Use UniProt P04439 as the stable identity anchor, then attach disease evidence before program review.
CHEMBL2632 Target Snapshot
HLA class I histocompatibility antigen, A alpha chain · SINGLE PROTEIN · Homo sapiens
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As of 2026-09-14Protein identity stays anchored to UniProt P04439. Use UniProt P04439 as the stable identity anchor, then attach disease evidence before program review.
HLA class I histocompatibility antigen, A alpha chain
Review this target as HLA class I histocompatibility antigen, A alpha chain, mapped to UniProt P04439. Sequence length is 365 aa.
Protein source · UniProt accession via ChEMBL component mappingCross-source identity
Keep the review anchor, source IDs, and context contract aligned before reusing this target elsewhere.
This review treats HLA class I histocompatibility antigen, A alpha chain as ChEMBL target CHEMBL2632, mapped to UniProt P04439. Disease framing currently uses the Open Targets-ready proxy contract.
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Start here when your first question is whether HLA class I histocompatibility antigen, A alpha chain is the right protein anchor across sources, using UniProt P04439 as the stable mapping.
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Open Review-ready CardBasic Information
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| Preferred Name | HLA class I histocompatibility antigen, A alpha chain |
| Target Type | SINGLE PROTEIN |
| Organism | Homo sapiens |
| UniProt | P04439 |
Next Actions
UniProt Target Context
Reviewable protein naming and mapping context for this target snapshot.
| Protein Label | HLA class I histocompatibility antigen, A alpha chain |
| UniProt Accession | P04439 |
| Component Type | Protein |
| Sequence Length | 365 aa |
HLA class I histocompatibility antigen, A alpha chain
How to read this target
Review this target as HLA class I histocompatibility antigen, A alpha chain, mapped to UniProt P04439. Sequence length is 365 aa.
Clinical Phase Distribution
Activity Type Distribution
Top Inhibitors (by pChEMBL)
| ChEMBL ID | pChEMBL | Type | Value (nM) | Phase |
|---|---|---|---|---|
| CHEMBL402482 | 8.77 | IC50 | 1.698 | Preclinical |
| CHEMBL412034 | 8.7 | IC50 | 2.0 | Preclinical |
| CHEMBL410648 | 8.66 | IC50 | 2.198 | Preclinical |
| CHEMBL415611 | 8.64 | IC50 | 2.301 | Preclinical |
| CHEMBL386178 | 8.49 | IC50 | 3.199 | Preclinical |
| CHEMBL386299 | 8.49 | IC50 | 3.199 | Preclinical |
| CHEMBL426344 | 8.48 | IC50 | 3.304 | Preclinical |
| CHEMBL402481 | 8.4 | IC50 | 3.999 | Preclinical |
| CHEMBL122183 | 8.37 | IC50 | 4.295 | Preclinical |
| CHEMBL110989 | 8.35 | IC50 | 4.498 | Preclinical |
pChEMBL Value Distribution
Assay Landscape
Binding — 4 assays, 159 compounds
| BAO Format | Assays | Compounds | Avg pChEMBL |
|---|---|---|---|
| single protein format | 4 | 159 | 7.0 |