Isolate nucleic acid encoding human MGLUR8

Details Isolate nucleic acid encoding human MGLUR8 Isolate nucleic acid encoding human MGLUR8

1997-05-13

2001-04-24

Ulm, John (Department: 1646)

Chemistry: molecular biology and microbiology

Measuring or testing process involving enzymes or...

Involving antigen-antibody binding, specific binding protein...

C435S007200, C435S069100, C435S252300, C435S320100, C536S023500

Reexamination Certificate

active

06221609

ABSTRACT:

BACKGROUND OF THE INVENTION
In the mammalian central nervous system (CNS), the transmission of nerve impulses is controlled by the interaction between a neurotransmitter, that is released by a sending neuron, and a surface receptor on a receiving neuron, which causes excitation of this receiving neuron. L-Glutamate, which is the most abundant neurotransmitter in the CNS, mediates the major excitatory pathway in mammals, and is referred to as an excitatory amino acid (EAA). The receptors that respond to glutamate are called excitatory amino acid receptors (EAA receptors). See Watkins & Evans,
Annual Reviews in Pharmacology and Toxicology,
21:165 (1981); Monaghan, Bridges, and Cotman,
Annual Reviews in Pharmacology and Toxicology,
29:365 (1989); Watkins, Krogsgaard-Larsen, and Honore,
Transactions in Pharmaceutical Science,
11:25 (1990). The excitatory amino acids are of great physiological importance, playing a role in a variety of physiological processes, such as long-term potentiation (learning and memory), the development of synaptic plasticity, motor control, respiration, cardiovascular regulation, and sensory perception.
Excitatory amino acid receptors are classified into two general types. Receptors that are directly coupled to the opening of cation channels in the cell membrane of the neurons are termed “ionotropic.” This type of receptor has been subdivided into at least three subtypes, which are defined by the depolarizing actions of the selective agonists N-methyl-D-aspartate (NMDA), a-amino-3-hydroxy-5-methylisoxazole-4-propionic acid (AMPA), and kainic acid (KA).
The second general type of receptor is the G-protein or second messenger-linked “metabotropic” excitatory amino acid receptor. This second type is coupled to multiple second messenger systems that lead to enhanced phosphoinositide hydrolysis, activation of phospholipase D, increases or decreases in cAMP formation, or changes in ion channel function. Schoepp and Conn,
Trends in Pharmacological Science,
14:13 (1993). Both types of receptors appear not only to mediate normal synaptic transmission along excitatory pathways, but also participate in the modification of synaptic connections during development and throughout life. Schoepp, Bockaert, and Sladeczek,
Trends in Pharmacological Science,
11:508 (1990); McDonald and Johnson,
Brain Research Reviews,
15:41 (1990).
The excessive or inappropriate stimulation of excitatory amino acid receptors leads to neuronal cell damage or loss by way of a mechanism known as excitotoxicity. This process has been suggested to mediate neuronal degeneration in a variety of conditions. The medical consequences of such neuronal degeneration makes the abatement of these degenerative neurological processes an important therapeutic goal.
The metabotropic glutamate receptors are a highly heterogeneous family of glutamate receptors that are linked to multiple second-messenger pathways. These receptors function to modulate the presynaptic release of glutamate, and the postsynaptic sensitivity of the neuronal cell to glutamate excitation. Agonists and antagonists of these receptors may be useful for the treatment of acute and chronic neurodegenerative conditions, and as antipsychotic, anticonvulsant, analgesic, anxiolytic, antidepressant, and anti-emetic agents.
The present invention provides an additional human excitatory amino acid receptor, designated mGluR8, to those previously known. The characterization and treatment of physiological disorders is hereby furthered.
SUMMARY OF THE INVENTION
This invention provides an isolated amino acid compound useful as a human metabotropic glutamate receptor, the compound having the amino acid sequence which is designated as SEQ ID NO:2.
The present invention also provides an isolated nucleic acid compound that comprises a nucleic acid sequence which encodes for the amino acid compounds provided. Particularly this invention provides the isolated nucleic acid compound having the sequence designated as SEQ ID NO:1.
