# ADRA1B

Source: https://onco.cc/targets/adra1b/  
OnCo record `adra1b` (Target). Data CC BY-NC 4.0, attribute "Data from OnCo (onco.cc)"; commercial use needs a licence.

## TL;DR

ADRA1B (Alpha-1B adrenergic receptor) is a receptor that reads hormone signals inside the cell nucleus. The public catalogues list it as a drug target, and an approved or late-stage drug is recorded against it. Tied to Neuroendocrine tumours.

## Summary

Alpha-1 adrenergic receptors are G protein-coupled receptors for catecholamines that signal through the G(q) family of G proteins, including G(q) and G(11). Upon activation, they stimulate the phosphatidylinositol-calcium second messenger pathway, leading to calcium release from intracellular stores and activation of protein kinase C. ADRA1B binds the catecholamine ligands norepinephrine and epinephrine.

Open Targets scores its association with cancer at 0.56 (direct and indirect evidence; datatypes literature 0.74, animal model 0.52, genetic association 0.05, clinical 0.86).

## Fields

- Kind: Target
- Last checked: 2026-09-23
- Also known as: adrenoceptor alpha 1B; Alpha-1B adrenergic receptor
- Tags: cancer-genes-wave
- Symbol: ADRA1B
- Class: nuclear-receptor
- Biology: Alpha-1 adrenergic receptors are G protein-coupled receptors for catecholamines that signal through the G(q) family of G proteins, including G(q) and G(11). Upon activation, they stimulate the phosphatidylinositol-calcium second messenger pathway, leading to calcium release from intracellular stores and activation of protein kinase C. ADRA1B binds the catecholamine ligands norepinephrine and epinephrine. Can also couple to G(14) and G(16) proteins. Nuclear ADRA1B forms heterooligomers with ADRA1A to regulate phenylephrine(PE)-stimulated ERK signalling in cardiac myocytes. At the plasma membrane, ADRA1B interacts with CAVIN4/MURC to regulates ERK activation in cardiomyocytes, contributing to the regulation of cardiac hypertrophy. Location: Nucleus membrane; Cell membrane; Cytoplasm; Membrane, caveola (UniProt). Locus 5q33.3 (HGNC).
- Where found: Neuroendocrine tumours: Open Targets association 0.52 with neuroendocrine neoplasm (MONDO_0019496)

## Notes

- Written by scripts/fetch-cancer-genes.ts from CIViC, Open Targets, IntOGen, HGNC and UniProt; the function text is UniProt's, condensed and in UK spelling. Roles: Open Targets known-drug datatype score 0.86. Evidence tier "approved-drug" is the strongest of those signals.
- Prevalence not recorded: none of the sources gives a positivity rate.

## Sources

- HGNC HGNC:278: https://www.genenames.org/data/gene-symbol-report/#!/hgnc_id/HGNC:278
- UniProt P35368: https://www.uniprot.org/uniprotkb/P35368/entry
- NCBI Gene 147: https://www.ncbi.nlm.nih.gov/gene/147
- Ensembl ENSG00000170214: https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000170214

## Connected records

- collections: [Open Targets Platform](https://onco.cc/collections/open-targets/)
- cancers: [Neuroendocrine tumours](https://onco.cc/cancers/neuroendocrine/)

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JSON: https://onco.cc/api/v1/entities/adra1b.json