Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4169
Number of amino acids:708
Molecular Weight:77872.64 Da
Theoretical pI:6.85


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)425.93%
Cysteine CYS (C)253.53%
Glutamic Acid GLU (E)344.8%
Aspartic Acid ASP (D)395.51%
Glycine GLY (G)527.34%
Phynylalanine PHE (F)365.08%
Isoleucine ILE (I)436.07%
Histidine HIS (H)182.54%
Lysine LYS (K)304.24%
Methionine MET (M)141.98%
Leucine LEU (L)709.89%
Asparagine ASN (N)324.52%
Glutamine GLN (Q)192.68%
Proline PRO (P)314.38%
Serine SER (S)8311.72%
Arginine ARG (R)415.79%
Threonine THR (T)385.37%
Tryptophan TRP (W)81.13%
Valine VAL (V)395.51%
Tyrosine TYR (Y)141.98%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3425
HydrogenH5396
NitrogenN956
OxygenO1041
SulphurS39

FormulaC3425H5396N956O1041S39
Total Number of Atoms:10857


Total number of positively charged residues (ARG + LYS):71
Total number of negatively charged residues (ASP + GLU):73
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    66360
Absorption 0.1% (=1 g/l)    0.852,   assuming all pairs of CYS residues form cystines

Ext. coefficient    64860
Absorption 0.1% (=1 g/l)    0.833,   assuming all CYS residues are reduced
Aromaticity:0.082

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 46.40

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.66, 27.97, 22.60]

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:84.1526
Grand average of hydropathicity (GRAVY):-0.13