Molecular Target Synopsis
Domains and Structures
Drugs and Clinical Candidates
Ligand Efficiency Plot
Family Cladogram
Interaction Network
Gene Expression
Gene Copy Number Variation
Germline Genetics

AFF4 (Q9UHB7) - Overview - Molecular Target Synopsis


AFF4, AF4/FMR2 family member 4
UniProt Q9UHB7

Also Known as AFF4_HUMAN, AFF4, AF5Q31, MCEF

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. Interacts with ELL3; the interaction is direct (By similarity). Interacts with ELL2; the interaction is direct and leads to stabilize ELL2 and prevent ELL2 ubiquitination and degradation. Component of the super elongation complex (SEC), at least composed of EAF1, EAF2, CDK9, MLLT3/AF9, AFF (AFF1 or AFF4), the P-TEFb complex and ELL (ELL, ELL2 or ELL3). Interacts with ELL.

Inspect Structure
See all 3D Structures for AFF4

Isoforms / Transcripts (Protein Coding)

Sub-cellular localization

UniProt: AFF4 is active in the following subcellular-locations: nucleus.
GO terms: AFF4 is active in the following subcellular-locations: ELL-EAF complex, fibrillar center, nucleoplasm, nucleus, transcription elongation factor complex, transcriptionally active chromatin.

GO terms

Gene Copy Number Variation

In COSMIC - Cell Lines Project AFF4 has gain in 0 cell-lines, loss in 1 cell-lines and no signal in 1003 cell-lines. (see details)

Gene Expression

In NCI60, the highest expressing cell lines are: SF_539, MDA_N, OVCAR_4

In Array Express (RNA-seq of 675 commonly used human cancer cell lines), the highest expressing cell lines are: SK-N-FI, Hs 746T, KP4

In Array Express (RNA-seq of long poly adenylated RNA and long non poly adenylated RNA from ENCODE cell lines), the highest expressing cell lines are: NHLF, HSMM, HMEC

(see details)

3D Structures

For AFF4 there are:
7 structures (12 chains) solved
0 are solved in complex with at least one small molecule ligand

(see details)
Molecular Target 3D Synopsis

Screening and Chemistry

AFF4 has been screened with compounds ( bioactivities). (see details)