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AFF4

Chr 5q31.1

ALF transcription elongation factor 4

Aliases:
AF5Q31, MCEF
MANE:
ENST00000265343.10

Annotations refreshed 10 hours ago.

Predicted protein structure

Clinical relevance (Genomics England PanelApp)

Diagnostic Grade (Green)

  • DDG2P

    MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
  • Fetal anomalies

    MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
  • Intellectual disability

    MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted

Disease associations (Open Targets)

  • Cognitive impairment-coarse facies-heart defects-obesity-pulmonary involvement-short stature-skeletal dysplasia syndrome

    0.75
  • 3q26 microduplication syndrome

    0.60
  • lung carcinoma

    0.37
  • skin basal cell carcinoma

    0.37
  • esophageal adenocarcinoma

    0.37
  • carcinoma of liver and intrahepatic biliary tract

    0.37
  • bile duct carcinoma

    0.37
  • colorectal adenocarcinoma

    0.37
  • ovarian endometrioid adenocarcinoma with squamous differentiation

    0.37
  • kidney neoplasm

    0.37

Score is the Open Targets composite evidence score (0-1). Higher = stronger gene-disease association.

Protein function (UniProt)

AF4/FMR2 family member 4

Key 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. In the SEC complex, AFF4 acts as a central scaffold that recruits other factors through direct interactions with ELL proteins (ELL, ELL2 or ELL3) and the P-TEFb complex. In case of infection by HIV-1 virus, the SEC complex is recruited by the viral Tat protein to stimulate viral gene expression

Curated MONDO disease pages that list AFF4 among their top associated genes.

Data sources: HGNC (CC BY 4.0), AlphaFold (CC BY 4.0, Jumper et al. Nature 2021), Genomics England PanelApp (CC BY 4.0), ClinGen, Open Targets (CC0), UniProt.

Not for sole clinical decision-making. Always verify against primary sources.