| 1350145 | MED12 | mediator complex subunit 12 | The initiation of transcription is controlled in part by a large protein assembly known as the preinitiation complex. A component of this preinitiation complex is a 1.2 MDa protein aggregate called Mediator. This Mediator component binds with a CDK8 subcomplex which contains the protein encoded by t his gene, mediator complex subunit 12 (MED12), along with MED13, CDK8 kinase, and cyclin C. The CDK8 subcomplex modulates Mediator-polymerase II interactions and thereby regulates transcription initiation and reinitation rates. The MED12 protein is essential for activating CDK8 kinase. Defects in this gene cause X-linked Opitz-Kaveggia syndrome, also known as FG syndrome, and Lujan-Fryns syndrome. [provided by RefSeq, Aug 2009] | X | 71118596 | 71142450 | Human | 667 | symbol , COSMIC , description , Human Proteome Map , old_gene_symbol | gene, protein-coding, REVIEWED [RefSeq] |
| 1557537 | Med12 | mediator complex subunit 12 | Enables RNA polymerase II cis-regulatory region sequence-specific DNA binding activity; chromatin binding activity; and transcription coactivator activity. Acts upstream of or within several processes, including chordate embryonic development; embryonic brain development; and glial cell development. Part of mediator complex. Is expressed in brain; tibialis anterior; and tongue. Human ortholog(s) of this gene implicated in FG syndrome; leiomyosarcoma; major depressive disorder; phobic disorder; and syndromic X-linked intellectual disorder Lujan-Fryns-type. Orthologous to human MED12 (mediator complex subunit 12). [provided by Alliance of Genome Resources, Jul 2025] | X | 100317697 | 100342540 | Mouse | 189 | symbol , PhenoGen , description | gene, protein-coding, VALIDATED [RefSeq] |
| 1585896 | Med12 | mediator complex subunit 12 | ENCODES a protein that exhibits ubiquitin protein ligase activity; chromatin binding (ortholog); nuclear thyroid hormone receptor binding (ortholog); INVOLVED IN protein ubiquitination; axis elongation involved in somitogenesis (ortholog); embryonic brain development (ortholog); PARTICIPATES IN RNA polymerase II transcription pathway; ASSOCIATED WITH adrenocortical carcinoma (ortholog); Agenesis of Corpus Callosum (ortholog); angiosarcoma (ortholog); FOUND IN ubiquitin ligase complex; mediator complex (ortholog); nucleus (ortholog); INTERACTS WITH 6-propyl-2-thiouracil; amitrole; amphetamine | X | 70444615 | 70467780 | Rat | 156 | symbol , PhenoGen | gene, protein-coding, VALIDATED [RefSeq] |
| 8934488 | Med12 | mediator complex subunit 12 | ENCODES a protein that exhibits chromatin binding (ortholog); nuclear thyroid hormone receptor binding (ortholog); RNA polymerase II cis-regulatory region sequence-specific DNA binding (ortholog); INVOLVED IN axis elongation involved in somitogenesis (ortholog); embryonic brain development (ortholog ); embryonic neurocranium morphogenesis (ortholog); PARTICIPATES IN RNA polymerase II transcription pathway; ASSOCIATED WITH adrenocortical carcinoma (ortholog); Agenesis of Corpus Callosum (ortholog); angiosarcoma (ortholog); FOUND IN CKM complex (ortholog); mediator complex (ortholog); nucleus (ortholog) | NW_004955475 | 10687168 | 10710286 | Chinchilla | 78 | symbol | gene, protein-coding, MODEL [RefSeq] |
| 11770947 | MED12 | mediator complex subunit 12 | ENCODES a protein that exhibits ubiquitin protein ligase activity (ortholog); INVOLVED IN axis elongation involved in somitogenesis (ortholog); embryonic brain development (ortholog); embryonic neurocranium morphogenesis (ortholog); PARTICIPATES IN RNA polymerase II transcription pathway; ASSOCIATED WITH adrenocortical carcinoma (ortholog); Agenesis of Corpus Callosum (ortholog); angiosarcoma (ortholog); FOUND IN ubiquitin ligase complex (ortholog) | X | 60386820 | 60410730 | Bonobo | 84 | symbol | gene, protein-coding, MODEL [RefSeq] |
