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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-4255 | |||||||||
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Title | human Bact spliceosome core structure | |||||||||
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![]() | spliceosome / human / HELA / BACT / dynamics / SPLICING | |||||||||
Function / homology | ![]() RES complex / negative regulation of chemokine-mediated signaling pathway / snoRNA splicing / U11/U12 snRNP / regulation of retinoic acid receptor signaling pathway / post-mRNA release spliceosomal complex / regulation of vitamin D receptor signaling pathway / B-WICH complex / splicing factor binding / nuclear retinoic acid receptor binding ...RES complex / negative regulation of chemokine-mediated signaling pathway / snoRNA splicing / U11/U12 snRNP / regulation of retinoic acid receptor signaling pathway / post-mRNA release spliceosomal complex / regulation of vitamin D receptor signaling pathway / B-WICH complex / splicing factor binding / nuclear retinoic acid receptor binding / embryonic brain development / U12-type spliceosomal complex / RNA splicing, via transesterification reactions / mRNA 3'-end processing / blastocyst formation / regulation of mRNA splicing, via spliceosome / C2H2 zinc finger domain binding / U2-type catalytic step 1 spliceosome / positive regulation of mRNA splicing, via spliceosome / pre-mRNA binding / positive regulation by host of viral transcription / U2-type precatalytic spliceosome / U2-type spliceosomal complex / positive regulation of vitamin D receptor signaling pathway / mRNA cis splicing, via spliceosome / U2-type prespliceosome assembly / Transport of Mature mRNA derived from an Intron-Containing Transcript / nuclear vitamin D receptor binding / Notch binding / Regulation of gene expression in late stage (branching morphogenesis) pancreatic bud precursor cells / U2-type catalytic step 2 spliceosome / RUNX3 regulates NOTCH signaling / NOTCH4 Intracellular Domain Regulates Transcription / SAGA complex / RHOBTB1 GTPase cycle / U2 snRNP / RNA Polymerase II Transcription Termination / NOTCH3 Intracellular Domain Regulates Transcription / U2-type prespliceosome / WD40-repeat domain binding / protein peptidyl-prolyl isomerization / positive regulation of transcription by RNA polymerase III / positive regulation of neurogenesis / nuclear androgen receptor binding / K63-linked polyubiquitin modification-dependent protein binding / precatalytic spliceosome / Notch-HLH transcription pathway / Formation of paraxial mesoderm / positive regulation of transforming growth factor beta receptor signaling pathway / SMAD binding / positive regulation of transcription by RNA polymerase I / spliceosomal complex assembly / regulation of RNA splicing / mRNA Splicing - Minor Pathway / mRNA 3'-splice site recognition / spliceosomal tri-snRNP complex assembly / Prp19 complex / U5 snRNA binding / intrinsic apoptotic signaling pathway in response to DNA damage by p53 class mediator / protein localization to nucleus / U5 snRNP / positive regulation of G1/S transition of mitotic cell cycle / U2 snRNA binding / U6 snRNA binding / pre-mRNA intronic binding / regulation of DNA repair / Cajal body / RHOBTB2 GTPase cycle / retinoic acid receptor signaling pathway / U1 snRNA binding / U4/U6 x U5 tri-snRNP complex / cellular response to retinoic acid / catalytic step 2 spliceosome / mRNA Splicing - Major Pathway / RNA splicing / positive regulation of RNA splicing / DNA damage checkpoint signaling / peptidyl-prolyl cis-trans isomerase activity / positive regulation of protein export from nucleus / nuclear receptor binding / RNA polymerase II transcription regulatory region sequence-specific DNA binding / RNA polymerase II CTD heptapeptide repeat P3 isomerase activity / RNA polymerase II CTD heptapeptide repeat P6 isomerase activity / peptidylprolyl isomerase / stem cell differentiation / spliceosomal complex / Downregulation of SMAD2/3:SMAD4 transcriptional activity / response to cocaine / RING-type E3 ubiquitin transferase / negative regulation of protein catabolic process / mRNA splicing, via spliceosome / positive regulation of neuron projection development / B-WICH complex positively regulates rRNA expression / Pre-NOTCH Transcription and Translation / NOTCH1 Intracellular Domain Regulates Transcription / Constitutive Signaling by NOTCH1 PEST Domain Mutants / Constitutive Signaling by NOTCH1 HD+PEST Domain Mutants / positive regulation of protein import into nucleus / nuclear matrix / fibrillar center Similarity search - Function | |||||||||
Biological species | ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.4 Å | |||||||||
![]() | Haselbach D / Komarov I / Agafonov D / Hartmuth K / Graf B / Kastner B | |||||||||
