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Reviewed, UniProtKB/Swiss-Prot Q96RN5 (MED15_HUMAN)

Last modified July 7, 2009. Version 78. Feed History...

Clusters with 100%, 90%, 50% identity | Documents (5) | Third-party data | Customize display text xml rdf/xml gff fasta
Names and origin · Protein attributes · General annotation (Comments) · Ontologies · Binary interactions · Alternative products · Sequence annotation (Features) · Sequences · References · Cross-references · Entry information · Relevant documents

Names and origin

Protein namesRecommended name:
    Mediator of RNA polymerase II transcription subunit 15
Alternative name(s):
    Mediator complex subunit 15
    Positive cofactor 2 glutamine/Q-rich-associated protein
      Short name=PC2 glutamine/Q-rich-associated protein
    TPA-inducible gene 1 protein
      Short name=TIG-1
    Activator-recruited cofactor 105 kDa component
      Short name=ARC105
    CTG repeat protein 7a
    Trinucleotide repeat-containing gene 7 protein
Gene names
Name: MED15
Synonyms: ARC105, CTG7A, PCQAP, TIG1, TNRC7
OrganismHomo sapiens (Human) [Complete proteome]
Taxonomic identifier9606 [NCBI]
Taxonomic lineageEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresPrimatesHaplorrhiniCatarrhiniHominidaeHomo

Protein attributes

Sequence length788 AA.
Sequence statusComplete.
Sequence processingThe displayed sequence is not processed.
Protein existenceEvidence at protein level.

General annotation (Comments)

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. Required for cholesterol-dependent gene regulation. Positively regulates the Nodal signaling pathway. Ref.8 Ref.11 Ref.12

Subunit structure

Component of the Mediator complex, which is composed of MED1, MED4, MED6, MED7, MED8, MED9, MED10, MED11, MED12, MED13, MED13L, MED14, MED15, MED16, MED17, MED18, MED19, MED20, MED21, MED22, MED23, MED24, MED25, MED26, MED27, MED29, MED30, MED31, CCNC, CDK8 and CDC2L6/CDK11. The MED12, MED13, CCNC and CDK8 subunits form a distinct module termed the CDK8 module. Mediator containing the CDK8 module is less active than Mediator lacking this module in supporting transcriptional activation. Individual preparations of the Mediator complex lacking one or more distinct subunits have been variously termed ARC, CRSP, DRIP, PC2, SMCC and TRAP. Interacts with SMAD2, SMAD3, SREBF1 and SREBF2. Ref.8 Ref.12

Subcellular location

Cytoplasm. Nucleus. Ref.1

Tissue specificity

Expressed in all tissues examined, including heart, brain, lung, spleen, thymus, pancreas, blood leukocyte and placenta. However, the level of expression varied, with highest expression in the placenta and peripheral blood and lowest in the pancreas and kidney. Ref.1

Induction

By 12-O-tetradecanoylphorbol-13-acetate (TPA). Ref.1

Polymorphism

The poly-Gln region from amino acids 235-262 of PCQAP is polymorphic. There are from 15 to 18 repeats in the Italian population.

Sequence similarities

Belongs to the Mediator complex subunit 15 family.

Sequence caution

The sequence AAC12944.1 differs from that shown. Reason: Frameshift at positions 13, 600 and 749.

The sequence BAB85034.1 differs from that shown. Reason: Miscellaneous discrepancy. Several sequencing errors.

Binary interactions

With

Entry

#Exp.

IntAct

Notes

CREB1P162201EBI-394506,EBI-711855
MYBP102421EBI-394506,EBI-298355
sbp-1Q9XX001EBI-394506,EBI-321652From a different organism.
SREBF1P36956-14EBI-394506,EBI-948328

Alternative products

This entry describes 3 isoforms produced by alternative splicing. [Align] [Select]
Isoform 1 (identifier: Q96RN5-1)

This isoform has been chosen as the 'canonical' sequence. All positional information in this entry refers to it. This is also the sequence that appears in the downloadable versions of the entry.
Isoform 2 (identifier: Q96RN5-2)

The sequence of this isoform differs from the canonical sequence as follows:
     385-424: Missing.
Isoform 3 (identifier: Q96RN5-3)

The sequence of this isoform differs from the canonical sequence as follows:
     80-151: DPMNALQSLTGGPAAGAAGIGMPPRGPGQSLGGMGSLGAMGQPMSLSGQPPPGTSGMAPHSMAVVSTATPQT → A
     385-424: Missing.
Note: No experimental confirmation available.

