+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-32317 | |||||||||
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Title | The cryo-EM structure of human pre-C*-I complex | |||||||||
Map data | The cryo-EM map of human pre-C*-I complex | |||||||||
Sample |
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Function / homology | Function and homology information exon-exon junction subcomplex mago-y14 / negative regulation of selenocysteine incorporation / regulation of nuclear-transcribed mRNA catabolic process, nonsense-mediated decay / cellular response to selenite ion / spliceosomal complex disassembly / exon-exon junction complex / selenocysteine insertion sequence binding / post-mRNA release spliceosomal complex / negative regulation of proteasomal protein catabolic process / regulation of retinoic acid receptor signaling pathway ...exon-exon junction subcomplex mago-y14 / negative regulation of selenocysteine incorporation / regulation of nuclear-transcribed mRNA catabolic process, nonsense-mediated decay / cellular response to selenite ion / spliceosomal complex disassembly / exon-exon junction complex / selenocysteine insertion sequence binding / post-mRNA release spliceosomal complex / negative regulation of proteasomal protein catabolic process / regulation of retinoic acid receptor signaling pathway / intracellular mRNA localization / regulation of translation at postsynapse, modulating synaptic transmission / 3'-5' RNA helicase activity / snRNP binding / U2 snRNP binding / U7 snRNA binding / histone pre-mRNA DCP binding / generation of catalytic spliceosome for first transesterification step / negative regulation of excitatory postsynaptic potential / U7 snRNP / regulation of vitamin D receptor signaling pathway / Z-decay: degradation of maternal mRNAs by zygotically expressed factors / histone pre-mRNA 3'end processing complex / regulation of mRNA processing / SLBP independent Processing of Histone Pre-mRNAs / SLBP Dependent Processing of Replication-Dependent Histone Pre-mRNAs / Deadenylation of mRNA / embryonic brain development / protein methylation / U12-type spliceosomal complex / methylosome / nuclear retinoic acid receptor binding / Prp19 complex / 7-methylguanosine cap hypermethylation / positive regulation of androgen receptor activity / poly(A) binding / U1 snRNP binding / M-decay: degradation of maternal mRNAs by maternally stored factors / pICln-Sm protein complex / mRNA 3'-end processing / pre-mRNA binding / ATP-dependent activity, acting on RNA / U2-type catalytic step 1 spliceosome / embryonic cranial skeleton morphogenesis / RNA splicing, via transesterification reactions / small nuclear ribonucleoprotein complex / sno(s)RNA-containing ribonucleoprotein complex / P granule / SMN-Sm protein complex / regulation of mRNA splicing, via spliceosome / C2H2 zinc finger domain binding / spliceosomal tri-snRNP complex / telomerase holoenzyme complex / mRNA cis splicing, via spliceosome / U2-type spliceosomal complex / positive regulation by host of viral transcription / telomerase RNA binding / U2-type precatalytic spliceosome / commitment complex / positive regulation of mRNA splicing, via spliceosome / positive regulation of vitamin D receptor signaling pathway / Transport of Mature mRNA derived from an Intron-Containing Transcript / U2-type prespliceosome assembly / U2-type catalytic step 2 spliceosome / nuclear vitamin D receptor binding / U4 snRNP / Notch binding / Regulation of gene expression in late stage (branching morphogenesis) pancreatic bud precursor cells / RUNX3 regulates NOTCH signaling / U2 snRNP / RNA Polymerase II Transcription Termination / NOTCH4 Intracellular Domain Regulates Transcription / U1 snRNP / nuclear-transcribed mRNA catabolic process, nonsense-mediated decay / ubiquitin-ubiquitin ligase activity / WD40-repeat domain binding / NOTCH3 Intracellular Domain Regulates Transcription / positive regulation of neurogenesis / exploration behavior / U2-type prespliceosome / K63-linked polyubiquitin modification-dependent protein binding / lipid biosynthetic process / nuclear androgen receptor binding / cyclosporin A binding / precatalytic spliceosome / spliceosomal complex assembly / Notch-HLH transcription pathway / Formation of paraxial mesoderm / regulation of alternative mRNA splicing, via spliceosome / mRNA Splicing - Minor Pathway / positive regulation of transforming growth factor beta receptor signaling pathway / SMAD binding / mitotic G2 DNA damage checkpoint signaling / protein K63-linked ubiquitination / associative learning / blastocyst development / protein localization to nucleus / spliceosomal tri-snRNP complex assembly / intrinsic apoptotic signaling pathway in response to DNA damage by p53 class mediator / retinoic acid receptor signaling pathway Similarity search - Function | |||||||||
Biological species | Homo sapiens (human) / human (human) / unidentified adenovirus / Human (human) | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.6 Å | |||||||||
Authors | Zhan X / Lu Y / Shi Y | |||||||||
Funding support | China, 1 items
