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Open data
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Basic information
| Entry | Database: EMDB / ID: EMD-11694 | |||||||||
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| Title | Human pre-Bact-1 spliceosome core structure | |||||||||
Map data | Sharpened/masked map for pre-Bact-1 core structure. | |||||||||
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Keywords | Complex / spliceosome / catalytic activation / splicing | |||||||||
| Function / homology | Function and homology informationmicrofibril / regulation of vitamin D receptor signaling pathway / regulation of retinoic acid receptor signaling pathway / protein phosphatase regulator activity / positive regulation of mRNA splicing, via spliceosome / nuclear retinoic acid receptor binding / U2-type catalytic step 1 spliceosome / RNA splicing, via transesterification reactions / positive regulation of vitamin D receptor signaling pathway / host-mediated activation of viral transcription ...microfibril / regulation of vitamin D receptor signaling pathway / regulation of retinoic acid receptor signaling pathway / protein phosphatase regulator activity / positive regulation of mRNA splicing, via spliceosome / nuclear retinoic acid receptor binding / U2-type catalytic step 1 spliceosome / RNA splicing, via transesterification reactions / positive regulation of vitamin D receptor signaling pathway / host-mediated activation of viral transcription / U2-type precatalytic spliceosome / mRNA cis splicing, via spliceosome / RNA polymerase binding / Regulation of gene expression in late stage (branching morphogenesis) pancreatic bud precursor cells / RUNX3 regulates NOTCH signaling / U2-type catalytic step 2 spliceosome / Notch binding / U2-type spliceosomal complex / nuclear vitamin D receptor binding / NOTCH4 Intracellular Domain Regulates Transcription / transcription elongation factor activity / positive regulation of neurogenesis / spliceosome conformational change to release U4 (or U4atac) and U1 (or U11) / NOTCH3 Intracellular Domain Regulates Transcription / mRNA stabilization / : / K63-linked polyubiquitin modification-dependent protein binding / nuclear androgen receptor binding / precatalytic spliceosome / WW domain binding / Notch-HLH transcription pathway / Formation of paraxial mesoderm / ubiquitin-like protein conjugating enzyme binding / negative regulation of transcription elongation by RNA polymerase II / positive regulation of transforming growth factor beta receptor signaling pathway / SMAD binding / mRNA Splicing - Minor Pathway / intrinsic apoptotic signaling pathway in response to DNA damage by p53 class mediator / Prp19 complex / negative regulation of mRNA splicing, via spliceosome / spliceosomal tri-snRNP complex assembly / U5 snRNP / U5 snRNA binding / pre-mRNA intronic binding / U2 snRNA binding / U6 snRNA binding / U4/U6 x U5 tri-snRNP complex / Cajal body / U1 snRNA binding / retinoic acid receptor signaling pathway / cellular response to retinoic acid / spliceosomal snRNP assembly / catalytic step 2 spliceosome / spliceosomal complex / mRNA Splicing - Major Pathway / RNA splicing / nuclear receptor binding / cellular response to xenobiotic stimulus / cellular response to tumor necrosis factor / response to cocaine / positive regulation of transcription elongation by RNA polymerase II / Downregulation of SMAD2/3:SMAD4 transcriptional activity / mRNA splicing, via spliceosome / fibrillar center / NOTCH1 Intracellular Domain Regulates Transcription / Pre-NOTCH Transcription and Translation / Constitutive Signaling by NOTCH1 PEST Domain Mutants / Constitutive Signaling by NOTCH1 HD+PEST Domain Mutants / transcription coregulator activity / mRNA processing / mRNA Polyadenylation / nuclear matrix / protein tag activity / rRNA processing / transcription corepressor activity / cellular response to lipopolysaccharide / single-stranded DNA binding / nuclear membrane / Dengue Virus-Host Interactions / RNA polymerase II-specific DNA-binding transcription factor binding / transcription coactivator activity / nuclear speck / negative regulation of DNA-templated transcription / GTPase activity / regulation of transcription by RNA polymerase II / GTP binding / chromatin / negative regulation of transcription by RNA polymerase II / enzyme binding / positive regulation of transcription by RNA polymerase II / DNA binding / DNA-templated transcription / RNA binding / nucleoplasm / zinc ion binding / membrane / identical protein binding / nucleus / cytosol / cytoplasm Similarity search - Function | |||||||||
| Biological species | Homo sapiens (human) / synthetic construct (others) | |||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 3.9 Å | |||||||||
Authors | Townsend C / Kastner B | |||||||||
| Funding support | Germany, 1 items
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Citation | Journal: Science / Year: 2020Title: Mechanism of protein-guided folding of the active site U2/U6 RNA during spliceosome activation. Authors: Cole Townsend / Majety N Leelaram / Dmitry E Agafonov / Olexandr Dybkov / Cindy L Will / Karl Bertram / Henning Urlaub / Berthold Kastner / Holger Stark / Reinhard Lührmann / ![]() Abstract: Spliceosome activation involves extensive protein and RNA rearrangements that lead to formation of a catalytically active U2/U6 RNA structure. At present, little is known about the assembly pathway ...Spliceosome activation involves extensive protein and RNA rearrangements that lead to formation of a catalytically active U2/U6 RNA structure. At present, little is known about the assembly pathway of the latter and the mechanism whereby proteins aid its proper folding. Here, we report the cryo-electron microscopy structures of two human, activated spliceosome precursors (that is, pre-B complexes) at core resolutions of 3.9 and 4.2 angstroms. These structures elucidate the order of the numerous protein exchanges that occur during activation, the mutually exclusive interactions that ensure the correct order of ribonucleoprotein rearrangements needed to form the U2/U6 catalytic RNA, and the stepwise folding pathway of the latter. Structural comparisons with mature B complexes reveal the molecular mechanism whereby a conformational change in the scaffold protein PRP8 facilitates final three-dimensional folding of the U2/U6 catalytic RNA. | |||||||||
