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Target Snapshot

CHEMBL2632 Target Snapshot

HLA class I histocompatibility antigen, A alpha chain · SINGLE PROTEIN · Homo sapiens

160Compounds
4Assays
4Approved Drugs
161.0Activities
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 2026-09-14

Protein identity stays anchored to UniProt P04439. Use UniProt P04439 as the stable identity anchor, then attach disease evidence before program review.

Review focus
Protein anchor ready

Use UniProt P04439 as the stable identity anchor, then attach disease evidence before program review.

ChEMBL component mapping + Open Targets-ready proxy + ChEMBL 36 via Core Engine 2026-09-14
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 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.

Review anchor
HLA class I histocompatibility antigen, A alpha chain
SINGLE PROTEIN · Homo sapiens
As of 2026-09-14
ChEMBL target ID
CHEMBL2632
Primary anchor for compounds, assays, approvals, and exports
ChEMBL 36 via Core Engine As of 2026-09-14
www.ebi.ac.uk
UniProt accession
P04439
HLA class I histocompatibility antigen, A alpha chain
UniProt accession via ChEMBL component mapping As of 2026-09-14
www.uniprot.org
Disease evidence contract
Open Targets-ready proxy
ChEMBL drug mechanism + indication proxy
ChEMBL drug mechanism + indication proxy As of 2026-09-14
www.ebi.ac.uk

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

Source Guidance

Start with the right source

Choose the first block or source based on the question you are trying to answer.

Need stable target naming and protein identity?
UniProt Target Context
UniProt accession via ChEMBL component mapping

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.

Jump to Protein Context
Need disease fit before discussing compounds?
Disease Relevance & Evidence Level
ChEMBL drug mechanism + indication proxy

Use this block first when you need the strongest disease program and evidence level in one place.

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Evidence Card
Review-ready rationale with source-aware context

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Overview

Basic Information

Verify identity, organism, and the fastest next research jumps from the same page.

UniProt Context

UniProt Target Context

Reviewable protein naming and mapping context for this target snapshot.

Protein LabelHLA class I histocompatibility antigen, A alpha chain
UniProt AccessionP04439
Component TypeProtein
Sequence Length365 aa

HLA class I histocompatibility antigen, A alpha chain

Source · UniProt accession via ChEMBL component mapping
Review Cue

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.

Mapped IDP04439
Review nameHLA class I histocompatibility antigen, A alpha chain
OrganismHomo sapiens
Clinical Profile

Clinical Phase Distribution

4
Approved
1
Phase III
3
Phase II
Assay Mix

Activity Type Distribution

IC50152.0
KD9.0
Lead Set

Top Inhibitors (by pChEMBL)

ChEMBL IDpChEMBLTypeValue (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
Distribution

pChEMBL Value Distribution

8
5.0
12
5.5
23
6.0
31
6.5
33
7.0
27
7.5
18
8.0
4
8.5
0
9.0
0
9.5
pChEMBL
Assay Landscape

Assay Landscape

4
Total Assays
159
Tested Compounds
1
Assay Types
Binding — 4 assays, 159 compounds
BAO Format Assays Compounds Avg pChEMBL
single protein format 4 159 7.0

Confidence Score Distribution

Source · ChEMBL 36 via Core Engine