Physicochemical Properties of Peptide



PPepDB ID:PPepDB_819
Number of amino acids:246
Molecular Weight:25994.47 Da
Theoretical pI:8.1


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2911.79%
Cysteine CYS (C)176.91%
Glutamic Acid GLU (E)62.44%
Aspartic Acid ASP (D)135.28%
Glycine GLY (G)2710.98%
Phynylalanine PHE (F)135.28%
Isoleucine ILE (I)83.25%
Histidine HIS (H)10.41%
Lysine LYS (K)72.85%
Methionine MET (M)20.81%
Leucine LEU (L)124.88%
Asparagine ASN (N)124.88%
Glutamine GLN (Q)83.25%
Proline PRO (P)156.1%
Serine SER (S)145.69%
Arginine ARG (R)156.1%
Threonine THR (T)166.5%
Tryptophan TRP (W)31.22%
Valine VAL (V)208.13%
Tyrosine TYR (Y)83.25%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1133
HydrogenH1751
NitrogenN323
OxygenO343
SulphurS19

FormulaC1133H1751N323O343S19
Total Number of Atoms:3569


Total number of positively charged residues (ARG + LYS):22
Total number of negatively charged residues (ASP + GLU):19
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    29420
Absorption 0.1% (=1 g/l)    1.132,   assuming all pairs of CYS residues form cystines

Ext. coefficient    28420
Absorption 0.1% (=1 g/l)    1.093,   assuming all CYS residues are reduced
Aromaticity:0.098

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 31.40

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.02, 27.64, 19.92]

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:67.0731
Grand average of hydropathicity (GRAVY):-0.02