| History |
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Structure visualization
| Movie |
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| Structure viewer | EM map: SurfView Molmil Jmol/JSmol |
| Supplemental images |
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Downloads & links
-EMDB archive
| Map data | emd_11694.map.gz | 14.5 MB | EMDB map data format | |
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| Header (meta data) | emd-11694-v30.xml emd-11694.xml | 36.3 KB 36.3 KB | Display Display | EMDB header |
| Images | emd_11694.png | 33.8 KB | ||
| Filedesc metadata | emd-11694.cif.gz | 12.2 KB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-11694 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-11694 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 7abfMC ![]() 7aavC ![]() 7abgC ![]() 7abhC ![]() 7abiC M: atomic model generated by this map C: citing same article ( |
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| Similar structure data | |
| EM raw data | EMPIAR-10616 (Title: Cryo-EM dataset of human pre-Bact spliceosome / Data size: 584.5 Data #1: Motion-corrected micrographs (without dose-weighting) of human pre-Bact spliceosome [micrographs - single frame] Data #2: Motion-corrected micrographs (with dose-weighting) of human pre-Bact spliceosome [micrographs - single frame]) |
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Links
| EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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| Related items in Molecule of the Month |
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Map
| File | Download / File: emd_11694.map.gz / Format: CCP4 / Size: 216 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Annotation | Sharpened/masked map for pre-Bact-1 core structure. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Voxel size | X=Y=Z: 1.16 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Density |
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| Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Details | EMDB XML:
CCP4 map header:
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-Supplemental data
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Sample components
+Entire : pre-Bact-1 spliceosomal complex
+Supramolecule #1: pre-Bact-1 spliceosomal complex
+Supramolecule #2: pre-Bact-1 spliceosomal complex
+Supramolecule #3: MINX M3 RNA
+Macromolecule #1: Protein BUD31 homolog
+Macromolecule #2: Pre-mRNA-splicing factor 38A
+Macromolecule #3: Pre-mRNA-processing-splicing factor 8
+Macromolecule #4: 116 kDa U5 small nuclear ribonucleoprotein component
+Macromolecule #5: Zinc finger matrin-type protein 2
+Macromolecule #6: Ubiquitin-like protein 5
+Macromolecule #7: Spliceosome-associated protein CWC15 homolog
+Macromolecule #10: WW domain-binding protein 11
+Macromolecule #11: SNW domain-containing protein 1
+Macromolecule #12: Pleiotropic regulator 1
+Macromolecule #14: Microfibrillar-associated protein 1
+Macromolecule #15: Transcription elongation regulator 1
+Macromolecule #8: U5 small nuclear RNA
+Macromolecule #9: U6 small nuclear RNA
+Macromolecule #13: MINX M3 RNA
+Macromolecule #16: INOSITOL HEXAKISPHOSPHATE
+Macromolecule #17: GUANOSINE-5'-TRIPHOSPHATE
+Macromolecule #18: MAGNESIUM ION
-Experimental details
-Structure determination
| Method | cryo EM |
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Processing | single particle reconstruction |
| Aggregation state | particle |
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Sample preparation
| Buffer | pH: 7.9 |
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| Grid | Model: Quantifoil R3.5/1 / Material: COPPER / Support film - Material: CARBON / Support film - topology: CONTINUOUS |
| Vitrification | Cryogen name: ETHANE / Instrument: FEI VITROBOT MARK IV |
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Electron microscopy
| Microscope | FEI TITAN KRIOS |
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| Image recording | Film or detector model: FEI FALCON III (4k x 4k) / Detector mode: INTEGRATING / Digitization - Dimensions - Width: 4096 pixel / Digitization - Dimensions - Height: 4096 pixel / Average exposure time: 1.0 sec. / Average electron dose: 2.25 e/Å2 |
| Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
| Electron optics | Illumination mode: SPOT SCAN / Imaging mode: BRIGHT FIELD |
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
-Atomic model buiding 1
| Refinement | Space: REAL / Protocol: RIGID BODY FIT |
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| Output model | ![]() PDB-7abf: |
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About Yorodumi



Keywords
Homo sapiens (human)
Authors
Germany, 1 items
Citation
UCSF Chimera






























Z (Sec.)
Y (Row.)
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