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Target Snapshot

CHEMBL273 Target Snapshot

5-hydroxytryptamine receptor 1A · SINGLE PROTEIN · Rattus norvegicus

6,024Compounds
658Assays
125Approved Drugs
7,702.0Activities
Free Research Context

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Broader Open DB context

Frame the target before identity details

Structured disease, protein, and project context should read before the lower-level identity rail.

As of 2026-09-13

Protein identity stays anchored to UniProt P19327. Use UniProt P19327 as the stable identity anchor, then attach disease evidence before program review.

Review focus
Protein anchor ready

Use UniProt P19327 as the stable identity anchor, then attach disease evidence before program review.

ChEMBL component mapping + Open Targets-ready proxy + ChEMBL 36 via Core Engine 2026-09-13
Open source guide
Identity Layer

Cross-source identity

Keep the review anchor, source IDs, and context contract aligned before reusing this target elsewhere.

This review treats 5-hydroxytryptamine receptor 1A as ChEMBL target CHEMBL273, mapped to UniProt P19327. Disease framing currently uses the Open Targets-ready proxy contract.

Review anchor
5-hydroxytryptamine receptor 1A
SINGLE PROTEIN · Rattus norvegicus
As of 2026-09-13
ChEMBL target ID
CHEMBL273
Primary anchor for compounds, assays, approvals, and exports
ChEMBL 36 via Core Engine As of 2026-09-13
www.ebi.ac.uk
UniProt accession
P19327
5-hydroxytryptamine receptor 1A
UniProt accession via ChEMBL component mapping As of 2026-09-13
www.uniprot.org
Disease evidence contract
Open Targets-ready proxy
ChEMBL drug mechanism + indication proxy
ChEMBL drug mechanism + indication proxy As of 2026-09-13
www.ebi.ac.uk

Reuse the same identifiers in notes, watch rules, exports, and review packs so provenance stays stable across surfaces.

Source Guidance

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UniProt Target Context
UniProt accession via ChEMBL component mapping

Start here when your first question is whether 5-hydroxytryptamine receptor 1A is the right protein anchor across sources, using UniProt P19327 as the stable mapping.

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Disease Relevance & Evidence Level
ChEMBL drug mechanism + indication proxy

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Evidence Card
Review-ready rationale with source-aware context

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Overview

Basic Information

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UniProt Context

UniProt Target Context

Reviewable protein naming and mapping context for this target snapshot.

Protein Label5-hydroxytryptamine receptor 1A
UniProt AccessionP19327
Component TypeProtein
Sequence Length422 aa

5-hydroxytryptamine receptor 1A

Source · UniProt accession via ChEMBL component mapping
Review Cue

How to read this target

Review this target as 5-hydroxytryptamine receptor 1A, mapped to UniProt P19327. Sequence length is 422 aa.

Mapped IDP19327
Review name5-hydroxytryptamine receptor 1A
OrganismRattus norvegicus
Clinical Profile

Clinical Phase Distribution

125
Approved
14
Phase III
57
Phase II
1
Phase I
Assay Mix

Activity Type Distribution

IC502,035.0
KI5,628.0
EC5026.0
KD13.0
Lead Set

Top Inhibitors (by pChEMBL)

ChEMBL IDpChEMBLTypeValue (nM)Phase
CHEMBL3884161 11.0 Ki 0.01 Preclinical
CHEMBL186423 11.0 IC50 0.01 Preclinical
CHEMBL3764390 10.95 Ki 0.0113 Preclinical
CHEMBL2387253 10.92 Ki 0.012 Preclinical
CHEMBL2112779 10.7 Ki 0.02 Preclinical
CHEMBL3885003 10.7 Ki 0.02 Preclinical
CHEMBL189384 10.68 Ki 0.021 Preclinical
CHEMBL83625 10.68 IC50 0.021 Preclinical
CHEMBL2112780 10.59 Ki 0.026 Preclinical
CHEMBL2112778 10.55 Ki 0.028 Preclinical
Distribution

pChEMBL Value Distribution

190
5.0
345
5.5
559
6.0
761
6.5
896
7.0
857
7.5
741
8.0
517
8.5
338
9.0
101
9.5
pChEMBL
Approved Drugs