Sequence annotation (Features)

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifier

Molecule processing

Chain1 – 788788Mediator of RNA polymerase II transcription subunit 15
PRO_0000058264

Regions

Region9 – 7365Interaction with SREBF1
Motif547 – 56418Nuclear localization signal Potential
Compositional bias161 – 17414Poly-Gln
Compositional bias178 – 19316Poly-Gln
Compositional bias205 – 21814Poly-Gln
Compositional bias226 – 23914Poly-Gln
Compositional bias243 – 26220Poly-Gln
Compositional bias266 – 515250Pro-rich
Compositional bias360 – 3678Poly-Gln
Compositional bias449 – 4568Poly-Pro
Compositional bias602 – 61110Poly-Pro

Amino acid modifications

Modified residue6031Phosphothreonine Ref.13

Natural variations

Alternative sequence80 – 15172DPMNA…ATPQT → A in isoform 3.
VSP_013024
Alternative sequence385 – 42440Missing in isoform 2 and isoform 3.
VSP_003922
Natural variant261 – 2622Missing
VAR_013136

Experimental info

Mutagenesis421E → A: Abrogates interaction with SREBF1. Ref.12
Mutagenesis581L → D: Abrogates interaction with SREBF1. Ref.12
Mutagenesis601A → D: Abrogates interaction with SREBF1. Ref.12
Sequence conflict121S → R in AAC12944. Ref.1
Sequence conflict1161L → F in AAC12944. Ref.1
Sequence conflict1541Q → H in BAC03446. Ref.3
Sequence conflict1611Q → R in BAB85034. Ref.3
Sequence conflict185 – 1862QQ → EL in AAB91443. Ref.6
Sequence conflict186 – 1872Missing in CAG30423. Ref.4
Sequence conflict2181Missing in CAG30423. Ref.4
Sequence conflict232 – 28756Missing in BAB85034. Ref.3
Sequence conflict2651Q → E in AAC12944. Ref.1
Sequence conflict2651Q → E in AAB91443. Ref.6
Sequence conflict572 – 5732IL → GI in AAB91443. Ref.6
Sequence conflict6851L → V in BAB85034. Ref.3

Secondary structure

....... 788
Helix Strand Turn

Details...

Sequences

Sequence LengthMass (Da)Tools
Isoform 1 [UniParc].

Last modified January 10, 2003. Version 2.
Checksum: BB6AC6C63ED2F97E

FASTA78886,753
        10         20         30         40         50         60 
MDVSGQETDW RSTAFRQKLV SQIEDAMRKA GVAHSKSSKD MESHVFLKAK TRDEYLSLVA 

        70         80         90        100        110        120 
RLIIHFRDIH NKKSQASVSD PMNALQSLTG GPAAGAAGIG MPPRGPGQSL GGMGSLGAMG 

       130        140        150        160        170        180 
QPMSLSGQPP PGTSGMAPHS MAVVSTATPQ TQLQLQQVAL QQQQQQQQFQ QQQQAALQQQ 

       190        200        210        220        230        240 
QQQQQQQQFQ AQQSAMQQQF QAVVQQQQQL QQQQQQQQHL IKLHHQNQQQ IQQQQQQLQR 

       250        260        270        280        290        300 
IAQLQLQQQQ QQQQQQQQQQ QQALQAQPPI QQPPMQQPQP PPSQALPQQL QQMHHTQHHQ 

       310        320        330        340        350        360 
PPPQPQQPPV AQNQPSQLPP QSQTQPLVSQ AQALPGQMLY TQPPLKFVRA PMVVQQPPVQ 

       370        380        390        400        410        420 
PQVQQQQTAV QTAQAAQMVA PGVQMITEAL AQGGMHIRAR FPPTTAVSAI PSSSIPLGRQ 

       430        440        450        460        470        480 
PMAQVSQSSL PMLSSPSPGQ QVQTPQSMPP PPQPSPQPGQ PSSQPNSNVS SGPAPSPSSF 

       490        500        510        520        530        540 
LPSPSPQPSQ SPVTARTPQN FSVPSPGPLN TPVNPSSVMS PAGSSQAEEQ QYLDKLKQLS 

