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Aliases MED14, CRSP150, CRSP2, CSRP, CXorf4, DRIP150, EXLM1, RGR1, TRAP170, mediator complex subunit 14
External IDs MGI: 1349442 HomoloGene: 22082 GeneCards: MED14
RNA expression pattern
PBB GE CRSP2 202612 s at fs.png

PBB GE CRSP2 202611 s at fs.png

PBB GE CRSP2 202610 s at fs.png
More reference expression data
Species Human Mouse
RefSeq (mRNA)



RefSeq (protein)



Location (UCSC) Chr X: 40.65 – 40.74 Mb Chr X: 12.68 – 12.76 Mb
PubMed search [1] [2]
View/Edit Human View/Edit Mouse

Mediator of RNA polymerase II transcription subunit 14 is an enzyme that in humans is encoded by the MED14 gene.[3][4][5]

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. This protein contains a bipartite nuclear localization signal. This gene is known to escape chromosome X-inactivation.[5]


MED14 has been shown to interact with PPARGC1A,[6] Estrogen receptor alpha,[7] STAT2,[8] Cyclin-dependent kinase 8,[9][10] Glucocorticoid receptor[11] and Hepatocyte nuclear factor 4 alpha.[12][13]


  1. ^ "Human PubMed Reference:". 
  2. ^ "Mouse PubMed Reference:". 
  3. ^ Ryu S, Zhou S, Ladurner AG, Tjian R (Feb 1999). "The transcriptional cofactor complex CRSP is required for activity of the enhancer-binding protein Sp1". Nature. 397 (6718): 446–50. doi:10.1038/17141. PMID 9989412. 
  4. ^ Yoshikawa H, Fujiyama A, Nakai K, Inazawa J, Matsubara K (Aug 1998). "Detection and isolation of a novel human gene located on Xp11.2-p11.4 that escapes X-inactivation using a two-dimensional DNA mapping method". Genomics. 49 (2): 237–46. doi:10.1006/geno.1998.5246. PMID 9598311. 
  5. ^ a b "Entrez Gene: CRSP2 cofactor required for Sp1 transcriptional activation, subunit 2, 150kDa". 
  6. ^ Wallberg, Annika E; Yamamura Soichiro; Malik Sohail; Spiegelman Bruce M; Roeder Robert G (Nov 2003). "Coordination of p300-mediated chromatin remodeling and TRAP/mediator function through coactivator PGC-1alpha". Mol. Cell. United States. 12 (5): 1137–49. doi:10.1016/S1097-2765(03)00391-5. ISSN 1097-2765. PMID 14636573. 
  7. ^ Kang, Yun Kyoung; Guermah Mohamed; Yuan Chao-Xing; Roeder Robert G (Mar 2002). "The TRAP/Mediator coactivator complex interacts directly with estrogen receptors alpha and beta through the TRAP220 subunit and directly enhances estrogen receptor function in vitro". Proc. Natl. Acad. Sci. U.S.A. United States. 99 (5): 2642–7. doi:10.1073/pnas.261715899. ISSN 0027-8424. PMC 122401Freely accessible. PMID 11867769. 
  8. ^ Lau, Joe F; Nusinzon Inna; Burakov Darya; Freedman Leonard P; Horvath Curt M (Jan 2003). "Role of metazoan mediator proteins in interferon-responsive transcription". Mol. Cell. Biol. United States. 23 (2): 620–8. doi:10.1128/MCB.23.2.620-628.2003. ISSN 0270-7306. PMC 151539Freely accessible. PMID 12509459. 
  9. ^ Wang, G; Cantin G T; Stevens J L; Berk A J (Jul 2001). "Characterization of mediator complexes from HeLa cell nuclear extract". Mol. Cell. Biol. United States. 21 (14): 4604–13. doi:10.1128/MCB.21.14.4604-4613.2001. ISSN 0270-7306. PMC 87123Freely accessible. PMID 11416138. 
  10. ^ Ito, M; Yuan C X; Malik S; Gu W; Fondell J D; Yamamura S; Fu Z Y; Zhang X; Qin J; Roeder R G (Mar 1999). "Identity between TRAP and SMCC complexes indicates novel pathways for the function of nuclear receptors and diverse mammalian activators". Mol. Cell. UNITED STATES. 3 (3): 361–70. doi:10.1016/S1097-2765(00)80463-3. ISSN 1097-2765. PMID 10198638. 
  11. ^ Hittelman, A B; Burakov D; Iñiguez-Lluhí J A; Freedman L P; Garabedian M J (Oct 1999). "Differential regulation of glucocorticoid receptor transcriptional activation via AF-1-associated proteins". EMBO J. ENGLAND. 18 (19): 5380–8. doi:10.1093/emboj/18.19.5380. ISSN 0261-4189. PMC 1171607Freely accessible. PMID 10508170. 
  12. ^ Maeda, Yutaka; Rachez Christophe; Hawel Leo; Byus Craig V; Freedman Leonard P; Sladek Frances M (Jul 2002). "Polyamines modulate the interaction between nuclear receptors and vitamin D receptor-interacting protein 205". Mol. Endocrinol. United States. 16 (7): 1502–10. doi:10.1210/mend.16.7.0883. ISSN 0888-8809. PMID 12089346. 
  13. ^ Malik, Sohail; Wallberg Annika E; Kang Yun Kyoung; Roeder Robert G (Aug 2002). "TRAP/SMCC/mediator-dependent transcriptional activation from DNA and chromatin templates by orphan nuclear receptor hepatocyte nuclear factor 4". Mol. Cell. Biol. United States. 22 (15): 5626–37. doi:10.1128/MCB.22.15.5626-5637.2002. ISSN 0270-7306. PMC 133960Freely accessible. PMID 12101254. 

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