Use UniProt P48039 as the stable identity anchor, then attach disease evidence before program review.
CHEMBL1945 Target Snapshot
Melatonin receptor type 1A · SINGLE PROTEIN · Homo sapiens
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As of 2026-09-13Protein identity stays anchored to UniProt P48039. Use UniProt P48039 as the stable identity anchor, then attach disease evidence before program review.
Melatonin receptor type 1A
Review this target as Melatonin receptor type 1A, mapped to UniProt P48039. Sequence length is 350 aa.
Protein source · UniProt accession via ChEMBL component mappingCross-source identity
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This review treats Melatonin receptor type 1A as ChEMBL target CHEMBL1945, mapped to UniProt P48039. Disease framing currently uses the Open Targets-ready proxy contract.
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Start here when your first question is whether Melatonin receptor type 1A is the right protein anchor across sources, using UniProt P48039 as the stable mapping.
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Open Review-ready CardBasic Information
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| Preferred Name | Melatonin receptor type 1A |
| Target Type | SINGLE PROTEIN |
| Organism | Homo sapiens |
| UniProt | P48039 |
Next Actions
UniProt Target Context
Reviewable protein naming and mapping context for this target snapshot.
| Protein Label | Melatonin receptor type 1A |
| UniProt Accession | P48039 |
| Component Type | Protein |
| Sequence Length | 350 aa |
Melatonin receptor type 1A
How to read this target
Review this target as Melatonin receptor type 1A, mapped to UniProt P48039. Sequence length is 350 aa.
Clinical Phase Distribution
Activity Type Distribution
Top Inhibitors (by pChEMBL)
| ChEMBL ID | pChEMBL | Type | Value (nM) | Phase |
|---|---|---|---|---|
| CHEMBL132802 | 11.0 | Ki | 0.01 | Preclinical |
| CHEMBL330137 | 11.0 | Ki | 0.01 | Preclinical |
| CHEMBL287560 | 11.0 | Ki | 0.01 | Preclinical |
| CHEMBL1774529 | 10.96 | Ki | 0.011 | Preclinical |
| CHEMBL336054 | 10.92 | Ki | 0.012 | Preclinical |
| CHEMBL139855 | 10.9 | IC50 | 0.01259 | Preclinical |
| CHEMBL1774514 | 10.89 | Ki | 0.013 | Preclinical |
| CHEMBL289233 | 10.89 | Ki | 0.013 | Preclinical |
| CHEMBL1218 | 10.86 | Ki | 0.0138 | Approved |
| CHEMBL3648356 | 10.82 | EC50 | 0.015 | Preclinical |
pChEMBL Value Distribution
Approved Drugs
Assay Landscape
Binding — 224 assays, 1,120 compounds
| BAO Format | Assays | Compounds | Avg pChEMBL |
|---|---|---|---|
| cell-based format | 114 | 798 | 7.8 |
| single protein format | 97 | 128 | 8.1 |
| cell membrane format | 8 | 39 | 7.9 |
| assay format | 5 | 155 | 7.2 |
Functional — 97 assays, 167 compounds
| BAO Format | Assays | Compounds | Avg pChEMBL |
|---|---|---|---|
| cell-based format | 82 | 153 | 8.1 |
| assay format | 13 | 8 | 7.0 |
| cell membrane format | 2 | 6 | 6.6 |