Use UniProt P23458 as the stable identity anchor, then attach disease evidence before program review.
CHEMBL3301391 Target Snapshot
JAK1/TYK2 · PROTEIN COMPLEX · Homo sapiens
Research home keeps recent targets
This target will appear in recent viewed items on this browser. Use the demo workspace to preview watch rules and decision queues.
Switch target
Move to another high-traffic target or paste a specific ChEMBL target ID.
Frame the target before identity details
Structured disease, protein, and project context should read before the lower-level identity rail.
As of 2026-09-13Protein identity stays anchored to UniProt P23458. Use UniProt P23458 as the stable identity anchor, then attach disease evidence before program review.
Tyrosine-protein kinase JAK1
Review this target as JAK1/TYK2, mapped to UniProt P23458. ChEMBL maps the protein component as Tyrosine-protein kinase JAK1. Sequence length is 1154 aa.
Protein source · UniProt accession via ChEMBL component mappingCross-source identity
Keep the review anchor, source IDs, and context contract aligned before reusing this target elsewhere.
This review treats JAK1/TYK2 as ChEMBL target CHEMBL3301391, mapped to UniProt P23458. Disease framing currently uses the Open Targets-ready proxy contract.
Reuse the same identifiers in notes, watch rules, exports, and review packs so provenance stays stable across surfaces.
Start with the right source
Choose the first block or source based on the question you are trying to answer.
Start here when your first question is whether JAK1/TYK2 is the right protein anchor across sources, using UniProt P23458 as the stable mapping.
Jump to Protein ContextUse this block first when you need the strongest disease program and evidence level in one place.
Jump to Disease ContextOpen the one-page evidence card when you want the rationale, activity base, and attribution together.
Open Review-ready CardBasic Information
Verify identity, organism, and the fastest next research jumps from the same page.
| Preferred Name | JAK1/TYK2 |
| Target Type | PROTEIN COMPLEX |
| Organism | Homo sapiens |
| UniProt | P23458 |
Next Actions
UniProt Target Context
Reviewable protein naming and mapping context for this target snapshot.
| Protein Label | Tyrosine-protein kinase JAK1 |
| UniProt Accession | P23458 |
| Component Type | Protein |
| Sequence Length | 1154 aa |
Tyrosine-protein kinase JAK1
How to read this target
Review this target as JAK1/TYK2, mapped to UniProt P23458. ChEMBL maps the protein component as Tyrosine-protein kinase JAK1. Sequence length is 1154 aa.
Clinical Phase Distribution
Activity Type Distribution
Top Inhibitors (by pChEMBL)
| ChEMBL ID | pChEMBL | Type | Value (nM) | Phase |
|---|---|---|---|---|
| CHEMBL4440718 | 9.28 | IC50 | 0.53 | Preclinical |
| CHEMBL3301607 | 8.95 | IC50 | 1.127 | Approved |
| CHEMBL4444178 | 8.89 | IC50 | 1.3 | Preclinical |
| CHEMBL3622821 | 8.4 | IC50 | 4.0 | Approved |
| CHEMBL4557190 | 8.4 | IC50 | 4.0 | Preclinical |
| CHEMBL4435170 | 8.3 | IC50 | 5.0 | Approved |
| CHEMBL4469750 | 8.22 | IC50 | 6.0 | Preclinical |
| CHEMBL4457060 | 8.15 | IC50 | 7.0 | Preclinical |
| CHEMBL4571117 | 8.1 | IC50 | 8.0 | Preclinical |
| CHEMBL4572855 | 8.1 | IC50 | 8.0 | Preclinical |
pChEMBL Value Distribution
Approved Drugs
Assay Landscape
Binding — 50 assays, 155 compounds
| BAO Format | Assays | Compounds | Avg pChEMBL |
|---|---|---|---|
| cell-based format | 31 | 71 | 7.0 |
| tissue-based format | 10 | 17 | 6.5 |
| protein complex format | 8 | 41 | 6.6 |
| assay format | 1 | 26 | 6.6 |