Asymmetric Unit(hide GO term definitions)
Chain A,C,E,G ( MED20_YEAST | P34162)
| molecular function |
|---|
| | GO:0001128 | | RNA polymerase II transcription coactivator activity involved in preinitiation complex assembly | | Interacting selectively and non-covalently with an RNA polymerase II (RNAP II) regulatory transcription factor and also with the RNAP II basal transcription machinery in order to increase the frequency, rate or stability of the aggregation, arrangement and bonding together of proteins on RNA polymerase II promoter DNA to form the transcriptional preinitiation complex (PIC). Cofactors generally do not bind DNA, but rather mediate protein-protein interactions between activating transcription factors and the basal RNAP II transcription machinery. |
| | GO:0001104 | | RNA polymerase II transcription cofactor activity | | Interacting selectively and non-covalently with an RNA polymerase II (RNAP II) regulatory transcription factor and also with the RNAP II basal transcription machinery in order to modulate transcription. Cofactors generally do not bind DNA, but rather mediate protein-protein interactions between regulatory transcription factors and the basal RNAP II transcription machinery. |
| | GO:0001129 | | RNA polymerase II transcription factor activity, TBP-class protein binding, involved in preinitiation complex assembly | | Interacting selectively and non-covalently with a member of the class of TATA-binding proteins (TBP), including any of the TBP-related factors (TRFs), to facilitate the aggregation, arrangement and bonding together of proteins on RNA polymerase II promoter DNA to form the transcriptional preinitiation complex (PIC), the formation of which is a prerequisite for transcription by RNA polymerase. |
| | GO:0005515 | | protein binding | | Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules). |
| | GO:0019904 | | protein domain specific binding | | Interacting selectively and non-covalently with a specific domain of a protein. |
| | GO:0001135 | | transcription factor activity, RNA polymerase II transcription factor recruiting | | The function of binding to an RNA polymerase II (RNAP II) transcription factor and recruiting it to the transcription machinery complex in order to modulate transcription by RNAP II. |
| | GO:0000991 | | transcription factor activity, core RNA polymerase II binding | | Interacting selectively and non-covalently with an RNA polymerase II (Pol II) complex, typically composed of twelve subunits, in order to modulate transcription. A protein binding transcription factor may or may not also interact with the template nucleic acid (either DNA or RNA) as well. |
| biological process |
|---|
| | GO:0051123 | | RNA polymerase II transcriptional preinitiation complex assembly | | The aggregation, arrangement and bonding together of proteins on an RNA polymerase II promoter DNA to form the transcriptional preinitiation complex (PIC), the formation of which is a prerequisite for transcription by RNA polymerase. |
| | GO:0010689 | | negative regulation of ribosomal protein gene transcription from RNA polymerase II promoter in response to chemical stimulus | | Any process that decreases the frequency, rate or extent of the synthesis of RNA from ribosomal protein genes by RNA polymerase II, originating at an RNA polymerase II promoter, as a result of a chemical stimulus. |
| | GO:0010691 | | negative regulation of ribosomal protein gene transcription from RNA polymerase II promoter in response to nutrient levels | | Any process that decreases the frequency, rate or extent of the synthesis of RNA from ribosomal protein genes by RNA polymerase II, originating at an RNA polymerase II promoter, as a result of a stimulus reflecting the presence, absence, or concentration of nutrients. |
| | GO:0045944 | | positive regulation of transcription from RNA polymerase II promoter | | Any process that activates or increases the frequency, rate or extent of transcription from an RNA polymerase II promoter. |
| | GO:0006357 | | regulation of transcription from RNA polymerase II promoter | | Any process that modulates the frequency, rate or extent of transcription from an RNA polymerase II promoter. |
| | GO:0006355 | | regulation of transcription, DNA-templated | | Any process that modulates the frequency, rate or extent of cellular DNA-templated transcription. |
| | GO:0006351 | | transcription, DNA-templated | | The cellular synthesis of RNA on a template of DNA. |
| cellular component |
|---|
| | GO:0070847 | | core mediator complex | | A protein complex that interacts with the carboxy-terminal domain of the largest subunit of RNA polymerase II and plays an active role in transducing the signal from a transcription factor to the transcriptional machinery. The core mediator complex has a stimulatory effect on basal transcription, and contains most of the same subdomains as the larger form of mediator complex -- a head domain comprising proteins known in Saccharomyces as Srb2, -4, and -5, Med6, -8, and -11, and Rox3 proteins; a middle domain comprising Med1, -4, and -7, Nut1 and -2, Cse2, Rgr1, Soh1, and Srb7 proteins; and a tail consisting of Gal11p, Med2p, Pgd1p, and Sin4p -- but lacks the regulatory subcomplex comprising Ssn2, -3, and -8, and Srb8 proteins. Metazoan core mediator complexes have similar modular structures and include homologs of yeast Srb and Med proteins. |
| | GO:0016592 | | mediator complex | | A protein complex that interacts with the carboxy-terminal domain of the largest subunit of RNA polymerase II and plays an active role in transducing the signal from a transcription factor to the transcriptional machinery. The mediator complex is required for activation of transcription of most protein-coding genes, but can also act as a transcriptional corepressor. The Saccharomyces complex contains several identifiable subcomplexes: a head domain comprising Srb2, -4, and -5, Med6, -8, and -11, and Rox3 proteins; a middle domain comprising Med1, -4, and -7, Nut1 and -2, Cse2, Rgr1, Soh1, and Srb7 proteins; a tail consisting of Gal11p, Med2p, Pgd1p, and Sin4p; and a regulatory subcomplex comprising Ssn2, -3, and -8, and Srb8 proteins. Metazoan mediator complexes have similar modular structures and include homologs of yeast Srb and Med proteins. |
