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Open data
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Basic information
| Entry | ![]() | |||||||||
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| Title | The cryo-EM structure of human C* complex | |||||||||
Map data | The cryo-EM map of human C* complex | |||||||||
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Keywords | spliceosome / C* complex / RNA splicing / PRP22 / exon ligation / SPLICING | |||||||||
| Function / homology | Function and homology informationsecond spliceosomal transesterification activity / 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 / selenocysteine insertion sequence binding / exon-exon junction complex / pre-mRNA 3'-splice site binding / regulation of translation at postsynapse, modulating synaptic transmission / regulation of retinoic acid receptor signaling pathway ...second spliceosomal transesterification activity / 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 / selenocysteine insertion sequence binding / exon-exon junction complex / pre-mRNA 3'-splice site binding / regulation of translation at postsynapse, modulating synaptic transmission / regulation of retinoic acid receptor signaling pathway / granulocyte differentiation / post-mRNA release spliceosomal complex / renal system process / intracellular mRNA localization / 3'-5' RNA helicase activity / U2 snRNP binding / U7 snRNA binding / histone pre-mRNA DCP binding / negative regulation of toll-like receptor signaling pathway / generation of catalytic spliceosome for first transesterification step / U7 snRNP / Z-decay: degradation of maternal mRNAs by zygotically expressed factors / cis assembly of pre-catalytic spliceosome / histone pre-mRNA 3'end processing complex / regulation of mRNA processing / negative regulation of excitatory postsynaptic potential / regulation of vitamin D receptor signaling pathway / negative regulation of lipopolysaccharide-mediated signaling pathway / SLBP independent Processing of Histone Pre-mRNAs / SLBP Dependent Processing of Replication-Dependent Histone Pre-mRNAs / negative regulation of interleukin-8 production / spliceosome conformational change to release U4 (or U4atac) and U1 (or U11) / Deadenylation of mRNA / nuclear retinoic acid receptor binding / embryonic brain development / oocyte development / embryonic cranial skeleton morphogenesis / protein methylation / alternative mRNA splicing, via spliceosome / U12-type spliceosomal complex / poly(A) binding / 7-methylguanosine cap hypermethylation / M-decay: degradation of maternal mRNAs by maternally stored factors / negative regulation of interferon-beta production / U1 snRNP binding / U2-type catalytic step 1 spliceosome / C2H2 zinc finger domain binding / RNA splicing, via transesterification reactions / methylosome / pre-mRNA binding / ATP-dependent activity, acting on RNA / pICln-Sm protein complex / regulation of mRNA splicing, via spliceosome / positive regulation of mRNA splicing, via spliceosome / mRNA 3'-end processing / snRNP binding / sno(s)RNA-containing ribonucleoprotein complex / small nuclear ribonucleoprotein complex / Notch binding / host-mediated activation of viral transcription / SMN-Sm protein complex / spliceosomal tri-snRNP complex / 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 / U2-type prespliceosome assembly / positive regulation of alpha-beta T cell differentiation / 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 / U2 snRNP / RNA Polymerase II Transcription Termination / U1 snRNP / nuclear-transcribed mRNA catabolic process, nonsense-mediated decay / U4 snRNP / NOTCH3 Intracellular Domain Regulates Transcription / positive regulation of neurogenesis / negative regulation of type I interferon-mediated signaling pathway / U2-type prespliceosome / inner cell mass cell proliferation / protein peptidyl-prolyl isomerization / ubiquitin-ubiquitin ligase activity / K63-linked polyubiquitin modification-dependent protein binding / nuclear androgen receptor binding / cyclosporin A binding / WD40-repeat domain binding / precatalytic spliceosome / : / Notch-HLH transcription pathway / lipid biosynthetic process / regulation of alternative mRNA splicing, via spliceosome / Formation of paraxial mesoderm Similarity search - Function | |||||||||
| Biological species | Homo sapiens (human) / unidentified adenovirus | |||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 4.3 Å | |||||||||
Authors | Zhan X / Lu Y | |||||||||
| Funding support | China, 1 items
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Citation | Journal: Mol Cell / Year: 2022Title: 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. | |||||||||
