- EMDB-52443: Overall map of the EC-DSIF-PAF-SPT6-RECQL5 complex -
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Open data
ID or keywords:
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Basic information
Entry
Database: EMDB / ID: EMD-52443
Title
Overall map of the EC-DSIF-PAF-SPT6-RECQL5 complex
Map data
Locally filtered and sharpened overall map of ECstar-RECQL5
Sample
Complex: Pol II-DSIF-PAF-SPT6-RECQL5 complex
Protein or peptide: x 21 types
DNA: x 2 types
RNA: x 1 types
Ligand: x 2 types
Keywords
transcription elongation / DNA helicase / transcription-coupled repair / RNA polymerase II / TRANSCRIPTION
Function / homology
Function and homology information
mitotic DNA-templated DNA replication / blastocyst growth / Ski complex / RNA polymerase II C-terminal domain phosphoserine binding / mRNA decay by 3' to 5' exoribonuclease / positive regulation of mRNA 3'-end processing / Cdc73/Paf1 complex / inner cell mass cell differentiation / regulation of isotype switching / chromosome separation ...mitotic DNA-templated DNA replication / blastocyst growth / Ski complex / RNA polymerase II C-terminal domain phosphoserine binding / mRNA decay by 3' to 5' exoribonuclease / positive regulation of mRNA 3'-end processing / Cdc73/Paf1 complex / inner cell mass cell differentiation / regulation of isotype switching / chromosome separation / negative regulation of DNA-templated transcription, elongation / nuclear-transcribed mRNA catabolic process, 3'-5' exonucleolytic nonsense-mediated decay / regulation of muscle cell differentiation / endodermal cell fate commitment / regulation of mRNA export from nucleus / cellular response to camptothecin / negative regulation of myeloid cell differentiation / DSIF complex / positive regulation of cell cycle G1/S phase transition / trophectodermal cell differentiation / blastocyst hatching / regulation of transcription elongation by RNA polymerase II / replication-born double-strand break repair via sister chromatid exchange / regulation of mRNA processing / nucleosome organization / 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 / blastocyst formation / nuclear lumen / mRNA 3'-end processing / positive regulation of DNA-templated transcription, elongation / Abortive elongation of HIV-1 transcript in the absence of Tat / transcription preinitiation complex / DNA 3'-5' helicase / DNA metabolic process / 3'-5' DNA helicase activity / transcription elongation-coupled chromatin remodeling / stem cell population maintenance / interleukin-6-mediated signaling pathway / negative regulation of G1/S transition of mitotic cell cycle / RNA Pol II CTD phosphorylation and interaction with CE during HIV infection / RNA Pol II CTD phosphorylation and interaction with CE / negative regulation of gene expression, epigenetic / Formation of the Early Elongation Complex / Formation of the HIV-1 Early Elongation Complex / mRNA Capping / RNA polymerase II complex binding / negative regulation of transcription elongation by RNA polymerase II / maintenance of transcriptional fidelity during transcription elongation by RNA polymerase II / Pausing and recovery of Tat-mediated HIV elongation / Tat-mediated HIV elongation arrest and recovery / positive regulation of macroautophagy / RNA polymerase II transcribes snRNA genes / HIV elongation arrest and recovery / Pausing and recovery of HIV elongation / positive regulation of Wnt signaling pathway / protein localization to nucleus / mRNA transport / cell surface receptor signaling pathway via JAK-STAT / transcription by RNA polymerase III / Tat-mediated elongation of the HIV-1 transcript / negative regulation of double-strand break repair via homologous recombination / Formation of HIV-1 elongation complex containing HIV-1 Tat / transcription by RNA polymerase I / RNA polymerase I complex / transcription elongation by RNA polymerase I / RNA polymerase III complex / Formation of HIV elongation complex in the absence of HIV Tat / transcription-coupled nucleotide-excision repair / RNA polymerase II, core complex / tRNA transcription by RNA polymerase III / nucleosome binding / RNA Polymerase II Transcription Elongation / negative regulation of fibroblast proliferation / Formation of RNA Pol II elongation complex / DNA helicase activity / RNA Polymerase II Pre-transcription Events / rescue of stalled ribosome / DNA-directed RNA polymerase complex / SH2 domain binding / RNA splicing Similarity search - Function