| | GO:0005634 | | nucleus | | A membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated. In most cells, the nucleus contains all of the cell's chromosomes except the organellar chromosomes, and is the site of RNA synthesis and processing. In some species, or in specialized cell types, RNA metabolism or DNA replication may be absent. |
Chain B,D,F,H ( MED18_YEAST | P32585)
| molecular function |
|---|
| | GO:0000979 | | RNA polymerase II core promoter sequence-specific DNA binding | | Interacting selectively and non-covalently with the regulatory region composed of the transcription start site and binding sites for transcription factors of the RNA polymerase II basal transcription machinery. |
| | GO:0001104 | | RNA polymerase II transcription cofactor activity | | Interacting selectively and non-covalently with an RNA polymerase II (RNAP II) regulatory transcription factor and also with the RNAP II basal transcription machinery in order to modulate transcription. Cofactors generally do not bind DNA, but rather mediate protein-protein interactions between regulatory transcription factors and the basal RNAP II transcription machinery. |
| | GO:0001129 | | RNA polymerase II transcription factor activity, TBP-class protein binding, involved in preinitiation complex assembly | | Interacting selectively and non-covalently with a member of the class of TATA-binding proteins (TBP), including any of the TBP-related factors (TRFs), to facilitate the aggregation, arrangement and bonding together of proteins on RNA polymerase II promoter DNA to form the transcriptional preinitiation complex (PIC), the formation of which is a prerequisite for transcription by RNA polymerase. |
| | GO:0005515 | | protein binding | | Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules). |
| | GO:0001135 | | transcription factor activity, RNA polymerase II transcription factor recruiting | | The function of binding to an RNA polymerase II (RNAP II) transcription factor and recruiting it to the transcription machinery complex in order to modulate transcription by RNAP II. |
| | GO:0000991 | | transcription factor activity, core RNA polymerase II binding | | Interacting selectively and non-covalently with an RNA polymerase II (Pol II) complex, typically composed of twelve subunits, in order to modulate transcription. A protein binding transcription factor may or may not also interact with the template nucleic acid (either DNA or RNA) as well. |
| biological process |
|---|
| | GO:0051123 | | RNA polymerase II transcriptional preinitiation complex assembly | | The aggregation, arrangement and bonding together of proteins on an RNA polymerase II promoter DNA to form the transcriptional preinitiation complex (PIC), the formation of which is a prerequisite for transcription by RNA polymerase. |
| | GO:0045944 | | positive regulation of transcription from RNA polymerase II promoter | | Any process that activates or increases the frequency, rate or extent of transcription from an RNA polymerase II promoter. |
| | GO:0006357 | | regulation of transcription from RNA polymerase II promoter | | Any process that modulates the frequency, rate or extent of transcription from an RNA polymerase II promoter. |
| | GO:0006355 | | regulation of transcription, DNA-templated | | Any process that modulates the frequency, rate or extent of cellular DNA-templated transcription. |
| | GO:0006369 | | termination of RNA polymerase II transcription | | The process in which the synthesis of an RNA molecule by RNA polymerase II using a DNA template is completed. |
| | GO:0006351 | | transcription, DNA-templated | | The cellular synthesis of RNA on a template of DNA. |
| | GO:0001113 | | transcriptional open complex formation at RNA polymerase II promoter | | Any process involved in the melting of the DNA hybrid of the core promoter region within the transcriptional closed complex of an RNA polymerase II preinitiation complex (PIC) to produce an open complex where the DNA duplex around the transcription initiation site is unwound to form the transcription bubble. |
| cellular component |
|---|
| | GO:0070847 | | core mediator complex | | A protein complex that interacts with the carboxy-terminal domain of the largest subunit of RNA polymerase II and plays an active role in transducing the signal from a transcription factor to the transcriptional machinery. The core mediator complex has a stimulatory effect on basal transcription, and contains most of the same subdomains as the larger form of mediator complex -- a head domain comprising proteins known in Saccharomyces as Srb2, -4, and -5, Med6, -8, and -11, and Rox3 proteins; a middle domain comprising Med1, -4, and -7, Nut1 and -2, Cse2, Rgr1, Soh1, and Srb7 proteins; and a tail consisting of Gal11p, Med2p, Pgd1p, and Sin4p -- but lacks the regulatory subcomplex comprising Ssn2, -3, and -8, and Srb8 proteins. Metazoan core mediator complexes have similar modular structures and include homologs of yeast Srb and Med proteins. |
| | GO:0016592 | | mediator complex | | A protein complex that interacts with the carboxy-terminal domain of the largest subunit of RNA polymerase II and plays an active role in transducing the signal from a transcription factor to the transcriptional machinery. The mediator complex is required for activation of transcription of most protein-coding genes, but can also act as a transcriptional corepressor. The Saccharomyces complex contains several identifiable subcomplexes: a head domain comprising Srb2, -4, and -5, Med6, -8, and -11, and Rox3 proteins; a middle domain comprising Med1, -4, and -7, Nut1 and -2, Cse2, Rgr1, Soh1, and Srb7 proteins; a tail consisting of Gal11p, Med2p, Pgd1p, and Sin4p; and a regulatory subcomplex comprising Ssn2, -3, and -8, and Srb8 proteins. Metazoan mediator complexes have similar modular structures and include homologs of yeast Srb and Med proteins. |
| | GO:0005634 | | nucleus | | A membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated. In most cells, the nucleus contains all of the cell's chromosomes except the organellar chromosomes, and is the site of RNA synthesis and processing. In some species, or in specialized cell types, RNA metabolism or DNA replication may be absent. |
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