- EMDB-18376: RNA polymerase II bound to minimal Alu RNA right arm in the alter... -
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Open data
ID or keywords:
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Basic information
Entry
Database: EMDB / ID: EMD-18376
Title
RNA polymerase II bound to minimal Alu RNA right arm in the alternative conformation
Map data
Sharpened map (auto B-factor)
Sample
Complex: RNA polymerase II bound to Alu RNA minimal right arm
Complex: RNA polymerase II
Protein or peptide: x 10 types
Complex: Alu RNA Minimal Right Arm
RNA: x 1 types
Ligand: x 2 types
Keywords
transcription inhibition / noncoding RNA / RNA polymerase II / Alu RNA / TRANSCRIPTION
Function / homology
Function and homology information
Formation of RNA Pol II elongation complex / Formation of the Early Elongation Complex / Transcriptional regulation by small RNAs / RNA Polymerase II Pre-transcription Events / TP53 Regulates Transcription of DNA Repair Genes / FGFR2 alternative splicing / RNA polymerase II transcribes snRNA genes / mRNA Capping / mRNA Splicing - Minor Pathway / Processing of Capped Intron-Containing Pre-mRNA ...Formation of RNA Pol II elongation complex / Formation of the Early Elongation Complex / Transcriptional regulation by small RNAs / RNA Polymerase II Pre-transcription Events / TP53 Regulates Transcription of DNA Repair Genes / FGFR2 alternative splicing / RNA polymerase II transcribes snRNA genes / mRNA Capping / mRNA Splicing - Minor Pathway / Processing of Capped Intron-Containing Pre-mRNA / RNA Polymerase II Promoter Escape / RNA Polymerase II Transcription Pre-Initiation And Promoter Opening / RNA Polymerase II Transcription Initiation / RNA Polymerase II Transcription Elongation / RNA Polymerase II Transcription Initiation And Promoter Clearance / RNA Pol II CTD phosphorylation and interaction with CE / Estrogen-dependent gene expression / Formation of TC-NER Pre-Incision Complex / Dual incision in TC-NER / Gap-filling DNA repair synthesis and ligation in TC-NER / mRNA Splicing - Major Pathway / nuclear lumen / maintenance of transcriptional fidelity during transcription elongation by RNA polymerase II / transcription by RNA polymerase III / transcription by RNA polymerase I / RNA polymerase I complex / RNA polymerase III complex / transcription elongation by RNA polymerase I / transcription-coupled nucleotide-excision repair / RNA polymerase II, core complex / tRNA transcription by RNA polymerase III / : / DNA-directed RNA polymerase activity / DNA-directed RNA polymerase complex / transcription initiation at RNA polymerase II promoter / ribonucleoside binding / : / : / : / : / : / : / fibrillar center / DNA-directed RNA polymerase / transcription by RNA polymerase II / nucleic acid binding / protein dimerization activity / DNA-templated transcription / nucleolus / mitochondrion / DNA binding / zinc ion binding / metal ion binding / nucleus / cytosol Similarity search - Function
DNA-directed RNA polymerase subunit beta / RNA polymerase II, I and III subunit K / DNA-directed RNA polymerases I, II, and III subunit RPABC2 / DNA-directed RNA polymerases I, II, and III subunit RPABC5 / DNA-directed RNA polymerase subunit / DNA-directed RNA polymerase II subunit RPB11-a / DNA-directed RNA polymerases I, II, and III subunit RPABC3 / DNA-directed RNA polymerase II subunit RPB3 / DNA-directed RNA polymerase II subunit E / DNA-directed RNA polymerase II subunit RPB9 Similarity search - Component
Biological species
Sus scrofa domesticus (domestic pig) / Homo sapiens (human)
Method
single particle reconstruction / cryo EM / Resolution: 3.1 Å
Journal: Nat Struct Mol Biol / Year: 2025 Title: Mechanism of mammalian transcriptional repression by noncoding RNA. Authors: Katarína Tlučková / Beata Kaczmarek / Anita Salmazo / Carrie Bernecky / Abstract: Transcription by RNA polymerase II (Pol II) can be repressed by noncoding RNA, including the human RNA Alu. However, the mechanism by which endogenous RNAs repress transcription remains unclear. Here ...Transcription by RNA polymerase II (Pol II) can be repressed by noncoding RNA, including the human RNA Alu. However, the mechanism by which endogenous RNAs repress transcription remains unclear. Here we present cryogenic-electron microscopy structures of Pol II bound to Alu RNA, which reveal that Alu RNA mimics how DNA and RNA bind to Pol II during transcription elongation. Further, we show how distinct domains of the general transcription factor TFIIF control repressive activity. Together, we reveal how a noncoding RNA can regulate mammalian gene expression.
Name: ZINC ION / type: ligand / ID: 12 / Number of copies: 7 / Formula: ZN
Molecular weight
Theoretical: 65.409 Da
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Macromolecule #13: MAGNESIUM ION
Macromolecule
Name: MAGNESIUM ION / type: ligand / ID: 13 / Number of copies: 1 / Formula: MG
Molecular weight
Theoretical: 24.305 Da
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Experimental details
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Structure determination
Method
cryo EM
Processing
single particle reconstruction
Aggregation state
particle
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Sample preparation
Concentration
0.2 mg/mL
Buffer
pH: 7.25 Component:
Concentration
Name
Formula
5.0 mM
HEPES
50.0 mM
NaCl
NaCl
0.01 mM
ZnCl2
ZnCl2
10.0 mM
DTT
Grid
Model: Quantifoil R1.2/1.3 / Material: COPPER / Mesh: 300 / Support film - Material: GRAPHENE OXIDE / Support film - topology: CONTINUOUS
Vitrification
Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277.15 K / Instrument: FEI VITROBOT MARK IV
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Electron microscopy
Microscope
FEI TITAN KRIOS
Specialist optics
Energy filter - Name: GIF Bioquantum / Energy filter - Slit width: 10 eV
Image recording
Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Detector mode: COUNTING / Number grids imaged: 1 / Number real images: 7588 / Average exposure time: 1.81 sec. / Average electron dose: 41.0 e/Å2
Electron beam
Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
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