Mediator of RNA polymerase II transcription subunit 1 also known asDRIP205 orTrap220 is a subunit of theMediator complex and is aprotein that in humans is encoded by theMED1gene.[5][6][7] MED1 functions as anuclear receptorcoactivator.
| Med1 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Identifiers | |||||||||
| Symbol | Med1 | ||||||||
| Pfam | PF10744 | ||||||||
| InterPro | IPR019680 | ||||||||
| |||||||||
The activation of gene transcription is a multistep process that is triggered by factors that recognizetranscriptional enhancer sites inDNA. These factors work with co-activators to directtranscriptional initiation by theRNA polymerase II apparatus. The mediator of RNA polymerase II transcription subunit 1 protein is a subunit of the CRSP (cofactor required forSP1 activation) complex, which, along withTFIID, is required for efficient activation by SP1. This protein is also a component of other multisubunit complexes [e.g.,thyroid hormone receptor-(TR-) associated proteins that interact with TR and facilitate TR function on DNA templates in conjunction with initiation factors and cofactors]. It also regulatesp53-dependentapoptosis and it is essential foradipogenesis. This protein is known to have the ability to self-oligomerize.[7]
MED1 has been shown tointeract with:
This entry represents subunit Med1 of the Mediator complex. The Med1 forms part of the Med9 submodule of the Srb/Med complex. It is one of three subunits essential forviability of the wholeorganism via its role in environmentally-directed cell-fate decisions.[21]