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Open data
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Basic information
| Entry | Database: EMDB / ID: EMD-11695 | |||||||||
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| Title | Human pre-Bact-1 spliceosome | |||||||||
Map data | Unmasked/unsharpened map of the pre-Bact-1 complex. | |||||||||
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Keywords | Complex / spliceosome / catalytic activation / splicing | |||||||||
| Function / homology | Function and homology informationprotein localization to P-body / positive regulation of RNA binding / snRNA export from nucleus / DNA topoisomerase binding / RS domain binding / nuclear cap binding complex / histone mRNA metabolic process / RNA cap binding complex / microfibril / mRNA metabolic process ...protein localization to P-body / positive regulation of RNA binding / snRNA export from nucleus / DNA topoisomerase binding / RS domain binding / nuclear cap binding complex / histone mRNA metabolic process / RNA cap binding complex / microfibril / mRNA metabolic process / Lsm2-8 complex / U6 snRNA 3'-end binding / positive regulation of RNA export from nucleus / mRNA decay by 5' to 3' exoribonuclease / Lsm1-7-Pat1 complex / protein kinase B binding / positive regulation of mRNA 3'-end processing / cap-dependent translational initiation / U6 snRNP / U11/U12 snRNP / PH domain binding / Processing of Intronless Pre-mRNAs / regulation of retinoic acid receptor signaling pathway / interleukin-17-mediated signaling pathway / RNA cap binding / U2 snRNP binding / U7 snRNA binding / histone pre-mRNA DCP binding / snRNA binding / U7 snRNP / cis assembly of pre-catalytic spliceosome / histone pre-mRNA 3'end processing complex / regulation of mRNA processing / primary miRNA processing / miRNA-mediated post-transcriptional gene silencing / regulation of vitamin D receptor signaling pathway / mRNA splice site recognition / SLBP independent Processing of Histone Pre-mRNAs / SLBP Dependent Processing of Replication-Dependent Histone Pre-mRNAs / spliceosome conformational change to release U4 (or U4atac) and U1 (or U11) / B-WICH complex / miRNA processing / regulatory ncRNA-mediated post-transcriptional gene silencing / nuclear retinoic acid receptor binding / Transport of the SLBP independent Mature mRNA / protein methylation / RNA 7-methylguanosine cap binding / Transport of the SLBP Dependant Mature mRNA / alternative mRNA splicing, via spliceosome / U12-type spliceosomal complex / 7-methylguanosine cap hypermethylation / U1 snRNP binding / U2-type catalytic step 1 spliceosome / RNA splicing, via transesterification reactions / methylosome / pre-mRNA binding / pICln-Sm protein complex / regulation of mRNA splicing, via spliceosome / positive regulation of mRNA splicing, via spliceosome / mRNA 3'-end processing / snRNP binding / Transport of Mature mRNA Derived from an Intronless Transcript / transcription elongation factor activity / blastocyst formation / sno(s)RNA-containing ribonucleoprotein complex / small nuclear ribonucleoprotein complex / splicing factor binding / Notch binding / host-mediated activation of viral transcription / SMN-Sm protein complex / spliceosomal tri-snRNP complex / mRNA stabilization / mRNA 3'-end processing / mRNA cis splicing, via spliceosome / U2-type precatalytic spliceosome / P granule / positive regulation of vitamin D receptor signaling pathway / telomerase holoenzyme complex / commitment complex / telomerase RNA binding / nuclear vitamin D receptor binding / RNA polymerase binding / U2-type prespliceosome assembly / U2-type spliceosomal complex / Transport of Mature mRNA derived from an Intron-Containing Transcript / Regulation of gene expression in late stage (branching morphogenesis) pancreatic bud precursor cells / RUNX3 regulates NOTCH signaling / U2-type catalytic step 2 spliceosome / NOTCH4 Intracellular Domain Regulates Transcription / RNA catabolic process / P-body assembly / signal transduction involved in regulation of gene expression / SAGA complex / U2 snRNP / RHOBTB1 GTPase cycle / Abortive elongation of HIV-1 transcript in the absence of Tat / RNA Polymerase II Transcription Termination / U1 snRNP / nuclear-transcribed mRNA catabolic process, nonsense-mediated decay / regulation of translational initiation Similarity search - Function | |||||||||
| Biological species | Homo sapiens (human) / synthetic construct (others) | |||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 7.8 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_11695.map.gz | 170.7 MB | EMDB map data format | |
