Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5616
Number of amino acids:260
Molecular Weight:27997.97 Da
Theoretical pI:7.65


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)228.46%
Cysteine CYS (C)103.85%
Glutamic Acid GLU (E)114.23%
Aspartic Acid ASP (D)124.62%
Glycine GLY (G)3714.23%
Phynylalanine PHE (F)145.38%
Isoleucine ILE (I)72.69%
Histidine HIS (H)31.15%
Lysine LYS (K)72.69%
Methionine MET (M)62.31%
Leucine LEU (L)238.85%
Asparagine ASN (N)83.08%
Glutamine GLN (Q)72.69%
Proline PRO (P)93.46%
Serine SER (S)176.54%
Arginine ARG (R)176.54%
Threonine THR (T)124.62%
Tryptophan TRP (W)72.69%
Valine VAL (V)238.85%
Tyrosine TYR (Y)83.08%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1246
HydrogenH1914
NitrogenN346
OxygenO359
SulphurS16

FormulaC1246H1914N346O359S16
Total Number of Atoms:3881


Total number of positively charged residues (ARG + LYS):24
Total number of negatively charged residues (ASP + GLU):23
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    51045
Absorption 0.1% (=1 g/l)    1.823,   assuming all pairs of CYS residues form cystines

Ext. coefficient    50420
Absorption 0.1% (=1 g/l)    1.801,   assuming all CYS residues are reduced
Aromaticity:0.112

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 27.59

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.54, 27.31, 23.85]

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:79.1154
Grand average of hydropathicity (GRAVY):0.06