OnCo

MAPK3 (Mitogen-activated protein kinase 3) is a protein kinase, an enzyme that switches other proteins on by adding phosphate groups. The public catalogues list it as a drug target, and clinical evidence ties its variants to diagnosis, prognosis or drug response. This dossier gathers the 0 products (0 approved), 0 trials, 0 pathways and 0 resistance routes in the corpus that involve it, with external identifiers so it can be joined to UniProt, ChEMBL, Open Targets and the rest of biology.

Biology

Serine/threonine kinase which acts as an essential component of the MAP kinase signal transduction pathway. MAPK1/ERK2 and MAPK3/ERK1 are the 2 MAPKs which play an important role in the MAPK/ERK cascade. They participate also in a signalling cascade initiated by activated KIT and KITLG/SCF. Depending on the cellular context, the MAPK/ERK cascade mediates diverse biological functions such as cell growth, adhesion, survival and differentiation through the regulation of transcription, translation, cytoskeletal rearrangements. The MAPK/ERK cascade also plays a role in initiation and regulation of meiosis, mitosis, and postmitotic functions in differentiated cells by phosphorylating a number of transcription factors. About 160 substrates have already been discovered for ERKs. Location: Cytoplasm; Nucleus; Membrane, caveola; Cell junction, focal adhesion (UniProt). Locus 16p11.2 (HGNC).

Class: kinase · Gene: MAPK3 · Facts checked 2026-09-23 · Target page

External identifiers

Built from HGNC, Ensembl, UniProt and ChEMBL ids

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Resistance routes

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Companion diagnostics

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Preclinical models

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Literature

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Query for this target: (TITLE:"MAPK3" OR ABSTRACT:"MAPK3" OR TITLE:"mitogen-activated protein kinase 3" OR ABSTRACT:"mitogen-activated protein kinase 3" OR TITLE:"Mitogen-activated protein kinase 3" OR ABSTRACT:"Mitogen-activated protein kinase 3" OR TITLE:"ERK1" OR ABSTRACT:"ERK1" OR TITLE:"p44mapk" OR ABSTRACT:"p44mapk" OR TITLE:"p44erk1" OR ABSTRACT:"p44erk1") AND (cancer OR tumor OR tumour OR oncology OR carcinoma OR lymphoma OR leukemia OR leukaemia OR myeloma OR sarcoma OR melanoma OR glioma). Results are unfiltered search hits about MAPK3, not a curated reading list.

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The dossier as machine-readable JSON: identifiers from HGNC, Ensembl, UniProt and ChEMBL, products with status, trials, pathways, hotspots, open questions and assays. The full entity record is in the open API at /api/v1/entities/mapk3.json. Licence CC BY-NC 4.0.