MED27

Mediator of RNA polymerase II transcription subunit 27 is an enzyme that in humans is encoded by the MED27 gene.^[5][6] It forms part of the Mediator complex.

AliasesMED27, CRAP34, CRSP34, CRSP8, TRAP37, MED3, mediator complex subunit 27, NEDSCAC

External IDsOMIM: 605044; MGI: 1916225; HomoloGene: 3152; GeneCards: MED27; OMA:MED27 - orthologs

Chr.Chromosome 9 (human)^[1]

End132,079,867 bp^[1]

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MED27
Identifiers
Aliases	MED27, CRAP34, CRSP34, CRSP8, TRAP37, MED3, mediator complex subunit 27, NEDSCAC
External IDs	OMIM: 605044; MGI: 1916225; HomoloGene: 3152; GeneCards: MED27; OMA:MED27 - orthologs
Gene location (Human) Chr. Chromosome 9 (human)[1] Band 9q34.13 Start 131,852,928 bp[1] End 132,079,867 bp[1]
Gene location (Mouse) Chr. Chromosome 2 (mouse)[2] Band 2 B|2 19.84 cM Start 29,236,831 bp[2] End 29,414,805 bp[2]
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in oocyte endothelial cell secondary oocyte ganglionic eminence islet of Langerhans popliteal artery tibial arteries thoracic aorta ascending aorta ventricular zone Top expressed in zygote superior surface of tongue gallbladder plantaris muscle extensor digitorum longus muscle entorhinal cortex perirhinal cortex corneal stroma secondary oocyte CA3 field More reference expression data BioGPS More reference expression data
Gene ontology Molecular function transcription coactivator activity protein binding ubiquitin protein ligase activity Cellular component mediator complex nucleolus nucleus transcription regulator complex nucleoplasm ubiquitin ligase complex cytosol Biological process regulation of transcription by RNA polymerase II stem cell population maintenance transcription initiation from RNA polymerase II promoter regulation of transcription, DNA-templated protein ubiquitination transcription, DNA-templated positive regulation of nucleic acid-templated transcription Sources:Amigo / QuickGO
Orthologs Species Human Mouse Entrez 9442 68975 Ensembl ENSG00000160563 ENSMUSG00000026799 UniProt Q6P2C8 Q9DB40 RefSeq (mRNA) NM_001253881 NM_001253882 NM_004269 NM_001290489 NM_026896 NM_029615 NM_001290490 RefSeq (protein) NP_001240810 NP_001240811 NP_004260 NP_001277418 NP_001277419 NP_081172 NP_083891 Location (UCSC) Chr 9: 131.85 – 132.08 Mb Chr 2: 29.24 – 29.41 Mb PubMed search [3] [4]
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The ubiquitous expression of Med27 mRNA suggests a universal requirement for Med27 in transcriptional initiation. Loss of Crsp34/Med27 decreases amacrine cell number, but increases the number of rod photoreceptor cells.^[7]

The activation of gene transcription is a multistep process that is triggered by factors that recognize transcriptional enhancer sites in DNA. These factors work with co-activators to direct transcriptional initiation by the RNA polymerase II apparatus. The protein encoded by this gene is a subunit of the CRSP (cofactor required for SP1 activation) complex, which, along with TFIID, 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 which interact with TR and facilitate TR function on DNA templates in conjunction with initiation factors and cofactors.^[6]