Use UniProt P19327 as the stable identity anchor, then attach disease evidence before program review.
CHEMBL273 Target Snapshot
5-hydroxytryptamine receptor 1A · SINGLE PROTEIN · Rattus norvegicus
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As of 2026-09-13Protein identity stays anchored to UniProt P19327. Use UniProt P19327 as the stable identity anchor, then attach disease evidence before program review.
5-hydroxytryptamine receptor 1A
Review this target as 5-hydroxytryptamine receptor 1A, mapped to UniProt P19327. Sequence length is 422 aa.
Protein source · UniProt accession via ChEMBL component mappingCross-source identity
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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.
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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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Open Review-ready CardBasic Information
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| Preferred Name | 5-hydroxytryptamine receptor 1A |
| Target Type | SINGLE PROTEIN |
| Organism | Rattus norvegicus |
| UniProt | P19327 |
Next Actions
UniProt Target Context
Reviewable protein naming and mapping context for this target snapshot.
| Protein Label | 5-hydroxytryptamine receptor 1A |
| UniProt Accession | P19327 |
| Component Type | Protein |
| Sequence Length | 422 aa |
5-hydroxytryptamine receptor 1A
How to read this target
Review this target as 5-hydroxytryptamine receptor 1A, mapped to UniProt P19327. Sequence length is 422 aa.
Clinical Phase Distribution
Activity Type Distribution
Top Inhibitors (by pChEMBL)
| ChEMBL ID | pChEMBL | Type | Value (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 |
pChEMBL Value Distribution
Approved Drugs
Assay Landscape
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 | — |