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| Header (meta data) | emd-11695-v30.xml emd-11695.xml | 83.8 KB 83.8 KB | Display Display | EMDB header |
| Images | emd_11695.png | 41.1 KB | ||
| Filedesc metadata | emd-11695.cif.gz | 22 KB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-11695 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-11695 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 7abgMC ![]() 7aavC ![]() 7abfC ![]() 7abhC ![]() 7abiC C: citing same article ( M: atomic model generated by this map |
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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_11695.map.gz / Format: CCP4 / Size: 216 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Annotation | Unmasked/unsharpened map of the pre-Bact-1 complex. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 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
+Macromolecule #1: Nuclear cap-binding protein subunit 1
+Macromolecule #2: U6 snRNA-associated Sm-like protein LSm7
+Macromolecule #3: Splicing factor 3B subunit 6
+Macromolecule #4: Splicing factor 3A subunit 2
+Macromolecule #5: U5 small nuclear ribonucleoprotein 40 kDa protein
+Macromolecule #6: U2 small nuclear ribonucleoprotein A'
+Macromolecule #7: U2 small nuclear ribonucleoprotein B''
+Macromolecule #8: U5 small nuclear ribonucleoprotein 200 kDa helicase
+Macromolecule #9: Protein BUD31 homolog
+Macromolecule #10: Nuclear cap-binding protein subunit 2
+Macromolecule #12: Cell division cycle 5-like protein
+Macromolecule #13: Spliceosome-associated protein CWC15 homolog
+Macromolecule #14: U6 snRNA-associated Sm-like protein LSm2
+Macromolecule #15: U6 snRNA-associated Sm-like protein LSm3
+Macromolecule #16: U6 snRNA-associated Sm-like protein LSm4
+Macromolecule #17: U6 snRNA-associated Sm-like protein LSm5
+Macromolecule #18: U6 snRNA-associated Sm-like protein LSm6
+Macromolecule #20: U6 snRNA-associated Sm-like protein LSm8
+Macromolecule #21: Microfibrillar-associated protein 1
+Macromolecule #22: PHD finger-like domain-containing protein 5A
+Macromolecule #23: Pleiotropic regulator 1
+Macromolecule #25: Pre-mRNA-processing-splicing factor 8
+Macromolecule #26: Pre-mRNA-splicing factor 38A
+Macromolecule #27: Pre-mRNA-splicing factor RBM22
+Macromolecule #28: Splicing factor 3A subunit 1
+Macromolecule #29: Splicing factor 3A subunit 3
+Macromolecule #30: Transcription elongation regulator 1
+Macromolecule #31: Splicing factor 3B subunit 1
+Macromolecule #32: Splicing factor 3B subunit 2
+Macromolecule #33: Splicing factor 3B subunit 3
+Macromolecule #34: Splicing factor 3B subunit 4
+Macromolecule #35: Splicing factor 3B subunit 5
+Macromolecule #36: SNW domain-containing protein 1
+Macromolecule #37: Smad nuclear-interacting protein 1
+Macromolecule #38: Zinc finger matrin-type protein 2
+Macromolecule #39: 116 kDa U5 small nuclear ribonucleoprotein component
+Macromolecule #40: Serine/arginine repetitive matrix protein 1
+Macromolecule #42: Serine/arginine-rich splicing factor 1
+Macromolecule #43: Small nuclear ribonucleoprotein Sm D2
+Macromolecule #44: Small nuclear ribonucleoprotein F
+Macromolecule #45: Small nuclear ribonucleoprotein-associated proteins B and B'
+Macromolecule #46: Small nuclear ribonucleoprotein Sm D3
+Macromolecule #47: Small nuclear ribonucleoprotein G
+Macromolecule #48: Small nuclear ribonucleoprotein E
+Macromolecule #49: Small nuclear ribonucleoprotein Sm D1
+Macromolecule #50: Ubiquitin-like protein 5
+Macromolecule #51: WW domain-binding protein 11
+Macromolecule #11: U5 snRNA
+Macromolecule #19: U2 snRNA
+Macromolecule #24: MINX M3 pre-mRNA
+Macromolecule #41: U6 snRNA
+Macromolecule #52: INOSITOL HEXAKISPHOSPHATE
+Macromolecule #53: GUANOSINE-5'-TRIPHOSPHATE
+Macromolecule #54: MAGNESIUM ION
+Macromolecule #55: 7-METHYL-GUANOSINE-5'-TRIPHOSPHATE-5'-GUANOSINE
-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
| Startup model | Type of model: OTHER / Details: cryoSPARC ab initio reconstruction |
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| Final reconstruction | Resolution.type: BY AUTHOR / Resolution: 7.8 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 3.0) / Number images used: 84539 |
| Initial angle assignment | Type: MAXIMUM LIKELIHOOD |
| Final angle assignment | Type: MAXIMUM LIKELIHOOD |
-Atomic model buiding 1
| Refinement | Space: REAL / Protocol: RIGID BODY FIT |
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| Output model | ![]() PDB-7abg: |
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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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