| 12169673 | MED12 | mediator complex subunit 12 | ENCODES a protein that exhibits chromatin binding (ortholog); nuclear thyroid hormone receptor binding (ortholog); RNA polymerase II cis-regulatory region sequence-specific DNA binding (ortholog); INVOLVED IN axis elongation involved in somitogenesis (ortholog); embryonic brain development (ortholog ); embryonic neurocranium morphogenesis (ortholog); PARTICIPATES IN RNA polymerase II transcription pathway; ASSOCIATED WITH adrenocortical carcinoma (ortholog); Agenesis of Corpus Callosum (ortholog); angiosarcoma (ortholog); FOUND IN CKM complex (ortholog); ubiquitin ligase complex (ortholog) | X | 55487629 | 55508941 | Dog | 80 | symbol | gene, protein-coding, MODEL [RefSeq] |
| 12732007 | Med12 | mediator complex subunit 12 | ENCODES a protein that exhibits ubiquitin protein ligase activity (ortholog); INVOLVED IN axis elongation involved in somitogenesis (ortholog); embryonic brain development (ortholog); embryonic neurocranium morphogenesis (ortholog); PARTICIPATES IN RNA polymerase II transcription pathway; ASSOCIATED WITH adrenocortical carcinoma (ortholog); Agenesis of Corpus Callosum (ortholog); angiosarcoma (ortholog); FOUND IN ubiquitin ligase complex (ortholog) | NW_004936762 | 460342 | 483264 | Squirrel | 84 | symbol | gene, protein-coding, MODEL [RefSeq] |
| 18933796 | Med12 | mediator complex subunit 12 | ENCODES a protein that exhibits chromatin binding (ortholog); nuclear thyroid hormone receptor binding (ortholog); RNA polymerase II cis-regulatory region sequence-specific DNA binding (ortholog); INVOLVED IN axis elongation involved in somitogenesis (ortholog); embryonic brain development (ortholog ); embryonic neurocranium morphogenesis (ortholog); PARTICIPATES IN RNA polymerase II transcription pathway; ASSOCIATED WITH adrenocortical carcinoma (ortholog); Agenesis of Corpus Callosum (ortholog); angiosarcoma (ortholog); FOUND IN CKM complex (ortholog); ubiquitin ligase complex (ortholog) | | | | Naked Mole-Rat | 81 | symbol | gene, protein-coding, MODEL [RefSeq] |
| 625883250 | Med12 | mediator complex subunit 12 | ENCODES a protein that exhibits chromatin binding (ortholog); nuclear thyroid hormone receptor binding (ortholog); RNA polymerase II cis-regulatory region sequence-specific DNA binding (ortholog); INVOLVED IN axis elongation involved in somitogenesis (ortholog); embryonic brain development (ortholog ); embryonic neurocranium morphogenesis (ortholog); PARTICIPATES IN RNA polymerase II transcription pathway; ASSOCIATED WITH adrenocortical carcinoma (ortholog); Agenesis of Corpus Callosum (ortholog); angiosarcoma (ortholog); FOUND IN CKM complex (ortholog); mediator complex (ortholog); nucleus (ortholog) | | | | Black Rat | 73 | symbol | gene, protein-coding, MODEL [RefSeq] |
| 13909430 | MED12 | mediator complex subunit 12 | ENCODES a protein that exhibits ubiquitin protein ligase activity (ortholog); INVOLVED IN axis elongation involved in somitogenesis (ortholog); embryonic brain development (ortholog); embryonic neurocranium morphogenesis (ortholog); PARTICIPATES IN RNA polymerase II transcription pathway; ASSOCIATED WITH adrenocortical carcinoma (ortholog); Agenesis of Corpus Callosum (ortholog); angiosarcoma (ortholog); FOUND IN ubiquitin ligase complex (ortholog) | | | | Pig | 84 | symbol | gene, protein-coding, MODEL [RefSeq] |
| 18428179 | MED12 | mediator complex subunit 12 | ENCODES a protein that exhibits ubiquitin protein ligase activity (ortholog); INVOLVED IN axis elongation involved in somitogenesis (ortholog); embryonic brain development (ortholog); embryonic neurocranium morphogenesis (ortholog); PARTICIPATES IN RNA polymerase II transcription pathway; ASSOCIATED WITH adrenocortical carcinoma (ortholog); Agenesis of Corpus Callosum (ortholog); angiosarcoma (ortholog); FOUND IN ubiquitin ligase complex (ortholog) | | | | Green Monkey | 84 | symbol | gene, protein-coding, MODEL [RefSeq] |
