Physicochemical Properties of Peptide



PPepDB ID:PPepDB_892
Number of amino acids:255
Molecular Weight:27093.38 Da
Theoretical pI:5.13


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)207.84%
Cysteine CYS (C)187.06%
Glutamic Acid GLU (E)41.57%
Aspartic Acid ASP (D)207.84%
Glycine GLY (G)249.41%
Phynylalanine PHE (F)135.1%
Isoleucine ILE (I)145.49%
Histidine HIS (H)20.78%
Lysine LYS (K)135.1%
Methionine MET (M)10.39%
Leucine LEU (L)145.49%
Asparagine ASN (N)176.67%
Glutamine GLN (Q)62.35%
Proline PRO (P)135.1%
Serine SER (S)228.63%
Arginine ARG (R)72.75%
Threonine THR (T)228.63%
Tryptophan TRP (W)31.18%
Valine VAL (V)145.49%
Tyrosine TYR (Y)83.14%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1176
HydrogenH1813
NitrogenN319
OxygenO379
SulphurS19

FormulaC1176H1813N319O379S19
Total Number of Atoms:3706


Total number of positively charged residues (ARG + LYS):20
Total number of negatively charged residues (ASP + GLU):24
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    29545
Absorption 0.1% (=1 g/l)    1.090,   assuming all pairs of CYS residues form cystines

Ext. coefficient    28420
Absorption 0.1% (=1 g/l)    1.049,   assuming all CYS residues are reduced
Aromaticity:0.094

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.19

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.88, 29.80, 15.29]

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:66.5883
Grand average of hydropathicity (GRAVY):-0.14