+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-4240 | |||||||||
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Title | Human Bact spliceosome state 8 unmasked | |||||||||
Map data | ||||||||||
Sample |
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Function / homology | Function and homology information post-spliceosomal complex / RES complex / negative regulation of chemokine-mediated signaling pathway / snoRNA splicing / U11/U12 snRNP / post-mRNA release spliceosomal complex / regulation of retinoic acid receptor signaling pathway / 3'-5' RNA helicase activity / U2 snRNP binding / U7 snRNA binding ...post-spliceosomal complex / RES complex / negative regulation of chemokine-mediated signaling pathway / snoRNA splicing / U11/U12 snRNP / post-mRNA release spliceosomal complex / regulation of retinoic acid receptor signaling pathway / 3'-5' RNA helicase activity / U2 snRNP binding / U7 snRNA binding / histone pre-mRNA DCP binding / U7 snRNP / generation of catalytic spliceosome for first transesterification step / B-WICH complex / regulation of vitamin D receptor signaling pathway / histone pre-mRNA 3'end processing complex / cis assembly of pre-catalytic spliceosome / SLBP independent Processing of Histone Pre-mRNAs / SLBP Dependent Processing of Replication-Dependent Histone Pre-mRNAs / miRNA processing / embryonic brain development / splicing factor binding / spliceosome conformational change to release U4 (or U4atac) and U1 (or U11) / protein methylation / U12-type spliceosomal complex / methylosome / nuclear retinoic acid receptor binding / 7-methylguanosine cap hypermethylation / Prp19 complex / positive regulation of androgen receptor activity / poly(A) binding / snRNP binding / U1 snRNP binding / mRNA 3'-end processing / blastocyst formation / pICln-Sm protein complex / RNA splicing, via transesterification reactions / small nuclear ribonucleoprotein complex / pre-mRNA binding / U2-type catalytic step 1 spliceosome / sno(s)RNA-containing ribonucleoprotein complex / C2H2 zinc finger domain binding / regulation of mRNA splicing, via spliceosome / SMN-Sm protein complex / spliceosomal tri-snRNP complex / P granule / telomerase holoenzyme complex / mRNA cis splicing, via spliceosome / positive regulation by host of viral transcription / telomerase RNA binding / U2-type precatalytic spliceosome / U2-type spliceosomal complex / transcription regulator inhibitor activity / Transport of Mature mRNA derived from an Intron-Containing Transcript / commitment complex / positive regulation of vitamin D receptor signaling pathway / nuclear vitamin D receptor binding / U2-type prespliceosome assembly / U2-type catalytic step 2 spliceosome / Notch binding / positive regulation of mRNA splicing, via spliceosome / Regulation of gene expression in late stage (branching morphogenesis) pancreatic bud precursor cells / U4 snRNP / RUNX3 regulates NOTCH signaling / RHOBTB1 GTPase cycle / U2 snRNP / RNA Polymerase II Transcription Termination / SAGA complex / NOTCH4 Intracellular Domain Regulates Transcription / positive regulation of transcription by RNA polymerase III / U1 snRNP / ubiquitin-ubiquitin ligase activity / NOTCH3 Intracellular Domain Regulates Transcription / pattern recognition receptor activity / WD40-repeat domain binding / lipid biosynthetic process / Cajal body / positive regulation of neurogenesis / U2-type prespliceosome / cyclosporin A binding / nuclear androgen receptor binding / K63-linked polyubiquitin modification-dependent protein binding / positive regulation of G1/S transition of mitotic cell cycle / precatalytic spliceosome / retinoic acid receptor signaling pathway / positive regulation of transcription by RNA polymerase I / Notch-HLH transcription pathway / generation of catalytic spliceosome for second transesterification step / positive regulation of transforming growth factor beta receptor signaling pathway / Formation of paraxial mesoderm / spliceosomal complex assembly / mRNA Splicing - Minor Pathway / SMAD binding / regulation of RNA splicing / protein K63-linked ubiquitination / blastocyst development / mRNA 3'-splice site recognition / protein peptidyl-prolyl isomerization / protein localization to nucleus / spliceosomal tri-snRNP complex assembly Similarity search - Function | |||||||||
Biological species | Homo sapiens (human) | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 4.5 Å | |||||||||
Authors | Haselbach D / Komarov I / Agafonov D / Kastner B / Luehrmann R / Stark H | |||||||||
Citation | Journal: Cell / Year: 2018 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
Movie |
Movie viewer |
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Structure viewer | EM map: SurfViewMolmilJmol/JSmol |
Supplemental images |
-Downloads & links
-EMDB archive
Map data | emd_4240.map.gz | 245.3 MB | EMDB map data format | |
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Header (meta data) | emd-4240-v30.xml emd-4240.xml | 13.8 KB 13.8 KB | Display Display | EMDB header |
Images | emd_4240.png | 144.4 KB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-4240 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-4240 | HTTPS FTP |
-Validation report
Summary document | emd_4240_validation.pdf.gz | 242.5 KB | Display | EMDB validaton report |
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Full document | emd_4240_full_validation.pdf.gz | 241.7 KB | Display | |
Data in XML | emd_4240_validation.xml.gz | 7.3 KB | Display | |
Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-4240 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-4240 | HTTPS FTP |
-Related structure data
Related structure data | 6ff7MC 4233C 4234C 4235C 4236C 4237C 4238C 4239C 4247C 4248C 4249C 4250C 4251C 4252C 4253C 4254C 4255C 6ff4C C: citing same article (ref.) M: atomic model generated by this map |
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Similar structure data | |
EM raw data | EMPIAR-10160 (Title: Conformational Dynamics of human Bact spliceosome / Data size: 2.8 TB Data #1: aligned and summed micrograph stack of human Bact spliceosome [micrographs - single frame] Data #2: aligned, dose-weighted and summed micrograph stack of human Bact spliceosome [micrographs - single frame]) |
-Links
EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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Related items in Molecule of the Month |
-Map
File | Download / File: emd_4240.map.gz / Format: CCP4 / Size: 282.6 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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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
-Sample components
-Entire : human Bact spliceosome state 1 unmasked
Entire | Name: human Bact spliceosome state 1 unmasked |
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Components |
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-Supramolecule #1: human Bact spliceosome state 1 unmasked
Supramolecule | Name: human Bact spliceosome state 1 unmasked / type: complex / ID: 1 / Parent: 0 |
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Source (natural) | Organism: Homo sapiens (human) / Strain: HELA |
Molecular weight | Theoretical: 4.5 MDa |
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | single particle reconstruction |
Aggregation state | particle |
-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. |
-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 / Digitization - Sampling interval: 14.0 µm / 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: FIELD EMISSION GUN |
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 |
+Image processing
-Atomic model buiding 1
Refinement | Protocol: RIGID BODY FIT |
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Output model | PDB-6ff7: |