       550        560        570        580        590        600 
KYIEPLRRMI NKIDKNEDRK KDLSKMKSLL DILTDPSKRC PLKTLQKCEI ALEKLKNDMA 

       610        620        630        640        650        660 
VPTPPPPPVP PTKQQYLCQP LLDAVLANIR SPVFNHSLYR TFVPAMTAIH GPPITAPVVC 

       670        680        690        700        710        720 
TRKRRLEDDE RQSIPSVLQG EVARLDPKFL VNLDPSHCSN NGTVHLICKL DDKDLPSVPP 

       730        740        750        760        770        780 
LELSVPADYP AQSPLWIDRQ WQYDANPFLQ SVHRCMTSRL LQLPDKHSVT ALLNTWAQSV 


HQACLSAA 

« Hide

Isoform 2.

Checksum: 436AD762713DCC63
Show »

FASTA74882,581
Isoform 3.

Checksum: C5DBE759F22901CB
Show »

FASTA67775,927

References

« Hide 'large scale' references
[1]"A novel glutamine-rich putative transcriptional adaptor protein (TIG-1), preferentially expressed in placental and bone-marrow tissues."
Abraham S., Solomon W.B.
Gene 255:389-400(2000) [PubMed: 11024300] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 2), SUBCELLULAR LOCATION, TISSUE SPECIFICITY, INDUCTION.
Tissue: Megakaryocyte and Placenta.
[2]"Isolation and characterization of a novel gene from the DiGeorge chromosomal region that encodes for a mediator subunit."
Berti L., Mittler G., Przemeck G.K.H., Stelzer G., Guenzler B., Amati F., Conti E., Dallapiccola B., Hrabe' de Angelis M., Novelli G., Meisterernst M.
Genomics 74:320-332(2001) [PubMed: 11414760] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 2), POLYMORPHISM OF POLY-GLN REGION.
Tissue: Cervix carcinoma.
[3]"Complete sequencing and characterization of 21,243 full-length human cDNAs."
Ota T., Suzuki Y., Nishikawa T., Otsuki T., Sugiyama T., Irie R., Wakamatsu A., Hayashi K., Sato H., Nagai K., Kimura K., Makita H., Sekine M., Obayashi M., Nishi T., Shibahara T., Tanaka T., Ishii S. expand/collapse author list , Yamamoto J., Saito K., Kawai Y., Isono Y., Nakamura Y., Nagahari K., Murakami K., Yasuda T., Iwayanagi T., Wagatsuma M., Shiratori A., Sudo H., Hosoiri T., Kaku Y., Kodaira H., Kondo H., Sugawara M., Takahashi M., Kanda K., Yokoi T., Furuya T., Kikkawa E., Omura Y., Abe K., Kamihara K., Katsuta N., Sato K., Tanikawa M., Yamazaki M., Ninomiya K., Ishibashi T., Yamashita H., Murakawa K., Fujimori K., Tanai H., Kimata M., Watanabe M., Hiraoka S., Chiba Y., Ishida S., Ono Y., Takiguchi S., Watanabe S., Yosida M., Hotuta T., Kusano J., Kanehori K., Takahashi-Fujii A., Hara H., Tanase T.-O., Nomura Y., Togiya S., Komai F., Hara R., Takeuchi K., Arita M., Imose N., Musashino K., Yuuki H., Oshima A., Sasaki N., Aotsuka S., Yoshikawa Y., Matsunawa H., Ichihara T., Shiohata N., Sano S., Moriya S., Momiyama H., Satoh N., Takami S., Terashima Y., Suzuki O., Nakagawa S., Senoh A., Mizoguchi H., Goto Y., Shimizu F., Wakebe H., Hishigaki H., Watanabe T., Sugiyama A., Takemoto M., Kawakami B., Yamazaki M., Watanabe K., Kumagai A., Itakura S., Fukuzumi Y., Fujimori Y., Komiyama M., Tashiro H., Tanigami A., Fujiwara T., Ono T., Yamada K., Fujii Y., Ozaki K., Hirao M., Ohmori Y., Kawabata A., Hikiji T., Kobatake N., Inagaki H., Ikema Y., Okamoto S., Okitani R., Kawakami T., Noguchi S., Itoh T., Shigeta K., Senba T., Matsumura K., Nakajima Y., Mizuno T., Morinaga M., Sasaki M., Togashi T., Oyama M., Hata H., Watanabe M., Komatsu T., Mizushima-Sugano J., Satoh T., Shirai Y., Takahashi Y., Nakagawa K., Okumura K., Nagase T., Nomura N., Kikuchi H., Masuho Y., Yamashita R., Nakai K., Yada T., Nakamura Y., Ohara O., Isogai T., Sugano S.
Nat. Genet. 36:40-45(2004) [PubMed: 14702039] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORMS 1 AND 2).
