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Target Snapshot

CHEMBL4803 Target Snapshot

Nitric oxide synthase 3 · SINGLE PROTEIN · Homo sapiens

1,227Compounds
162Assays
1Approved Drugs
1,284.0Activities
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 P29474. Use UniProt P29474 as the stable identity anchor, then attach disease evidence before program review.

Review focus
Protein anchor ready

Use UniProt P29474 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 Nitric oxide synthase 3 as ChEMBL target CHEMBL4803, mapped to UniProt P29474. Disease framing currently uses the Open Targets-ready proxy contract.

Review anchor
Nitric oxide synthase 3
SINGLE PROTEIN · Homo sapiens
As of 2026-09-14
ChEMBL target ID
CHEMBL4803
Primary anchor for compounds, assays, approvals, and exports
ChEMBL 36 via Core Engine As of 2026-09-14
www.ebi.ac.uk
UniProt accession
P29474
Nitric oxide synthase 3
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

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UniProt Target Context
UniProt accession via ChEMBL component mapping

Start here when your first question is whether Nitric oxide synthase 3 is the right protein anchor across sources, using UniProt P29474 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 LabelNitric oxide synthase 3
UniProt AccessionP29474
Component TypeProtein
Sequence Length1203 aa

Nitric oxide synthase 3

Source · UniProt accession via ChEMBL component mapping
Review Cue

How to read this target

Review this target as Nitric oxide synthase 3, mapped to UniProt P29474. Sequence length is 1203 aa.

Mapped IDP29474
Review nameNitric oxide synthase 3
OrganismHomo sapiens
Clinical Profile

Clinical Phase Distribution

1
Approved
2
Phase III
3
Phase II
2
Phase I
Assay Mix

Activity Type Distribution

IC50902.0
KI269.0
EC50113.0
Lead Set

Top Inhibitors (by pChEMBL)

ChEMBL IDpChEMBLTypeValue (nM)Phase
CHEMBL105792 7.75 Ki 18.0 Preclinical
CHEMBL1800346 7.73 Ki 18.62 Preclinical
CHEMBL483091 7.66 Ki 22.0 Preclinical
CHEMBL106871 7.62 Ki 24.0 Preclinical
CHEMBL227744 7.52 Ki 30.0 Preclinical
CHEMBL302657 7.47 IC50 34.0 Preclinical
CHEMBL321691 7.41 Ki 39.0 Preclinical
CHEMBL59925 7.35 IC50 44.67 Preclinical
CHEMBL294084 7.31 IC50 49.0 Preclinical
CHEMBL8365 7.3 IC50 50.0 Preclinical
Distribution

pChEMBL Value Distribution

215
5.0
96
5.5
72
6.0
32
6.5
15
7.0
5
7.5
0
8.0
0
8.5
0
9.0
0
9.5
pChEMBL
Assay Landscape

Assay Landscape

162
Total Assays
801
Tested Compounds
3
Assay Types
Binding — 152 assays, 801 compounds
BAO Format Assays Compounds Avg pChEMBL
single protein format 103 529 5.1
cell-based format 41 237 5.1
assay format 7 35 4.7
tissue-based format 1 0
ADME — 6 assays, 52 compounds
BAO Format Assays Compounds Avg pChEMBL
assay format 5 51 4.8
single protein format 1 1
Functional — 4 assays, 35 compounds
BAO Format Assays Compounds Avg pChEMBL
cell-based format 3 35 5.4
assay format 1 0

Confidence Score Distribution

Source · ChEMBL 36 via Core Engine