
Phynylalanine PHE (F)72.85%
Isoleucine ILE (I)176.91%
Histidine HIS (H)62.44%
Lysine LYS (K)176.91%
Methionine MET (M)41.63%
Leucine LEU (L)176.91%
Asparagine ASN (N)145.69%
Glutamine GLN (Q)62.44%
Proline PRO (P)176.91%
Serine SER (S)2610.57%
Arginine ARG (R)72.85%
Threonine THR (T)176.91%
Tryptophan TRP (W)31.22%
Valine VAL (V)124.88%
Tyrosine TYR (Y)83.25%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1206
HydrogenH1873
NitrogenN319
OxygenO406
SulphurS6

FormulaC1206H1873N319O406S6
Total Number of Atoms:3810


Total number of positively charged residues (ARG + LYS):24
Total number of negatively charged residues (ASP + GLU):44
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    28545
Absorption 0.1% (=1 g/l)    1.037,   assuming all pairs of CYS residues form cystines

Ext. coefficient    28420
Absorption 0.1% (=1 g/l)    1.032,   assuming all CYS residues are reduced
Aromaticity:0.073

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.25

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.02, 27.64, 21.14]

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:72.5203
Grand average of hydropathicity (GRAVY):-0.71