DNA-directed RNA polymerase subunit beta / DNA-directed RNA polymerases I, II, and III subunit RPABC4 / DNA-directed RNA polymerases I, II, and III subunit RPABC2 / DNA-directed RNA polymerase subunit / RNA polymerase II subunit D / 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 subunit beta / DNA-directed RNA polymerases I, II, and III subunit RPABC4 / DNA-directed RNA polymerases I, II, and III subunit RPABC2 / DNA-directed RNA polymerase subunit / RNA polymerase II subunit D / 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 / Transcription elongation factor SPT5 / ATP-dependent DNA helicase Q5 / DNA-directed RNA polymerase II subunit RPB9 / Transcription elongation factor SPT4 / Parafibromin / RNA polymerase-associated protein CTR9 homolog / Transcription elongation factor SPT6 / RNA polymerase II-associated factor 1 homolog / RNA polymerase-associated protein LEO1 / Superkiller complex protein 8 Similarity search - Component
Biological species
Homo sapiens (human) / Sus scrofa domesticus (domestic pig) / synthetic construct (others)
Method
single particle reconstruction / cryo EM / Resolution: 2.0 Å
Journal: Nat Struct Mol Biol / Year: 2025 Title: Structural basis of RECQL5-induced RNA polymerase II transcription braking and subsequent reactivation. Authors: Luojia Zhang / Yuliya Gordiyenko / Tomos Morgan / Catarina Franco / Ana Tufegdžić Vidaković / Suyang Zhang / Abstract: Abnormally fast transcription elongation can lead to detrimental consequences such as transcription-replication collisions, altered alternative splicing patterns and genome instability. Therefore, ...Abnormally fast transcription elongation can lead to detrimental consequences such as transcription-replication collisions, altered alternative splicing patterns and genome instability. Therefore, elongating RNA polymerase II (Pol II) requires mechanisms to slow its progression, yet the molecular basis of transcription braking remains unclear. RECQL5 is a DNA helicase that functions as a general elongation factor by slowing down Pol II. Here we report cryo-electron microscopy structures of human RECQL5 bound to multiple transcription elongation complexes. Combined with biochemical analysis, we identify an α-helix of RECQL5 responsible for binding Pol II and slowdown of transcription elongation. We further reveal that the transcription-coupled DNA repair (TCR) complex allows Pol II to overcome RECQL5-induced transcription braking through concerted actions of its translocase activity and competition with RECQL5 for engaging Pol II. Additionally, RECQL5 inhibits TCR-mediated Pol II ubiquitination to prevent activation of the DNA repair pathway. Our results suggest a model in which RECQL5 and the TCR complex coordinately regulate transcription elongation rates to ensure transcription efficiency while maintaining genome stability.
Name: RNA / type: rna / ID: 16 / Number of copies: 1
Source (natural)
Organism: synthetic construct (others)
Molecular weight
Theoretical: 4.853993 KDa
Sequence
String:
GAGAGGGAAC CCACU
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Macromolecule #25: ZINC ION
Macromolecule
Name: ZINC ION / type: ligand / ID: 25 / Number of copies: 8 / Formula: ZN
Molecular weight
Theoretical: 65.409 Da
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Macromolecule #26: MAGNESIUM ION
Macromolecule
Name: MAGNESIUM ION / type: ligand / ID: 26 / 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: 7.5 Details: 20 mM HEPES pH 7.5, 50 mM KCl, 4 mM MgCl2, 1 mM DTT
Grid
Model: Quantifoil R3.5/1 / Material: COPPER / Mesh: 200 / Support film - Material: CARBON / Support film - topology: CONTINUOUS / Support film - Film thickness: 0.25 / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 15 sec.
Vitrification
Cryogen name: ETHANE / Chamber humidity: 100 % / Instrument: FEI VITROBOT MARK IV
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Electron microscopy
Microscope
TFS KRIOS
Image recording
Film or detector model: FEI FALCON IV (4k x 4k) / Number grids imaged: 2 / Number real images: 71964 / Average electron dose: 40.0 e/Å2
Electron beam
Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
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