Approved Drugs

GEPIRONE
CHEMBL284092
Approved 2023
FLIBANSERIN
CHEMBL231068
Approved 2015
BREXPIPRAZOLE
CHEMBL2105760
Approved 2015
VILAZODONE
CHEMBL439849
Approved 2011
LURASIDONE
CHEMBL1237021
Approved 2010
ARIPIPRAZOLE
CHEMBL1112
Approved 2002
APOMORPHINE
CHEMBL53
Approved 2001
QUETIAPINE
CHEMBL716
Approved 1997
OLANZAPINE
CHEMBL715
Approved 1996
CARVEDILOL
CHEMBL723
Approved 1995
NEFAZODONE
CHEMBL623
Approved 1994
RISPERIDONE
CHEMBL85
Approved 1993
SUMATRIPTAN
CHEMBL128
Approved 1992
MOXONIDINE
CHEMBL19236
Approved 1991
DILEVALOL
CHEMBL27193
Approved 1990
CLOZAPINE
CHEMBL42
Approved 1989
PROPAFENONE
CHEMBL631
Approved 1989
ASTEMIZOLE
CHEMBL296419
Approved 1988
PERGOLIDE
CHEMBL531
Approved 1988
PENBUTOLOL
CHEMBL1290
Approved 1987
OXYMETAZOLINE
CHEMBL762
Approved 1986
BUSPIRONE HYDROCHLORIDE
CHEMBL1200399
Approved 1986
BUSPIRONE
CHEMBL49
Approved 1986
LABETALOL
CHEMBL429
Approved 1984
OXPRENOLOL
CHEMBL546
Approved 1983
PINDOLOL
CHEMBL500
Approved 1982
TRAZODONE
CHEMBL621
Approved 1981
SULOCTIDIL
CHEMBL404849
Approved 1979
BROMOCRIPTINE
CHEMBL493
Approved 1978
TIMOLOL
CHEMBL499
Approved 1978
DROPERIDOL
CHEMBL1108
Approved 1970
DOXEPIN
CHEMBL1628227
Approved 1969
HALOPERIDOL
CHEMBL54
Approved 1967
PROPRANOLOL
CHEMBL27
Approved 1967
THIORIDAZINE
CHEMBL479
Approved 1962
METHYSERGIDE
CHEMBL1065
Approved 1962
CYPROHEPTADINE
CHEMBL516
Approved 1961
TRIFLUOPERAZINE
CHEMBL422
Approved 1959
FLUPHENAZINE
CHEMBL726
Approved 1959
CHLORPROMAZINE
CHEMBL71
Approved 1957
PROCHLORPERAZINE
CHEMBL728
Approved 1956
ERGOTAMINE
CHEMBL442
Approved 1948
DIHYDROERGOTAMINE
CHEMBL1732
Approved 1946
METHYLERGONOVINE
CHEMBL1201356
Approved 1946
Assay Landscape

Assay Landscape

658
Total Assays
4,698
Tested Compounds
2
Assay Types
Binding — 557 assays, 4,698 compounds
BAO Format Assays Compounds Avg pChEMBL
tissue-based format 243 1,682 7.3
single protein format 123 829 7.6
cell membrane format 101 914 7.4
assay format 62 986 7.3
cell-based format 19 241 8.2
organism-based format 8 8 8.4
subcellular format 1 38 8.5
Functional — 101 assays, 88 compounds
BAO Format Assays Compounds Avg pChEMBL
assay format 44 10 7.2
organism-based format 24 0
tissue-based format 17 57 7.8
cell membrane format 14 21 7.7
cell-based format 2 0

Confidence Score Distribution

Source · ChEMBL 36 via Core Engine