Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4110
Number of amino acids:686
Molecular Weight:76354.32 Da
Theoretical pI:8.08


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)304.37%
Cysteine CYS (C)152.19%
Glutamic Acid GLU (E)355.1%
Aspartic Acid ASP (D)324.66%
Glycine GLY (G)497.14%
Phynylalanine PHE (F)415.98%
Isoleucine ILE (I)456.56%
Histidine HIS (H)91.31%
Lysine LYS (K)395.69%
Methionine MET (M)142.04%
Leucine LEU (L)598.6%
Asparagine ASN (N)456.56%
Glutamine GLN (Q)263.79%
Proline PRO (P)344.96%
Serine SER (S)629.04%
Arginine ARG (R)314.52%
Threonine THR (T)405.83%
Tryptophan TRP (W)60.87%
Valine VAL (V)547.87%
Tyrosine TYR (Y)202.92%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3415
HydrogenH5353
NitrogenN913
OxygenO1014
SulphurS29

FormulaC3415H5353N913O1014S29
Total Number of Atoms:10724


Total number of positively charged residues (ARG + LYS):70
Total number of negatively charged residues (ASP + GLU):67
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    63675
Absorption 0.1% (=1 g/l)    0.834,   assuming all pairs of CYS residues form cystines

Ext. coefficient    62800
Absorption 0.1% (=1 g/l)    0.822,   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 : 46.48

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.80, 27.70, 20.12]

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:86.3265
Grand average of hydropathicity (GRAVY):-0.15