OnCo

MLLT3 (MLLT3 super elongation complex subunit) is a protein that switches other genes on and off. The public catalogues list it as a fusion partner, and it is called a cancer driver by mutation analysis of patient cohorts. Tied to Leukaemia, Non-Hodgkin lymphoma and Melanoma. 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

Chromatin reader component of the super elongation complex (SEC), a complex required to increase the catalytic rate of RNA polymerase II transcription by suppressing transient pausing by the polymerase at multiple sites along the DNA. Specifically recognises and binds acylated histone H3, with a preference for histone H3 that is crotonylated. Crotonylation marks active promoters and enhancers and confers resistance to transcriptional repressors. Recognises and binds histone H3 crotonylated at 'Lys-9' (H3K9cr), and with slightly lower affinity histone H3 crotonylated at 'Lys-18' (H3K18cr). Also recognises and binds histone H3 acetylated and butyrylated at 'Lys-9' (H3K9ac and H3K9bu, respectively), but with lower affinity than crotonylated histone H3. In the SEC complex, MLLT3 is required to recruit the complex to crotonylated histones. Location: Nucleus; Chromosome (UniProt). Locus 9p21.3 (HGNC).

Where it is found
  • Leukaemia: Open Targets association 0.52 with leukaemia (MONDO_0005059)
  • Non-Hodgkin lymphoma: Open Targets association 0.52 with non-Hodgkin lymphoma (MONDO_0018908)
  • Melanoma: IntOGen driver in 1 cohort (MEL)
Class: transcription · Gene: MLLT3 · Facts checked 2026-09-23 · Target page

External identifiers

Built from HGNC, Ensembl, UniProt and ChEMBL ids

Products by modality and phase

Browse products →

No product in the corpus is aimed at this target yet.

No trial in the corpus names this target or one of its products.

Resistance routes

Unaddressed routes →

The resistance atlas has no route that names this target.

No pathway diagram carries this target as a node.

Companion diagnostics

Assay registry →

No companion diagnostic in the registry measures this target.

Preclinical models

All models →

No model entry for this target yet; check the cancer entries on the models page.

No open questions recorded for this target yet. Suggest one.

Literature

Preprints →
Latest papers · live from Europe PMC
Open in Europe PMC

Query for this target: (TITLE:"MLLT3" OR ABSTRACT:"MLLT3" OR TITLE:"MLLT3 super elongation complex subunit" OR ABSTRACT:"MLLT3 super elongation complex subunit" OR TITLE:"AF-9" OR ABSTRACT:"AF-9" OR TITLE:"AF9" OR ABSTRACT:"AF9" OR TITLE:"YEATS3" OR ABSTRACT:"YEATS3") 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 MLLT3, not a curated reading list.

Export

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/mllt3.json. Licence CC BY-NC 4.0.