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Structure visualization
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Downloads & links
-EMDB archive
| Map data | emd_32321.map.gz | 230.3 MB | EMDB map data format | |
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| Header (meta data) | emd-32321-v30.xml emd-32321.xml | 73.8 KB 73.8 KB | Display Display | EMDB header |
| Images | emd_32321.png | 65.6 KB | ||
| Filedesc metadata | emd-32321.cif.gz | 22.8 KB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-32321 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-32321 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 7w5bMC ![]() 7w59C ![]() 7w5aC M: atomic model generated by this map C: citing same article ( |
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| Similar structure data | Similarity search - Function & homology F&H Search |
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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_32321.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 C* complex | ||||||||||||||||||||||||||||||||||||
| Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
| 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
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Sample components
+Entire : Human pre-C*-I complex
+Supramolecule #1: Human pre-C*-I complex
+Macromolecule #1: Pre-mRNA-processing-splicing factor 8
+Macromolecule #3: 116 kDa U5 small nuclear ribonucleoprotein component
+Macromolecule #4: U5 small nuclear ribonucleoprotein 200 kDa helicase
+Macromolecule #5: U5 small nuclear ribonucleoprotein 40 kDa protein
+Macromolecule #10: Pre-mRNA-splicing factor SYF1
+Macromolecule #11: Crooked neck-like protein 1
+Macromolecule #12: Pre-mRNA-splicing factor SPF27
+Macromolecule #13: Cell division cycle 5-like protein
+Macromolecule #14: Pre-mRNA-splicing factor SYF2
+Macromolecule #15: Protein BUD31 homolog
+Macromolecule #16: Pre-mRNA-splicing factor RBM22
+Macromolecule #17: Spliceosome-associated protein CWC15 homolog
+Macromolecule #18: RNA helicase aquarius
+Macromolecule #19: SNW domain-containing protein 1
+Macromolecule #20: Peptidyl-prolyl cis-trans isomerase-like 1
+Macromolecule #21: Pleiotropic regulator 1
+Macromolecule #22: Serine/arginine repetitive matrix protein 2
+Macromolecule #23: Pre-mRNA-splicing factor CWC22 homolog
+Macromolecule #24: Pre-mRNA-processing factor 17
+Macromolecule #25: ATP-dependent RNA helicase DHX8
+Macromolecule #26: Cactin
+Macromolecule #27: PRKR-interacting protein 1
+Macromolecule #28: Protein FAM32A
+Macromolecule #29: Small nuclear ribonucleoprotein-associated proteins B and B'
+Macromolecule #30: Peptidyl-prolyl cis-trans isomerase E
+Macromolecule #31: Small nuclear ribonucleoprotein Sm D3
+Macromolecule #32: Small nuclear ribonucleoprotein Sm D1
+Macromolecule #33: Small nuclear ribonucleoprotein Sm D2
+Macromolecule #34: Small nuclear ribonucleoprotein F
+Macromolecule #35: Small nuclear ribonucleoprotein E
+Macromolecule #36: Small nuclear ribonucleoprotein G
+Macromolecule #37: Pre-mRNA-processing factor 19
+Macromolecule #38: U2 small nuclear ribonucleoprotein A'
+Macromolecule #39: U2 small nuclear ribonucleoprotein B''
+Macromolecule #40: Pre-mRNA-splicing factor SLU7
+Macromolecule #41: Protein mago nashi homolog
+Macromolecule #42: RNA-binding protein 8A
+Macromolecule #43: Eukaryotic initiation factor 4A-III
+Macromolecule #44: Protein CASC3
+Macromolecule #45: NF-kappa-B-activating protein
+Macromolecule #2: U5 snRNA
+Macromolecule #6: U6 snRNA
+Macromolecule #7: Pre-mRNA
+Macromolecule #8: Pre-mRNA
+Macromolecule #9: U2 snRNA
+Macromolecule #46: INOSITOL HEXAKISPHOSPHATE
+Macromolecule #47: GUANOSINE-5'-TRIPHOSPHATE
+Macromolecule #48: MAGNESIUM ION
+Macromolecule #49: ZINC ION
+Macromolecule #50: ADENOSINE-5'-TRIPHOSPHATE
-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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| Vitrification | Cryogen name: ETHANE |
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Electron microscopy
| Microscope | FEI TITAN KRIOS |
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| Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: SUPER-RESOLUTION / Average electron dose: 50.0 e/Å2 |
| Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
| Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.5 µm / Nominal defocus min: 1.2 µm |
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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About Yorodumi




Keywords
Homo sapiens (human)
unidentified adenovirus
Authors
China, 1 items
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Processing
FIELD EMISSION GUN
