2HZM

Structure of the Mediator head subcomplex Med18/20

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	CYTH-like phosphatases	8091513	3001426	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	CYTH-like phosphatases	8091513	3001426	SCOP2B (2022-06-29)
E	SCOP2B Superfamily	CYTH-like phosphatases	8091513	3001426	SCOP2B (2022-06-29)
G	SCOP2B Superfamily	CYTH-like phosphatases	8091513	3001426	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Med20	e2hzmA1	A: a+b complex topology	X: mRNA triphosphatase CET1-related (From Topology)	H: mRNA triphosphatase CET1-related (From Topology)	T: mRNA triphosphatase CET1-related	F: Med20	ECOD (1.6)
C	Med20	e2hzmC1	A: a+b complex topology	X: mRNA triphosphatase CET1-related (From Topology)	H: mRNA triphosphatase CET1-related (From Topology)	T: mRNA triphosphatase CET1-related	F: Med20	ECOD (1.6)
E	Med20	e2hzmE1	A: a+b complex topology	X: mRNA triphosphatase CET1-related (From Topology)	H: mRNA triphosphatase CET1-related (From Topology)	T: mRNA triphosphatase CET1-related	F: Med20	ECOD (1.6)
G	Med20	e2hzmG1	A: a+b complex topology	X: mRNA triphosphatase CET1-related (From Topology)	H: mRNA triphosphatase CET1-related (From Topology)	T: mRNA triphosphatase CET1-related	F: Med20	ECOD (1.6)
B	Med18	e2hzmB1	A: a+b complex topology	X: mRNA triphosphatase CET1-related (From Topology)	H: mRNA triphosphatase CET1-related (From Topology)	T: mRNA triphosphatase CET1-related	F: Med18	ECOD (1.6)
D	Med18	e2hzmD1	A: a+b complex topology	X: mRNA triphosphatase CET1-related (From Topology)	H: mRNA triphosphatase CET1-related (From Topology)	T: mRNA triphosphatase CET1-related	F: Med18	ECOD (1.6)
H	Med18	e2hzmH1	A: a+b complex topology	X: mRNA triphosphatase CET1-related (From Topology)	H: mRNA triphosphatase CET1-related (From Topology)	T: mRNA triphosphatase CET1-related	F: Med18	ECOD (1.6)
F	Med18	e2hzmF1	A: a+b complex topology	X: mRNA triphosphatase CET1-related (From Topology)	H: mRNA triphosphatase CET1-related (From Topology)	T: mRNA triphosphatase CET1-related	F: Med18	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.30.310.180	Alpha Beta	2-Layer Sandwich	TATA-Binding Protein		CATH (4.3.0)
A	2.20.140.20	Mainly Beta	Single Sheet	q64v53_bacfr protein fold		CATH (4.3.0)
C	3.30.310.180	Alpha Beta	2-Layer Sandwich	TATA-Binding Protein		CATH (4.3.0)
C	2.20.140.20	Mainly Beta	Single Sheet	q64v53_bacfr protein fold		CATH (4.3.0)
E	3.30.310.180	Alpha Beta	2-Layer Sandwich	TATA-Binding Protein		CATH (4.3.0)
E	2.20.140.20	Mainly Beta	Single Sheet	q64v53_bacfr protein fold		CATH (4.3.0)
G	3.30.310.180	Alpha Beta	2-Layer Sandwich	TATA-Binding Protein		CATH (4.3.0)
G	2.20.140.20	Mainly Beta	Single Sheet	q64v53_bacfr protein fold		CATH (4.3.0)
B	2.40.320.10	Mainly Beta	Beta Barrel	Hypothetical Protein Pfu-838710-001	Hypothetical Protein Pfu-838710-001	CATH (4.3.0)
D	2.40.320.10	Mainly Beta	Beta Barrel	Hypothetical Protein Pfu-838710-001	Hypothetical Protein Pfu-838710-001	CATH (4.3.0)
H	2.40.320.10	Mainly Beta	Beta Barrel	Hypothetical Protein Pfu-838710-001	Hypothetical Protein Pfu-838710-001	CATH (4.3.0)
F	2.40.320.10	Mainly Beta	Beta Barrel	Hypothetical Protein Pfu-838710-001	Hypothetical Protein Pfu-838710-001	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
B, D, F, H	PF09637	Med18 protein (Med18)	Med18 protein	Med18 is one subunit of Mediator, a head-module multiprotein complex, that stimulates basal RNA polymerase II (Pol II) transcription. Med18 consists of an eight-stranded beta-barrel with a central pore and three flanking helices. It complexes with Me ...	Med18 is one subunit of Mediator, a head-module multiprotein complex, that stimulates basal RNA polymerase II (Pol II) transcription. Med18 consists of an eight-stranded beta-barrel with a central pore and three flanking helices. It complexes with Med8 and Med20 proteins by forming a heterodimer of two-fold symmetry with Med20 and binding the C-terminal alpha-helix region of Med8 across the top of its barrel. This complex creates a multipartite TBP-binding site that can be modulated by transcriptional activators [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, C, E, G	RNA polymerase II mediator complex subunit 20	TFIID-class transcription factor complex binding transcription factor binding basal transcription machinery binding protein-containing complex binding protein binding binding basal RNA polymerase II transcription machinery binding general transcription initiation factor binding RNA polymerase II general transcription initiation factor binding protein domain specific binding transcription coactivator activity transcription regulator activity transcription coregulator activity protein-macromolecule adaptor activity TFIID-class transcription factor complex binding transcription factor binding basal transcription machinery binding protein-containing complex binding protein binding binding basal RNA polymerase II transcription machinery