| 286426287 | med12 | | | | | | Tropical Clawed Frog | | symbol | gene, null |
| 284014867 | med12.L | | | | | | African Clawed Frog | | symbol | gene, null |
| 16552801 | AC004866.2 | pseudogene similar to part of mediator complex subunit 12 MED12 | | | | | Human | | name | gene, unprocessed_pseudogene |
| 16552615 | AC004866.1 | pseudogene similar to part of mediator complex subunit 12 MED12 | | | | | Human | | name | gene, processed_pseudogene |
| 1312160 | Med12l | mediator complex subunit 12-like | Predicted to enable transcription coactivator activity. Predicted to be involved in positive regulation of transcription by RNA polymerase II. Predicted to be part of mediator complex. Orthologous to human MED12L (mediator complex subunit 12L). [provided by Alli ance of Genome Resources, Apr 2025] | 3 | 58912820 | 59225867 | Mouse | 90 | symbol , PhenoGen , description | gene, protein-coding, VALIDATED [RefSeq] |
| 1352033 | MED12L | mediator complex subunit 12L | The protein encoded by this gene is part of the Mediator complex, which is involved in transcriptional coactivation of nearly all RNA polymerase II-dependent genes. The Mediator complex links gene-specific transcriptional activators with the basal transcription machinery. [provided by RefSeq, May 20 10] | 3 | 151085664 | 151436653 | Human | 136 | symbol , COSMIC , Human Proteome Map | gene, protein-coding, VALIDATED [RefSeq] |
| 1592212 | Med12l | mediator complex subunit 12L | ENCODES a protein that exhibits beta-catenin binding (inferred); transcription coregulator activity (inferred); INVOLVED IN DNA-templated transcription (inferred); regulation of transcription by RNA polymerase II (inferred); PARTICIPATES IN RNA polymerase II transcription pathway; ASSOCIATED WITH De velopmental Disease (ortholog); genetic disease (ortholog); intellectual disability (ortholog); FOUND IN mediator complex (inferred); nucleus (inferred); INTERACTS WITH 17alpha-ethynylestradiol; 2,3,7,8-tetrachlorodibenzodioxine; 4,4'-sulfonyldiphenol | 2 | 145403318 | 145726317 | Rat | 86 | symbol , PhenoGen | gene, protein-coding, MODEL [RefSeq] |
| 8886183 | Med12l | mediator complex subunit 12L | PARTICIPATES IN RNA polymerase II transcription pathway; ASSOCIATED WITH Developmental Disease (ortholog); genetic disease (ortholog); intellectual disability (ortholog) | NW_004955448 | 2224343 | 2530542 | Chinchilla | 7 | symbol | gene, protein-coding, MODEL [RefSeq] |
| 11866114 | MED12L | mediator complex subunit 12L | ENCODES a protein that exhibits beta-catenin binding (inferred); transcription coactivator activity (inferred); transcription coregulator activity (inferred); INVOLVED IN DNA-templated transcription (inferred); positive regulation of transcription by RNA polymerase II (inferred); regulation of trans cription by RNA polymerase II (inferred); PARTICIPATES IN RNA polymerase II transcription pathway; ASSOCIATED WITH Developmental Disease (ortholog); genetic disease (ortholog); intellectual disability (ortholog); FOUND IN mediator complex (inferred); nucleus (inferred) | 3 | 148115501 | 148463846 | Bonobo | 16 | symbol | gene, protein-coding, MODEL [RefSeq] |
| 12359183 | MED12L | mediator complex subunit 12L | ENCODES a protein that exhibits beta-catenin binding (inferred); transcription coregulator activity (inferred); INVOLVED IN DNA-templated transcription (inferred); regulation of transcription by RNA polymerase II (inferred); PARTICIPATES IN RNA polymerase II transcription pathway; ASSOCIATED WITH De velopmental Disease (ortholog); genetic disease (ortholog); intellectual disability (ortholog); FOUND IN mediator complex (inferred); nucleus (inferred) | 23 | 45701890 | 45987504 | Dog | 16 | symbol | gene, protein-coding, MODEL [RefSeq] |
