Biological Information

Background Information:

Adrenoreceptors belong to the superfamily of G protein-coupled seven transmembrane proteins. G-protein-coupled receptors constitute one of the major signal transduction systems in eukaryotic cells. Coding sequences for these receptors, in those regions believed to contribute to the agonist-antagonist binding site, are strongly conserved across mammalian species. Adrenoreceptors are found in most peripheral tissue and within the central nervous system.

Family:

GPCR

Sub Family:

Adrenoceptor

Class:

Class A

Protein Name:

alpha1B

Uniprot Number:

P35368

Protein Aliases:

Alpha-1B adrenoceptor

Gene Name:

ADRA1B

Gene ID:

147

Organism:

Human

Assay Information

Assay Type:

Biochemical

Assay Sub Type:

Binding

Detection Method:

Radiometry

Measured Response:

Scintillation

Testing Information

Procedure Summary:

Human recombinant adrenergic α1B receptors expressed in human Chem-1 cells are used in modified HEPES buffer pH 7.4. A 1.2 μgǂ aliquot is incubated with 0.2 nM [³H]Prazosin for 60 minutes at 25°C. Non-specific binding is estimated in the presence of 10 μM phentolamine. Receptors are filtered and washed, the filters are then counted to determine [³H]Prazosin specifically bound. Compounds are screened at 10 μM.

Ligand:

[³H] Prazosin

Ligand Kd (nM):

0.13

Ligand Concentration:

0.2 nM

Non Specific:

10 µM Phentolamine

Incubation:

60 min at 25°C

Control Inhibitor:

Prazosin hydrochloride

Criteria For Significance:

≥ 50% of max stimulation or inhibition

Test Concentration / Dose:

Suggested concentration for initial testing is 10 uM

Minimum Order Quantity:

2

Turnaround Time

Standard:

15 Business Days

Reference Compound Data

PubChem ID

24898856

Name

Phentolamine hydrochloride

Measurement

89nM - IC50

PubChem ID

24277793

Name

Prazosin hydrochloride

Measurement

0.25nM - IC50

PubChem ID

197067

Name

Rauwolscine hydrochloride

Measurement

3100nM - IC50

PubChem ID

329773098

Name

WB-4101 hydrochloride, analytical standard

Measurement

6.6nM - IC50

PubChem ID

24278781

Name

Xylometazoline hydrochloride

Measurement

1200nM - IC50

PubChem ID

24277814

Name

Yohimbine hydrochloride

Measurement

1700nM - IC50

Clinical Relevance

Therapeutic Area:

CNS/Addiction/Pain

Adverse / Beneficial Action:

Adrenergic a1B receptor antagonism may cause a reduction in blood pressure as well as orthostatic hypotension.

Additional Information

Brand:

LeadHunter

Testing Location:

Taiwan - Taipei