binding general transcription initiation factor binding RNA polymerase II general transcription initiation factor binding protein domain specific binding transcription coactivator activity transcription regulator activity transcription coregulator activity protein-macromolecule adaptor activity molecular adaptor activity	regulation of cellular process positive regulation of DNA-templated transcription positive regulation of biological process RNA metabolic process positive regulation of macromolecule biosynthetic process regulation of primary metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process DNA-templated transcription positive regulation of metabolic process regulation of DNA-templated transcription initiation regulation of RNA metabolic process transcription by RNA polymerase II positive regulation of biosynthetic process regulation of cellular process positive regulation of DNA-templated transcription positive regulation of biological process RNA metabolic process positive regulation of macromolecule biosynthetic process regulation of primary metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process DNA-templated transcription positive regulation of metabolic process regulation of DNA-templated transcription initiation regulation of RNA metabolic process transcription by RNA polymerase II positive regulation of biosynthetic process positive regulation of macromolecule metabolic process regulation of nucleobase-containing compound metabolic process transcription initiation at RNA polymerase II promoter positive regulation of cellular process regulation of RNA biosynthetic process regulation of biosynthetic process regulation of transcription by RNA polymerase II regulation of biological process positive regulation of nucleobase-containing compound metabolic process positive regulation of transcription initiation by RNA polymerase II biological regulation primary metabolic process regulation of macromolecule metabolic process nucleobase-containing compound biosynthetic process gene expression positive regulation of transcription by RNA polymerase II macromolecule biosynthetic process nucleic acid metabolic process DNA-templated transcription initiation positive regulation of DNA-templated transcription initiation positive regulation of RNA metabolic process regulation of gene expression biosynthetic process positive regulation of RNA biosynthetic process regulation of transcription initiation by RNA polymerase II metabolic process cellular process regulation of macromolecule biosynthetic process regulation of DNA-templated transcription macromolecule metabolic process regulation of metabolic process transcription preinitiation complex assembly cellular component organization cellular component biogenesis protein-DNA complex organization cellular component assembly protein-containing complex assembly cellular component organization or biogenesis protein-containing complex organization protein-DNA complex assembly RNA polymerase II preinitiation complex assembly cellular response to stimulus cellular response to nutrient levels response to nutrient levels response to stimulus transcription elongation by RNA polymerase II positive regulation of transcription elongation by RNA polymerase II positive regulation of DNA-templated transcription, elongation regulation of DNA-templated transcription elongation regulation of transcription elongation by RNA polymerase II DNA-templated transcription elongation regulation of ribosomal protein gene transcription by RNA polymerase II negative regulation of biological process negative regulation of RNA biosynthetic process negative regulation of cellular process negative regulation of nucleobase-containing compound metabolic process negative regulation of macromolecule metabolic process negative regulation of DNA-templated transcription negative regulation of transcription by RNA polymerase II negative regulation of metabolic process negative regulation of ribosomal protein gene transcription by RNA polymerase II negative regulation of biosynthetic process negative regulation of macromolecule biosynthetic process negative regulation of RNA metabolic process	RNA polymerase II transcription regulator complex membrane-bounded organelle protein-containing complex intracellular anatomical structure core mediator complex nucleus nuclear protein-containing complex transcription regulator complex intracellular membrane-bounded organelle intracellular organelle cellular anatomical structure organelle mediator complex
