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Target Snapshot

CHEMBL4701 Target Snapshot

Histamine H1 receptor · SINGLE PROTEIN · Rattus norvegicus

208Compounds
68Assays
29Approved Drugs
234.0Activities
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 P31390. Use UniProt P31390 as the stable identity anchor, then attach disease evidence before program review.

Review focus
Protein anchor ready

Use UniProt P31390 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 Histamine H1 receptor as ChEMBL target CHEMBL4701, mapped to UniProt P31390. Disease framing currently uses the Open Targets-ready proxy contract.

Review anchor
Histamine H1 receptor
SINGLE PROTEIN · Rattus norvegicus
As of 2026-09-13
ChEMBL target ID
CHEMBL4701
Primary anchor for compounds, assays, approvals, and exports
ChEMBL 36 via Core Engine As of 2026-09-13
www.ebi.ac.uk
UniProt accession
P31390
Histamine H1 receptor
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

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UniProt Target Context
UniProt accession via ChEMBL component mapping

Start here when your first question is whether Histamine H1 receptor is the right protein anchor across sources, using UniProt P31390 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 LabelHistamine H1 receptor
UniProt AccessionP31390
Component TypeProtein
Sequence Length486 aa

Histamine H1 receptor

Source · UniProt accession via ChEMBL component mapping
Review Cue

How to read this target

Review this target as Histamine H1 receptor, mapped to UniProt P31390. Sequence length is 486 aa.

Mapped IDP31390
Review nameHistamine H1 receptor
OrganismRattus norvegicus
Clinical Profile

Clinical Phase Distribution

29
Approved
3
Phase II
Assay Mix

Activity Type Distribution

IC5061.0
KI149.0
EC5015.0
KD9.0
Lead Set

Top Inhibitors (by pChEMBL)

ChEMBL IDpChEMBLTypeValue (nM)Phase
CHEMBL629 10.7 IC50 0.02 Approved
CHEMBL445 10.3 IC50 0.05 Approved
CHEMBL11 10.22 IC50 0.06 Approved
CHEMBL415 9.7 IC50 0.2 Approved
CHEMBL715 9.52 Ki 0.3 Approved
CHEMBL414174 9.3 Ki 0.5012 Preclinical
CHEMBL72 9.1 IC50 0.8 Approved
CHEMBL643 9.0 Ki 1.0 Approved
CHEMBL908 8.97 IC50 1.072 Approved
CHEMBL46683 8.91 Ki 1.22 Preclinical
Distribution

pChEMBL Value Distribution

12
5.0
17
5.5
19
6.0
29
6.5
21
7.0
15
7.5
34
8.0
8
8.5
3
9.0
2
9.5
pChEMBL
Approved Drugs

Approved Drugs

ZIPRASIDONE
CHEMBL708
Approved 2001
QUETIAPINE
CHEMBL716
Approved 1997
OLANZAPINE
CHEMBL715
Approved 1996
LORATADINE
CHEMBL998
Approved 1993
RISPERIDONE
CHEMBL85
Approved 1993
CLOMIPRAMINE
CHEMBL415
Approved 1989
CLOZAPINE
CHEMBL42
Approved 1989
AZATADINE
CHEMBL946
Approved 1977
LOXAPINE
CHEMBL831
Approved 1975
PYRILAMINE
CHEMBL511
Approved 1973
CHLORPROTHIXENE
CHEMBL908
Approved 1967
HALOPERIDOL
CHEMBL54
Approved 1967
DESIPRAMINE
CHEMBL72
Approved 1964
NORTRIPTYLINE
CHEMBL445
Approved 1964
THIORIDAZINE
CHEMBL479
Approved 1962
AMITRIPTYLINE
CHEMBL629
Approved 1961
IMIPRAMINE
CHEMBL11
Approved 1959
ORPHENADRINE
CHEMBL900
Approved 1957
PROMETHAZINE
CHEMBL643
Approved 1951
CHLORPHENIRAMINE
CHEMBL505
Approved 1950
HISTAMINE
CHEMBL90
Approved 1939
Assay Landscape

Assay Landscape

68
Total Assays
144
Tested Compounds
2
Assay Types
Binding — 44 assays, 144 compounds
BAO Format Assays Compounds Avg pChEMBL
single protein format 14 22 7.8
tissue-based format 13 24 7.6
assay format 9 38 7.2
cell membrane format 8 60 6.5
Functional — 24 assays, 11 compounds
BAO Format Assays Compounds Avg pChEMBL
tissue-based format 24 11 7.2

Confidence Score Distribution

Source · ChEMBL 36 via Core Engine