Tissue: Hepatoma and Spleen.
[4]"A genome annotation-driven approach to cloning the human ORFeome."
Collins J.E., Wright C.L., Edwards C.A., Davis M.P., Grinham J.A., Cole C.G., Goward M.E., Aguado B., Mallya M., Mokrab Y., Huckle E.J., Beare D.M., Dunham I.
Genome Biol. 5:RESEARCH84.1-RESEARCH84.11(2004) [PubMed: 15461802] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORM 3).
[5]"The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC)."
The MGC Project Team
Genome Res. 14:2121-2127(2004) [PubMed: 15489334] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORM 2), NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] OF 405-788 (ISOFORM 1).
Tissue: Eye and Kidney.
[6]"cDNAs with long CAG trinucleotide repeats from human brain."
Margolis R.L., Abraham M.R., Gatchell S.B., Li S.-H., Kidwai A.S., Breschel T.S., Stine O.C., Callahan C., McInnis M.G., Ross C.A.
Hum. Genet. 100:114-122(1997) [PubMed: 9225980] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [MRNA] OF 185-573 (ISOFORM 2).
Tissue: Brain cortex.
[7]"Composite co-activator ARC mediates chromatin-directed transcriptional activation."
Naeaer A.M., Beaurang P.A., Zhou S., Abraham S., Solomon W.B., Tjian R.
Nature 398:828-832(1999) [PubMed: 10235267] [Abstract]
Cited for: IDENTIFICATION IN ARC COMPLEX, PROTEIN SEQUENCE OF 39-48 AND 525-536.
[8]"A component of the ARC/Mediator complex required for TGF beta/Nodal signalling."
Kato Y., Habas R., Katsuyama Y., Naeaer A.M., He X.
Nature 418:641-646(2002) [PubMed: 12167862] [Abstract]
Cited for: FUNCTION, INTERACTION WITH SMAD1; SMAD2 AND SMAD3.
[9]"A set of consensus mammalian mediator subunits identified by multidimensional protein identification technology."
Sato S., Tomomori-Sato C., Parmely T.J., Florens L., Zybailov B., Swanson S.K., Banks C.A.S., Jin J., Cai Y., Washburn M.P., Conaway J.W., Conaway R.C.
Mol. Cell 14:685-691(2004) [PubMed: 15175163] [Abstract]
Cited for: IDENTIFICATION BY MASS SPECTROMETRY, IDENTIFICATION IN THE MEDIATOR COMPLEX.
[10]"MED1/TRAP220 exists predominantly in a TRAP/Mediator subpopulation enriched in RNA polymerase II and is required for ER-mediated transcription."
Zhang X., Krutchinsky A., Fukuda A., Chen W., Yamamura S., Chait B.T., Roeder R.G.
Mol. Cell 19:89-100(2005) [PubMed: 15989967] [Abstract]
Cited for: IDENTIFICATION BY MASS SPECTROMETRY, IDENTIFICATION IN THE MEDIATOR COMPLEX, ASSOCIATION OF THE MEDIATOR COMPLEX WITH RNA POLYMERASE II.
[11]"Genome-wide location of the coactivator mediator: binding without activation and transient Cdk8 interaction on DNA."
Andrau J.-C., van de Pasch L., Lijnzaad P., Bijma T., Koerkamp M.G., van de Peppel J., Werner M., Holstege F.C.P.
Mol. Cell 22:179-192(2006) [PubMed: 16630888] [Abstract]
Cited for: FUNCTION.
[12]"An ARC/Mediator subunit required for SREBP control of cholesterol and lipid homeostasis."
Yang F., Vought B.W., Satterlee J.S., Walker A.K., Jim Sun Z.-Y., Watts J.L., DeBeaumont R., Saito R.M., Hyberts S.G., Yang S., Macol C., Iyer L., Tjian R., van den Heuvel S., Hart A.C., Wagner G., Naeaer A.M.
Nature 442:700-704(2006) [PubMed: 16799563] [Abstract]
Cited for: FUNCTION, INTERACTION WITH SREBF1 AND SREBF2, MUTAGENESIS OF GLU-42; LEU-58 AND ALA-60.
[13]"A quantitative atlas of mitotic phosphorylation."
Dephoure N., Zhou C., Villen J., Beausoleil S.A., Bakalarski C.E., Elledge S.J., Gygi S.P.
Proc. Natl. Acad. Sci. U.S.A. 105:10762-10767(2008) [PubMed: 18669648] [Abstract]
Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT THR-603, MASS SPECTROMETRY.
+Additional computationally mapped references.