B, D, F, H	RNA polymerase II mediator complex subunit 18	transcription regulator activity transcription coregulator activity protein-macromolecule adaptor activity molecular adaptor activity transcription coactivator activity DNA binding sequence-specific DNA binding binding double-stranded DNA binding core promoter sequence-specific DNA binding nucleic acid binding RNA polymerase II core promoter sequence-specific DNA binding RNA polymerase II transcription regulatory region sequence-specific DNA binding sequence-specific double-stranded DNA binding transcription regulator activity transcription coregulator activity protein-macromolecule adaptor activity molecular adaptor activity transcription coactivator activity DNA binding sequence-specific DNA binding binding double-stranded DNA binding core promoter sequence-specific DNA binding nucleic acid binding RNA polymerase II core promoter sequence-specific DNA binding RNA polymerase II transcription regulatory region sequence-specific DNA binding sequence-specific double-stranded DNA binding transcription cis-regulatory region binding organic cyclic compound binding transcription regulatory region nucleic acid binding	protein-containing complex remodeling RNA metabolic process cellular component organization protein-DNA complex organization RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription nucleic acid biosynthetic process transcription open complex formation at RNA polymerase II promoter transcription by RNA polymerase II cellular component organization or biogenesis transcription initiation at RNA polymerase II promoter protein-DNA complex remodeling DNA-templated transcription open complex formation protein-containing complex remodeling RNA metabolic process cellular component organization protein-DNA complex organization RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription nucleic acid biosynthetic process transcription open complex formation at RNA polymerase II promoter transcription by RNA polymerase II cellular component organization or biogenesis transcription initiation at RNA polymerase II promoter protein-DNA complex remodeling DNA-templated transcription open complex formation protein-containing complex organization primary metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process DNA-templated transcription initiation nucleic acid metabolic process biosynthetic process cellular process metabolic process macromolecule metabolic process regulation of cellular process positive regulation of DNA-templated transcription positive regulation of biological process positive regulation of macromolecule biosynthetic process regulation of primary metabolic process positive regulation of metabolic process regulation of DNA-templated transcription initiation regulation of RNA metabolic process positive regulation of biosynthetic process positive regulation of macromolecule metabolic process regulation of nucleobase-containing compound metabolic process positive regulation of cellular process regulation of RNA biosynthetic process regulation of biosynthetic process regulation of transcription by RNA polymerase II regulation of biological process positive regulation of nucleobase-containing compound metabolic process positive regulation of transcription initiation by RNA polymerase II biological regulation regulation of macromolecule metabolic process positive regulation of transcription by RNA polymerase II positive regulation of DNA-templated transcription initiation positive regulation of RNA metabolic process regulation of gene expression positive regulation of RNA biosynthetic process regulation of transcription initiation by RNA polymerase II regulation of macromolecule biosynthetic process regulation of DNA-templated transcription regulation of metabolic process transcription preinitiation complex assembly cellular component biogenesis cellular component assembly protein-containing complex assembly protein-DNA complex assembly RNA polymerase II preinitiation complex assembly DNA-templated transcription termination termination of RNA polymerase II transcription cellular response to stimulus cellular response to heat response to stimulus cellular response to stress response to stress response to heat response to abiotic stimulus response to temperature stimulus transcription elongation by RNA polymerase II positive regulation of transcription elongation by RNA polymerase II positive regulation of DNA-templated transcription, elongation regulation of DNA-templated transcription elongation regulation of transcription elongation by RNA polymerase II DNA-templated transcription elongation	RNA polymerase II transcription regulator complex membrane-bounded organelle protein-containing complex intracellular anatomical structure core mediator complex nucleus nuclear protein-containing complex transcription regulator complex intracellular membrane-bounded organelle intracellular organelle cellular anatomical structure organelle mediator complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, C, E, G	IPR013921	Mediator complex, subunit Med20	Family
A, C, E, G	IPR016532	Mediator of RNA polymerase II transcription subunit 20	Family
B, D, F, H	IPR019095	Mediator complex, subunit Med18	Family

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.