MED20

MED20 is a component of the mediator complex (also known as TRAP, SMCC, DRIP, or ARC), a transcriptional coactivator complex thought to be required for the expression of almost all genes. The mediator complex is recruited by transcriptional activators or nuclear receptors to induce gene expression, by interacting with RNA polymerase II and promoting the formation of a transcriptional pre-initiation complex. A mutation in MED20 has been associated with a novel infantile-onset neurodegenerative movement disorder.

Full Name

Mediator Complex Subunit 20

Function

Component of the Mediator complex, a coactivator involved in the regulated transcription of nearly all RNA polymerase II-dependent genes. Mediator functions as a bridge to convey information from gene-specific regulatory proteins to the basal RNA polymerase II transcription machinery. Mediator is recruited to promoters by direct interactions with regulatory proteins and serves as a scaffold for the assembly of a functional preinitiation complex with RNA polymerase II and the general transcription factors.

Biological Process

Positive regulation of transcription elongation from RNA polymerase II promoter Source: ComplexPortal
Positive regulation of transcription initiation from RNA polymerase II promoter Source: ComplexPortal
Regulation of transcription by RNA polymerase II Source: GO_Central
RNA polymerase II preinitiation complex assembly Source: ComplexPortal
Transcription, DNA-templated Source: UniProtKB
Transcription by RNA polymerase II Source: ProtInc

Cellular Location

Nucleus