Cross-references

Sequence databases

AF056191 mRNA. Translation: AAC12944.1. Frameshift.
AF328769 mRNA. Translation: AAK58423.1.
AK074268 mRNA. Translation: BAB85034.1. Sequence problems.
AK090465 mRNA. Translation: BAC03446.1. Different initiation.
CR456537 mRNA. Translation: CAG30423.1.
BC007529 mRNA. Translation: AAH07529.1.
BC013985 mRNA. Translation: AAH13985.1.
U80745 mRNA. Translation: AAB91443.1.
IPIIPI00107693.
IPI00220307.
IPI00554734.
RefSeqNP_001003891.1.
NP_056973.2.
UniGeneHs.517421

3D structure databases

EntryMethodResolution (Å)ChainPositionsPDBsum
2GUTNMR-A5-78[»]
ModBaseSearch...

Protein-protein interaction databases

IntActQ96RN5. 18 interactions.

PTM databases

PhosphoSiteQ96RN5.

Proteomic databases

PRIDEQ96RN5.

Genome annotation databases

EnsemblENSG00000099917. Homo sapiens. [Contig view]
GeneID51586.
KEGGhsa:51586.
UCSCuc002zsp.1. human.
uc002zsq.1. human.

Organism-specific databases

GeneCardsGC22P019191.
H-InvDBHIX0016260.
HIX0030455.
HGNCHGNC:14248. MED15.
HPAHPA003179.
MIM607372. gene.
PharmGKBPA33088.
GenAtlasSearch...

Phylogenomic databases

HOVERGENQ96RN5.
OMAQ96RN5. PGQMLYT.

Enzyme and pathway databases

Pathway_Interaction_DBsmad2_3nuclearpathway. Regulation of nuclear SMAD2/3 signaling.
ReactomeREACT_71. Gene Expression.

Gene expression databases

ArrayExpressQ96RN5.
BgeeQ96RN5.
CleanExHS_MED15.
GermOnlineENSG00000099917. Homo sapiens.

Family and domain databases

InterProIPR019087. Mediator_Med15_met.
[Graphical view]
PfamPF09606. ARC105_Med_act. 1 hit.
[Graphical view]
ProtoNetSearch...

Other Resources

NextBio55423.
SOURCESearch...

Entry information

Entry nameMED15_HUMAN
AccessionPrimary (citable) accession number: Q96RN5
Secondary accession number(s): O15413 expand/collapse secondary AC list , Q6IC31, Q8NF16, Q96CT0, Q96IH7, Q9P1T3
Entry history
Integrated into UniProtKB/Swiss-Prot: April 16, 2002
Last sequence update: January 10, 2003
Last modified: July 7, 2009
This is version 78 of the entry and version 2 of the sequence. [Complete history]
Entry statusReviewed (UniProtKB/Swiss-Prot)
Annotation projectHPI (Human Proteome Initiative)

Relevant documents

Human chromosome 22

Human chromosome 22: entries, gene names and cross-references to MIM

Human entries with polymorphisms or disease mutations

List of human entries with polymorphisms or disease mutations

MIM cross-references

Online Mendelian Inheritance in Man (MIM) cross-references in UniProtKB/Swiss-Prot

PDB cross-references

Index of Protein Data Bank (PDB) cross-references

SIMILARITY comments

Index of protein domains and families

Names and origin · Protein attributes · General annotation (Comments) · Ontologies · Binary interactions · Alternative products · Sequence annotation (Features) · Sequences · References · Cross-references · Entry information · Relevant documents