![]() | ![]() Title: Structure and Conformational Dynamics of the Human Spliceosomal B Complex. Authors: David Haselbach / Ilya Komarov / Dmitry E Agafonov / Klaus Hartmuth / Benjamin Graf / Olexandr Dybkov / Henning Urlaub / Berthold Kastner / Reinhard Lührmann / Holger Stark / ![]() Abstract: The spliceosome is a highly dynamic macromolecular complex that precisely excises introns from pre-mRNA. Here we report the cryo-EM 3D structure of the human B spliceosome at 3.4 Å resolution. In ...The spliceosome is a highly dynamic macromolecular complex that precisely excises introns from pre-mRNA. Here we report the cryo-EM 3D structure of the human B spliceosome at 3.4 Å resolution. In the B state, the spliceosome is activated but not catalytically primed, so that it is functionally blocked prior to the first catalytic step of splicing. The spliceosomal core is similar to the yeast B spliceosome; important differences include the presence of the RNA helicase aquarius and peptidyl prolyl isomerases. To examine the overall dynamic behavior of the purified spliceosome, we developed a principal component analysis-based approach. Calculating the energy landscape revealed eight major conformational states, which we refined to higher resolution. Conformational differences of the highly flexible structural components between these eight states reveal how spliceosomal components contribute to the assembly of the spliceosome, allowing it to generate a dynamic interaction network required for its subsequent catalytic activation. | |||||||||
History |
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Structure visualization
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Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 25.1 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 56 KB 56 KB | Display Display | ![]() |
Images | ![]() | 53.1 KB | ||
Filedesc metadata | ![]() | 18.2 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 6ff4MC ![]() 4233C ![]() 4234C ![]() 4235C ![]() 4236C ![]() 4237C ![]() 4238C ![]() 4239C ![]() 4240C ![]() 4247C ![]() 4248C ![]() 4249C ![]() 4250C ![]() 4251C ![]() 4252C ![]() 4253C ![]() 4254C ![]() 6ff7C C: citing same article ( M: atomic model generated by this map |
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Similar structure data |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
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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 : human Bact spliceosome state 1 unmasked
+Supramolecule #1: human Bact spliceosome state 1 unmasked
+Macromolecule #1: RNA-binding motif protein, X-linked 2
+Macromolecule #3: BUD13 homolog
+Macromolecule #6: Splicing factor 3A subunit 2
+Macromolecule #7: Splicing factor 3B subunit 2
+Macromolecule #8: Pre-mRNA-processing-splicing factor 8
+Macromolecule #9: 116 kDa U5 small nuclear ribonucleoprotein component
+Macromolecule #10: SNW domain-containing protein 1
+Macromolecule #11: Pleiotropic regulator 1
+Macromolecule #12: Pre-mRNA-processing factor 17
+Macromolecule #13: Cell division cycle 5-like protein
+Macromolecule #14: Crooked neck-like protein 1
+Macromolecule #15: Pre-mRNA-splicing factor RBM22
+Macromolecule #16: Protein BUD31 homolog
+Macromolecule #17: Spliceosome-associated protein CWC15 homolog
+Macromolecule #18: Serine/arginine repetitive matrix protein 2
+Macromolecule #19: Peptidyl-prolyl cis-trans isomerase-like 1
+Macromolecule #20: Serine/arginine repetitive matrix protein 1
+Macromolecule #22: Peptidyl-prolyl cis-trans isomerase CWC27 homolog
+Macromolecule #23: RING finger protein 113A
+Macromolecule #24: Splicing factor 3B subunit 1
+Macromolecule #25: Splicing factor 3B subunit 3
+Macromolecule #26: Splicing factor 3B subunit 5
+Macromolecule #27: PHD finger-like domain-containing protein 5A
+Macromolecule #28: Splicing factor 3B subunit 6
+Macromolecule #2: U2 snRNA
+Macromolecule #4: U5 snRNA
+Macromolecule #5: U6 snRNA
+Macromolecule #21: pre mRNA
+Macromolecule #29: MAGNESIUM ION
+Macromolecule #30: INOSITOL HEXAKISPHOSPHATE
+Macromolecule #31: GUANOSINE-5'-TRIPHOSPHATE
+Macromolecule #32: ZINC ION
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Concentration | 0.05 mg/mL | ||||||||||||
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Buffer | pH: 7.9 Component:
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Grid | Model: Quantifoil R3.5/1 / Material: COPPER / Mesh: 400 / Support film - #0 - Film type ID: 1 / Support film - #0 - Material: CARBON / Support film - #0 - topology: HOLEY / Support film - #1 - Film type ID: 2 / Support film - #1 - Material: CARBON / Support film - #1 - topology: CONTINUOUS | ||||||||||||
Vitrification | Cryogen name: ETHANE / Chamber humidity: 75 % / Chamber temperature: 277 K / Instrument: LEICA EM GP / Details: blot with blotting sensor. |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Alignment procedure | Coma free - Residual tilt: 14.0 mrad |
Specialist optics | Spherical aberration corrector: Microscope was modified with a Cs corrector with two hexapoles elements |
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 / Number grids imaged: 1 / Number real images: 32000 / Average exposure time: 1.0 sec. / Average electron dose: 40.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | C2 aperture diameter: 70.0 µm / Illumination mode: SPOT SCAN / Imaging mode: BRIGHT FIELD / Cs: 0.001 mm / Nominal defocus max: 4.5 µm / Nominal defocus min: 0.8 µm / Nominal magnification: 59000 |
Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
-Atomic model buiding 1
Refinement | Protocol: RIGID BODY FIT |
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Output model | ![]() PDB-6ff4: |