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Target Snapshot

CHEMBL2104 Target Snapshot

P2X purinoceptor 4 · SINGLE PROTEIN · Homo sapiens

364Compounds
102Assays
1Approved Drugs
383.0Activities
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 Q99571. Use UniProt Q99571 as the stable identity anchor, then attach disease evidence before program review.

Review focus
Protein anchor ready

Use UniProt Q99571 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 P2X purinoceptor 4 as ChEMBL target CHEMBL2104, mapped to UniProt Q99571. Disease framing currently uses the Open Targets-ready proxy contract.

Review anchor
P2X purinoceptor 4
SINGLE PROTEIN · Homo sapiens
As of 2026-09-13
ChEMBL target ID
CHEMBL2104
Primary anchor for compounds, assays, approvals, and exports
ChEMBL 36 via Core Engine As of 2026-09-13
www.ebi.ac.uk
UniProt accession
Q99571
P2X purinoceptor 4
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

Start with the right source

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

Start here when your first question is whether P2X purinoceptor 4 is the right protein anchor across sources, using UniProt Q99571 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 LabelP2X purinoceptor 4
UniProt AccessionQ99571
Component TypeProtein
Sequence Length388 aa

P2X purinoceptor 4

Source · UniProt accession via ChEMBL component mapping
Review Cue

How to read this target

Review this target as P2X purinoceptor 4, mapped to UniProt Q99571. Sequence length is 388 aa.

Mapped IDQ99571
Review nameP2X purinoceptor 4
OrganismHomo sapiens
Clinical Profile

Clinical Phase Distribution

1
Approved
1
Phase III
1
Phase II
1
Phase I
Assay Mix

Activity Type Distribution

IC50364.0
KI1.0
EC5018.0
Lead Set

Top Inhibitors (by pChEMBL)

ChEMBL IDpChEMBLTypeValue (nM)Phase
CHEMBL4471140 8.7 IC50 2.0 Preclinical
CHEMBL4452312 8.7 IC50 2.0 Preclinical
CHEMBL4589444 8.3 IC50 5.0 Preclinical
CHEMBL4579583 8.1 IC50 8.0 Preclinical
CHEMBL4447043 8.05 IC50 9.0 Preclinical
CHEMBL4556573 8.0 IC50 10.0 Preclinical
CHEMBL4522504 8.0 IC50 10.0 Preclinical
CHEMBL4555657 7.89 IC50 13.0 Preclinical
CHEMBL4516176 7.89 IC50 13.0 Preclinical
CHEMBL4521017 7.82 IC50 15.0 Preclinical
Distribution

pChEMBL Value Distribution

42
5.0
41
5.5
46
6.0
43
6.5
37
7.0
9
7.5
5
8.0
2
8.5
0
9.0
0
9.5
pChEMBL
Assay Landscape

Assay Landscape

102
Total Assays
202
Tested Compounds
2
Assay Types
Binding — 90 assays, 202 compounds
BAO Format Assays Compounds Avg pChEMBL
cell-based format 72 199 6.1
single protein format 16 2 5.6
assay format 2 1 6.7
Functional — 12 assays, 43 compounds
BAO Format Assays Compounds Avg pChEMBL
assay format 6 8 5.3
cell-based format 6 35 5.3

Confidence Score Distribution

Source · ChEMBL 36 via Core Engine