This invention also provides recombinant nucleic acid vectors comprising nucleic acids encoding SEQ ID NO:2. This invention also encompasses recombinant DNA vectors which comprise the isolated DNA sequence which is SEQ ID NO:1.
The present invention also provides assays for determining the efficacy and reaction profile of agents useful in the treatment or prevention of disorders associated with an excess or deficiency in the amount of glutamate present.
DEFINITIONS
The terms and abbreviations used in this document have their normal meanings unless otherwise designated. For example “_C” refers to degrees Celsius; “N” refers to normal or normality; “mM” refers to millimole or millimoles; “g” refers to gram or grams; “ml” means milliliter or milliliters; “M” refers to molar or molarity; “&mgr;g” refers to microgram or micrograms; and “&mgr;l” refers to microliter or microliters.
All nucleic acid sequences, unless otherwise designated, are written in the direction from the 5′ end to the 3′ end, frequently referred to as “5′ to 3′”.
All amino acid or protein sequences, unless otherwise designated, are written commencing with the amino terminus (“N-terminus”) and concluding with the carboxy terminus (“C-terminus”).
“Base pair” or “bp” as used herein refers to DNA or RNA. The abbreviations A,C,G, and T correspond to the 5′-monophosphate forms of the deoxyribonucleosides (deoxy)adenosine, (deoxy)cytidine, (deoxy)guanosine, and (deoxy)thymidine, respectively, when they occur in DNA molecules. The abbreviations U,C,G, and A correspond to the 5′-monophosphate forms of the ribonucleosides urodine, cytidine, guanosine, and adenosine, respectively when they occur in RNA molecules. In double stranded DNA, base pair may refer to a pairing of A with T or C with G. In a DNA/RNA, heteroduplex base pair may refer to a pairing of A with U or C with G. (See the definition of “complementary”, infra.)
The terms “cleavage” or “restriction” of DNA refers to the catalytic cleavage of the DNA with a restriction enzyme that acts only at certain sequences in the DNA (“sequence-specific endonucleases”). The various restriction enzymes used herein are commercially available and their reaction conditions, cofactors, and other requirements were used as would be known to one of ordinary skill in the art. Appropriate buffers and substrate amounts for particular restriction enzymes are specified by the manufacturer or can be readily found in the literature.
“Ligation” refers to the process of forming phosphodiester bonds between two nucleic acid fragments (T. Maniatis, et al., supra., p. 146). Unless otherwise provided, ligation may be accomplished using known buffers and conditions with a DNA ligase, such as T4 DNA ligase.
The term “plasmid” refers to an extrachromosomal (usually) self-replicating genetic element. Plasmids are generally designated by a lower case “p” followed by letters and/or numbers. The starting plasmids herein are either commercially available, publicly available on an unrestricted basis, or can be constructed from available plasmids in accordance with published procedures. In addition, equivalent plasmids to those described are known in the art and will be apparent to the ordinarily skilled artisan.
The term “reading frame” means the nucleotide sequence from which translation occurs “read” in triplets by the translational apparatus of transfer RNA (tRNA) and ribosomes and associated factors, each triplet corresponding to a particular amino acid. A frameshift mutation occurs when a base pair is inserted or deleted from a DNA segment. When this occurs, the result is a different protein from that coded for by the DNA segment prior to the frameshift mutation. To insure against this, the triplet codons corresponding to the desired polypeptide must be aligned in multiples of three from the initiation codon, i.e. the correct “reading frame” being maintained.
“Recombinant DNA cloning vector” as used herein refers to any autonomously replicating agent, including, but not limited to, plasmids and phages, compris

Affiliated with

Also associated with

Rating

Isolate nucleic acid encoding human MGLUR8 does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Isolate nucleic acid encoding human MGLUR8, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Isolate nucleic acid encoding human MGLUR8 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2524327