The alpha-1B adrenergic receptor (α
1B-adrenoreceptor), also known as ADRA1B, is an
alpha-1 adrenergic receptor
alpha-1 (α1) adrenergic are G protein-coupled receptors (GPCRs) associated with the Gq alpha subunit, Gq heterotrimeric G protein. α1-adrenergic receptors are subdivided into three highly homologous subtypes, i.e., α1A-adrenergic, α1A-, α1B ...
, and also denotes the human
gene
In biology, the word gene has two meanings. The Mendelian gene is a basic unit of heredity. The molecular gene is a sequence of nucleotides in DNA that is transcribed to produce a functional RNA. There are two types of molecular genes: protei ...
encoding it.
The crystal structure of the α
1B-adrenergic receptor has been determined in complex with the inverse agonist (+)-cyclazosin.
Receptor
There are 3 alpha-1 adrenergic receptor subtypes: alpha-1A, -1B and -1D, all of which signal through the Gq/11 family of G-proteins and different subtypes show different patterns of activation. They activate mitogenic responses and regulate growth and proliferation of many cells.
Gene
This gene encodes alpha-1B-adrenergic receptor, which induces neoplastic transformation when transfected into NIH 3T3 fibroblasts and other cell lines. Thus, this normal cellular gene is identified as a
protooncogene. This gene comprises 2
exons
An exon is any part of a gene that will form a part of the final mature RNA produced by that gene after introns have been removed by RNA splicing. The term ''exon'' refers to both the DNA sequence within a gene and to the corresponding sequence i ...
and a single large intron of at least 20 kb that interrupts the coding region.
Ligands
; Antagonists
*
L-765,314
*
Risperidone
Risperidone, sold under the brand name Risperdal among others, is an atypical antipsychotic used to treat schizophrenia and bipolar disorder, as well as aggressive and self-injurious behaviors associated with autism spectrum disorder. It is t ...
*
Brexpiprazole
Brexpiprazole, sold under the brand name Rexulti among others, is an atypical antipsychotic medication used for the treatment of major depressive disorder, schizophrenia, and Agitation (dementia), agitation associated with dementia due to Alzhe ...
Interactions
Alpha-1B adrenergic receptor has been shown to
interact with
AP2M1.
A role in regulation of dopaminergic neurotransmission has also been suggested.
See also
*
Adrenergic receptor
The adrenergic receptors or adrenoceptors are a class of G protein-coupled receptors that are targets of many catecholamines like norepinephrine (noradrenaline) and epinephrine (adrenaline) produced by the body, but also many medications like b ...
References
External links
*
Further reading
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
Adrenergic receptors
{{transmembranereceptor-stub