| 12447911 | Med12l | mediator complex subunit 12L | ENCODES a protein that exhibits beta-catenin binding (inferred); transcription coactivator activity (inferred); transcription coregulator activity (inferred); INVOLVED IN DNA-templated transcription (inferred); positive regulation of transcription by RNA polymerase II (inferred); regulation of trans cription by RNA polymerase II (inferred); PARTICIPATES IN RNA polymerase II transcription pathway; ASSOCIATED WITH Developmental Disease (ortholog); genetic disease (ortholog); intellectual disability (ortholog); FOUND IN mediator complex (inferred); nucleus (inferred) | NW_004936758 | 1384616 | 1656621 | Squirrel | 16 | symbol | gene, protein-coding, MODEL [RefSeq] |
| 18922786 | Med12l | mediator complex subunit 12L | ENCODES a protein that exhibits beta-catenin binding (inferred); transcription coactivator activity (inferred); transcription coregulator activity (inferred); INVOLVED IN DNA-templated transcription (inferred); positive regulation of transcription by RNA polymerase II (inferred); regulation of trans cription by RNA polymerase II (inferred); PARTICIPATES IN RNA polymerase II transcription pathway; ASSOCIATED WITH Developmental Disease (ortholog); genetic disease (ortholog); intellectual disability (ortholog); FOUND IN mediator complex (inferred); nucleus (inferred) | | | | Naked Mole-Rat | 16 | symbol | gene, protein-coding, MODEL [RefSeq] |
| 14093376 | MED12L | mediator complex subunit 12L | ENCODES a protein that exhibits beta-catenin binding (inferred); transcription coregulator activity (inferred); INVOLVED IN DNA-templated transcription (inferred); regulation of transcription by RNA polymerase II (inferred); PARTICIPATES IN RNA polymerase II transcription pathway; ASSOCIATED WITH De velopmental Disease (ortholog); genetic disease (ortholog); intellectual disability (ortholog); FOUND IN mediator complex (inferred); nucleus (inferred) | | | | Pig | 16 | symbol | gene, protein-coding, MODEL [RefSeq] |
| 18433324 | MED12L | mediator complex subunit 12L | ENCODES a protein that exhibits beta-catenin binding (inferred); transcription coactivator activity (inferred); transcription coregulator activity (inferred); INVOLVED IN DNA-templated transcription (inferred); positive regulation of transcription by RNA polymerase II (inferred); regulation of trans cription by RNA polymerase II (inferred); PARTICIPATES IN RNA polymerase II transcription pathway; ASSOCIATED WITH Developmental Disease (ortholog); genetic disease (ortholog); intellectual disability (ortholog); FOUND IN mediator complex (inferred); nucleus (inferred) | | | | Green Monkey | 16 | symbol | gene, protein-coding, MODEL [RefSeq] |
| 626092880 | Med12l | mediator complex subunit 12L | PARTICIPATES IN RNA polymerase II transcription pathway; ASSOCIATED WITH Developmental Disease (ortholog); genetic disease (ortholog); intellectual disability (ortholog) | | | | Black Rat | 7 | symbol | gene, protein-coding, MODEL [RefSeq] |
| 1312495 | MED13 | mediator complex subunit 13 | This gene encodes 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 exp ression, possibly by interacting with RNA polymerase II and promoting the formation of a transcriptional pre-initiation complex. The product of this gene is proposed to form a sub-complex with MED12, cyclin C, and CDK8 that can negatively regulate transactivation by mediator. [provided by RefSeq, Jul 2008] | 17 | 61942605 | 62065278 | Human | 159 | description | gene, protein-coding, REVIEWED [RefSeq] |