Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4491
Number of amino acids:666
Molecular Weight:74057.5 Da
Theoretical pI:6.64


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)436.46%
Cysteine CYS (C)152.25%
Glutamic Acid GLU (E)314.65%
Aspartic Acid ASP (D)355.26%
Glycine GLY (G)426.31%
Phynylalanine PHE (F)395.86%
Isoleucine ILE (I)385.71%
Histidine HIS (H)50.75%
Lysine LYS (K)294.35%
Methionine MET (M)182.7%
Leucine LEU (L)609.01%
Asparagine ASN (N)355.26%
Glutamine GLN (Q)284.2%
Proline PRO (P)294.35%
Serine SER (S)639.46%
Arginine ARG (R)365.41%
Threonine THR (T)446.61%
Tryptophan TRP (W)30.45%
Valine VAL (V)477.06%
Tyrosine TYR (Y)263.9%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3294
HydrogenH5163
NitrogenN879
OxygenO995
SulphurS33

FormulaC3294H5163N879O995S33
Total Number of Atoms:10364


Total number of positively charged residues (ARG + LYS):65
Total number of negatively charged residues (ASP + GLU):66
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    56115
Absorption 0.1% (=1 g/l)    0.758,   assuming all pairs of CYS residues form cystines

Ext. coefficient    55240
Absorption 0.1% (=1 g/l)    0.746,   assuming all CYS residues are reduced
Aromaticity:0.102

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 48.30

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.98, 25.38, 22.82]

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:84.3093
Grand average of hydropathicity (GRAVY):-0.10