Biomaterial Database

New substrates for enkephalinase (neutral endopeptidase) based on fluorescence energy transfer. 1987

B Malfroy, and J Burnier

Novel fluorescent substrates for enkephalinase (neutral endopeptidase; EC 3.4.24.11) have been developed. These new assays are based on the disappearance of energy transfer between a tryptophan or a tyrosine residue and the 5-dimethylaminonaphthalene-1-sulfonyl group (dansyl) in the substrates dansyl-Gly-Trp-Gly or dansyl-Gly-Tyr-Gly upon hydrolysis of their Gly-Trp or Gly-Tyr amide bond by enkephalinase. No significant difference in Km or kcat values were found for dansyl-Gly-Trp-Gly and dansyl-Gly-Tyr-Gly, indicating that, in contrast to thermolysin, the active site of enkephalinase easily accommodates tryptophan residues. Both tryptophan and tyrosine-containing substrates can be used for continuous recording of enkephalinase activity and should prove useful for detailed study of the substrate specificity of this enzyme.

UI	MeSH Term	Description	Entries
D007668	Kidney	Body organ that filters blood for the secretion of URINE and that regulates ion concentrations.	Kidneys
D007700	Kinetics	The rate dynamics in chemical or physical systems.
D009842	Oligopeptides	Peptides composed of between two and twelve amino acids.	Oligopeptide
D010450	Endopeptidases	A subclass of PEPTIDE HYDROLASES that catalyze the internal cleavage of PEPTIDES or PROTEINS.	Endopeptidase,Peptide Peptidohydrolases
D003619	Dansyl Compounds	Compounds that contain a 1-dimethylaminonaphthalene-5-sulfonyl group.	Dimethylaminonaphthalenesulfonyl Compounds,Compounds, Dansyl,Compounds, Dimethylaminonaphthalenesulfonyl
D004735	Energy Transfer	The transfer of energy of a given form among different scales of motion. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed). It includes the transfer of kinetic energy and the transfer of chemical energy. The transfer of chemical energy from one molecule to another depends on proximity of molecules so it is often used as in techniques to measure distance such as the use of FORSTER RESONANCE ENERGY TRANSFER.	Transfer, Energy
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D013050	Spectrometry, Fluorescence	Measurement of the intensity and quality of fluorescence.	Fluorescence Spectrophotometry,Fluorescence Spectroscopy,Spectrofluorometry,Fluorescence Spectrometry,Spectrophotometry, Fluorescence,Spectroscopy, Fluorescence
D013379	Substrate Specificity	A characteristic feature of enzyme activity in relation to the kind of substrate on which the enzyme or catalytic molecule reacts.	Specificities, Substrate,Specificity, Substrate,Substrate Specificities
D015260	Neprilysin	Enzyme that is a major constituent of kidney brush-border membranes and is also present to a lesser degree in the brain and other tissues. It preferentially catalyzes cleavage at the amino group of hydrophobic residues of the B-chain of insulin as well as opioid peptides and other biologically active peptides. The enzyme is inhibited primarily by EDTA, phosphoramidon, and thiorphan and is reactivated by zinc. Neprilysin is identical to common acute lymphoblastic leukemia antigen (CALLA Antigen), an important marker in the diagnosis of human acute lymphocytic leukemia. There is no relationship with CALLA PLANT.	Antigens, CD10,Antigens, Leukemia, Common Acute Lymphoblastic,CALLA Antigen,CD10 Antigens,Common Acute Lymphoblastic Leukemia Antigens,Endopeptidase-24.11,Enkephalin Dipeptidyl Carboxypeptidase,Enkephalinase,Kidney-Brush-Border Neutral Proteinase,Membrane Metallo-Endopeptidase,Atriopeptidase,CD10 Antigen,Enkephalinase-24.11,Neutral Endopeptidase,Neutral Endopeptidase 24.11,Thermolysin-Like Metalloendopeptidase,YGG-Forming Enzyme,Antigen, CD10,Carboxypeptidase, Enkephalin Dipeptidyl,Dipeptidyl Carboxypeptidase, Enkephalin,Endopeptidase 24.11,Endopeptidase 24.11, Neutral,Endopeptidase, Neutral,Enkephalinase 24.11,Enzyme, YGG-Forming,Kidney Brush Border Neutral Proteinase,Membrane Metallo Endopeptidase,Metallo-Endopeptidase, Membrane,Metalloendopeptidase, Thermolysin-Like,Neutral Proteinase, Kidney-Brush-Border,Thermolysin Like Metalloendopeptidase,YGG Forming Enzyme