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Evidence Snapshot

Histamine H3 receptor

CHEMBL4124 SINGLE PROTEIN Rattus norvegicus
Source Header

ChEMBL 36 via Core Engine

Target Snapshot 2026-09-14T03:22:09Z
Source · ChEMBL 36 via Core Engine
ChEMBL ChEMBL 36 CHEMBL4124
Identity Layer

Cross-source identity

Keep the review anchor, source IDs, and context contract aligned before reusing this target elsewhere.

This review treats Histamine H3 receptor as ChEMBL target CHEMBL4124, mapped to UniProt Q9QYN8. Disease framing currently uses the Open Targets-ready proxy contract.

Review anchor
Histamine H3 receptor
SINGLE PROTEIN · Rattus norvegicus
As of 2026-09-14
ChEMBL target ID
CHEMBL4124
Primary anchor for compounds, assays, approvals, and exports
ChEMBL 36 via Core Engine As of 2026-09-14
www.ebi.ac.uk
UniProt accession
Q9QYN8
Histamine H3 receptor
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.

Review-ready Target Rationale

Why Histamine H3 receptor matters

As of 2026-09-14

Histamine H3 receptor is reviewed as Histamine H3 receptor (UniProt Q9QYN8); the current evidence base includes 3 approved drugs, 1870 compounds, and 276 assays, with lead potency reaching pChEMBL 10.7.

Disease context
Disease signal

Disease relevance is not yet populated for this evidence card.

This disease block keeps the Open Targets-ready contract explicit while current evidence comes from ChEMBL mechanism and indication mappings.

ChEMBL target record
Activity base
Portfolio and assay base

ChEMBL currently tracks 3 approved drugs, 1870 compounds, and 276 assays for this target. The dominant activity type is KI. CHEMBL2386729 is the current potency anchor at pChEMBL 10.7.

Use CHEMBL2386729 as the tractability anchor when discussing potency (pChEMBL 10.7).

Activity source · ChEMBL 36 via Core Engine
3 approved pChEMBL 10.7
Source Guidance

Start with the right source

Pick the first block or linked source that matches the review question in front of you.

Need the shortest review narrative first?
Review-ready Target Rationale
One-page rationale with as-of-date and attribution

Start with the review rationale when you need to explain why Histamine H3 receptor matters before drilling into raw source blocks.

Jump to Review Rationale
Need stable protein naming or accession mapping?
UniProt Target Context
UniProt accession via ChEMBL component mapping

Go back to the target snapshot when you need the naming and mapping contract behind UniProt Q9QYN8, not just the summarized rationale.

Open Protein Context
Need disease fit or evidence level for program framing?
Disease Relevance & Evidence Level
ChEMBL drug mechanism + indication proxy

Use the target snapshot disease block when you need the disease program and supporting signals, not only the card summary.

Open Disease Context

Snapshot State

No project snapshot selected. Export uses the live evidence card state.

1870
Total Compounds
276
Total Assays
3
Approved Drugs
IC50: 13.0, KI: 2347.0, EC50: 42.0, KD: 36.0
Activity Types

pChEMBL Activity Distribution

Top 5 Inhibitors (by pChEMBL)

Structure Compound pChEMBL Type Phase
No preferred name
CHEMBL2386729
 10.7 Ki —
No preferred name
CHEMBL2386727
 10.5 Ki —
No preferred name
CHEMBL270011
 10.3 Ki —
No preferred name
CHEMBL2386728
 10.3 Ki —
No preferred name
CHEMBL255962
 10.3 Ki —

Approved Drugs

Structure Compound First Approval
PITOLISANT
CHEMBL462605
 2016
CIPROFLOXACIN
CHEMBL8
 1987
HISTAMINE
CHEMBL90
 1939
← Target Page
Source Header

ChEMBL 36 via Core Engine

Target Snapshot 2026-09-14T03:22:09Z
Source · ChEMBL 36 via Core Engine
ChEMBL ChEMBL 36 CHEMBL4124