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Citation | Journal: Mol Cell / Year: 2022 Title: Mechanism of exon ligation by human spliceosome. Authors: Xiechao Zhan / Yichen Lu / Xiaofeng Zhang / Chuangye Yan / Yigong Shi / Abstract: Pre-mRNA splicing involves two sequential reactions: branching and exon ligation. The C complex after branching undergoes remodeling to become the C complex, which executes exon ligation. Here, we ...Pre-mRNA splicing involves two sequential reactions: branching and exon ligation. The C complex after branching undergoes remodeling to become the C complex, which executes exon ligation. Here, we report cryo-EM structures of two intermediate human spliceosomal complexes, pre-C-I and pre-C-II, both at 3.6 Å. In both structures, the 3' splice site is already docked into the active site, the ensuing 3' exon sequences are anchored on PRP8, and the step II factor FAM192A contacts the duplex between U2 snRNA and the branch site. In the transition of pre-C-I to pre-C-II, the step II factors Cactin, FAM32A, PRKRIP1, and SLU7 are recruited. Notably, the RNA helicase PRP22 is positioned quite differently in the pre-C-I, pre-C-II, and C complexes, suggesting a role in 3' exon binding and proofreading. Together with information on human C and C complexes, our studies recapitulate a molecular choreography of the C-to-C transition, revealing mechanistic insights into exon ligation. | |||||||||
History |
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-Structure visualization
Supplemental images |
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-Downloads & links
-EMDB archive
Map data | emd_32317.map.gz | 230.2 MB | EMDB map data format | |
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Header (meta data) | emd-32317-v30.xml emd-32317.xml | 59 KB 59 KB | Display Display | EMDB header |
Images | emd_32317.png | 62.7 KB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-32317 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-32317 | HTTPS FTP |
-Related structure data
Related structure data | 7w59MC 7w5aC 7w5bC M: atomic model generated by this map C: citing same article (ref.) |
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Similar structure data | Similarity search - Function & homologyF&H Search |
-Links
EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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Related items in Molecule of the Month |
-Map
File | Download / File: emd_32317.map.gz / Format: CCP4 / Size: 244.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||
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Annotation | The cryo-EM map of human pre-C*-I complex | ||||||||||||||||||||
Voxel size | X=Y=Z: 1.338 Å | ||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Sample components
+Entire : Human pre-C*-I complex
+Supramolecule #1: Human pre-C*-I complex
+Macromolecule #1: Pre-mRNA-processing-splicing factor 8
+Macromolecule #2: 116 kDa U5 small nuclear ribonucleoprotein component
+Macromolecule #3: U5 small nuclear ribonucleoprotein 40 kDa protein
+Macromolecule #6: Crooked neck-like protein 1
+Macromolecule #7: Cell division cycle 5-like protein
+Macromolecule #8: Pre-mRNA-splicing factor SYF2
+Macromolecule #9: Protein BUD31 homolog
+Macromolecule #10: Pre-mRNA-splicing factor RBM22
+Macromolecule #11: Spliceosome-associated protein CWC15 homolog
+Macromolecule #12: SNW domain-containing protein 1
+Macromolecule #13: Peptidyl-prolyl cis-trans isomerase-like 1
+Macromolecule #14: Pleiotropic regulator 1
+Macromolecule #15: Serine/arginine repetitive matrix protein 2
+Macromolecule #16: Pre-mRNA-splicing factor CWC22 homolog
+Macromolecule #17: Pre-mRNA-processing factor 17
+Macromolecule #21: Small nuclear ribonucleoprotein-associated proteins B and B'
+Macromolecule #22: PSME3-interacting protein
+Macromolecule #23: Pre-mRNA-splicing factor SYF1
+Macromolecule #24: Peptidyl-prolyl cis-trans isomerase E
+Macromolecule #25: ATP-dependent RNA helicase DHX8
+Macromolecule #26: Small nuclear ribonucleoprotein Sm D3
+Macromolecule #27: Small nuclear ribonucleoprotein Sm D1
+Macromolecule #28: Small nuclear ribonucleoprotein Sm D2
+Macromolecule #29: Small nuclear ribonucleoprotein F
+Macromolecule #30: Small nuclear ribonucleoprotein E
+Macromolecule #31: Small nuclear ribonucleoprotein G
+Macromolecule #32: Protein mago nashi homolog
+Macromolecule #33: RNA-binding protein 8A
+Macromolecule #34: Eukaryotic initiation factor 4A-III
+Macromolecule #35: Protein CASC3
+Macromolecule #36: RNA helicase aquarius
+Macromolecule #37: U2 small nuclear ribonucleoprotein A'
+Macromolecule #38: U2 small nuclear ribonucleoprotein B''
+Macromolecule #39: Pre-mRNA-processing factor 19
+Macromolecule #40: Pre-mRNA-splicing factor SPF27
+Macromolecule #4: pre-mRNA
+Macromolecule #5: pre-mRNA
+Macromolecule #18: U5 snRNA
+Macromolecule #19: U6 snRNA
+Macromolecule #20: U2 snRNA
+Macromolecule #41: INOSITOL HEXAKISPHOSPHATE
+Macromolecule #42: GUANOSINE-5'-TRIPHOSPHATE
+Macromolecule #43: MAGNESIUM ION
+Macromolecule #44: ZINC ION
+Macromolecule #45: ADENOSINE-5'-TRIPHOSPHATE
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation
Buffer | pH: 7.9 |
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Vitrification | Cryogen name: ETHANE |
-Electron microscopy
Microscope | FEI TITAN KRIOS |
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Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy / Nominal defocus max: 2.5 µm / Nominal defocus min: 1.2 µm |
Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: SUPER-RESOLUTION / Average electron dose: 50.0 e/Å2 |
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
-Image processing
Initial angle assignment | Type: MAXIMUM LIKELIHOOD |
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Final angle assignment | Type: MAXIMUM LIKELIHOOD |
Final reconstruction | Resolution.type: BY AUTHOR / Resolution: 3.6 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 192274 |