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Open data
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Basic information
| Entry | Database: EMDB / ID: EMD-12341 | |||||||||
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| Title | Akirin2 bound human proteasome | |||||||||
Map data | denoised map | |||||||||
Sample |
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Keywords | proteasome / nuclear import / TRANSPORT PROTEIN | |||||||||
| Function / homology | Function and homology informationproteasome localization / regulation of muscle cell differentiation / positive regulation of B cell activation / nuclear protein quality control by the ubiquitin-proteasome system / positive regulation of adaptive immune response / purine ribonucleoside triphosphate binding / embryo development ending in birth or egg hatching / positive regulation of innate immune response / Regulation of ornithine decarboxylase (ODC) / Proteasome assembly ...proteasome localization / regulation of muscle cell differentiation / positive regulation of B cell activation / nuclear protein quality control by the ubiquitin-proteasome system / positive regulation of adaptive immune response / purine ribonucleoside triphosphate binding / embryo development ending in birth or egg hatching / positive regulation of innate immune response / Regulation of ornithine decarboxylase (ODC) / Proteasome assembly / Cross-presentation of soluble exogenous antigens (endosomes) / proteasome core complex / Somitogenesis / myofibril / immune system process / NF-kappaB binding / proteasome endopeptidase complex / proteasome core complex, beta-subunit complex / proteasome assembly / threonine-type endopeptidase activity / proteasome core complex, alpha-subunit complex / transcription repressor complex / proteasome complex / proteolysis involved in protein catabolic process / sarcomere / Regulation of activated PAK-2p34 by proteasome mediated degradation / Autodegradation of Cdh1 by Cdh1:APC/C / transcription coregulator activity / APC/C:Cdc20 mediated degradation of Securin / Asymmetric localization of PCP proteins / Ubiquitin-dependent degradation of Cyclin D / SCF-beta-TrCP mediated degradation of Emi1 / NIK-->noncanonical NF-kB signaling / TNFR2 non-canonical NF-kB pathway / AUF1 (hnRNP D0) binds and destabilizes mRNA / Vpu mediated degradation of CD4 / Assembly of the pre-replicative complex / Ubiquitin-Mediated Degradation of Phosphorylated Cdc25A / negative regulation of inflammatory response to antigenic stimulus / Degradation of DVL / Dectin-1 mediated noncanonical NF-kB signaling / Cdc20:Phospho-APC/C mediated degradation of Cyclin A / P-body / lipopolysaccharide binding / Degradation of AXIN / Hh mutants are degraded by ERAD / Activation of NF-kappaB in B cells / Degradation of GLI1 by the proteasome / G2/M Checkpoints / Hedgehog ligand biogenesis / Defective CFTR causes cystic fibrosis / Autodegradation of the E3 ubiquitin ligase COP1 / GSK3B and BTRC:CUL1-mediated-degradation of NFE2L2 / Regulation of RUNX3 expression and activity / Negative regulation of NOTCH4 signaling / Hedgehog 'on' state / Vif-mediated degradation of APOBEC3G / APC/C:Cdh1 mediated degradation of Cdc20 and other APC/C:Cdh1 targeted proteins in late mitosis/early G1 / FBXL7 down-regulates AURKA during mitotic entry and in early mitosis / Degradation of GLI2 by the proteasome / GLI3 is processed to GLI3R by the proteasome / cerebral cortex development / MAPK6/MAPK4 signaling / Degradation of beta-catenin by the destruction complex / Oxygen-dependent proline hydroxylation of Hypoxia-inducible Factor Alpha / ABC-family proteins mediated transport / positive regulation of interleukin-6 production / CDK-mediated phosphorylation and removal of Cdc6 / CLEC7A (Dectin-1) signaling / SCF(Skp2)-mediated degradation of p27/p21 / response to virus / FCERI mediated NF-kB activation / nuclear matrix / Regulation of expression of SLITs and ROBOs / Regulation of PTEN stability and activity / Interleukin-1 signaling / Orc1 removal from chromatin / protein import into nucleus / Regulation of RAS by GAPs / Regulation of RUNX2 expression and activity / The role of GTSE1 in G2/M progression after G2 checkpoint / Separation of Sister Chromatids / KEAP1-NFE2L2 pathway / UCH proteinases / Downstream TCR signaling / peptidase activity / Antigen processing: Ubiquitination & Proteasome degradation / RUNX1 regulates transcription of genes involved in differentiation of HSCs / Neddylation / ER-Phagosome pathway / response to oxidative stress / regulation of inflammatory response / secretory granule lumen / endopeptidase activity / protein-macromolecule adaptor activity / response to lipopolysaccharide / ficolin-1-rich granule lumen / proteasome-mediated ubiquitin-dependent protein catabolic process / adaptive immune response / positive regulation of canonical NF-kappaB signal transduction Similarity search - Function | |||||||||
| Biological species | Homo sapiens (human) | |||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 3.2 Å | |||||||||
Authors | Singh K / Brunner H / Grishkovskaya I / de Almeida M / Hinterndorfer M / Zuber J / Haselbach D | |||||||||
Citation | Journal: Nature / Year: 2021Title: AKIRIN2 controls the nuclear import of proteasomes in vertebrates. Authors: Melanie de Almeida / Matthias Hinterndorfer / Hanna Brunner / Irina Grishkovskaya / Kashish Singh / Alexander Schleiffer / Julian Jude / Sumit Deswal / Robert Kalis / Milica Vunjak / Thomas ...Authors: Melanie de Almeida / Matthias Hinterndorfer / Hanna Brunner / Irina Grishkovskaya / Kashish Singh / Alexander Schleiffer / Julian Jude / Sumit Deswal / Robert Kalis / Milica Vunjak / Thomas Lendl / Richard Imre / Elisabeth Roitinger / Tobias Neumann / Susanne Kandolf / Michael Schutzbier / Karl Mechtler / Gijs A Versteeg / David Haselbach / Johannes Zuber / ![]() Abstract: Protein expression and turnover are controlled through a complex interplay of transcriptional, post-transcriptional and post-translational mechanisms to enable spatial and temporal regulation of ...Protein expression and turnover are controlled through a complex interplay of transcriptional, post-transcriptional and post-translational mechanisms to enable spatial and temporal regulation of cellular processes. To systematically elucidate such gene regulatory networks, we developed a CRISPR screening assay based on time-controlled Cas9 mutagenesis, intracellular immunostaining and fluorescence-activated cell sorting that enables the identification of regulatory factors independent of their effects on cellular fitness. We pioneered this approach by systematically probing the regulation of the transcription factor MYC, a master regulator of cell growth. Our screens uncover a highly conserved protein, AKIRIN2, that is essentially required for nuclear protein degradation. We found that AKIRIN2 forms homodimers that directly bind to fully assembled 20S proteasomes to mediate their nuclear import. During mitosis, proteasomes are excluded from condensing chromatin and re-imported into newly formed daughter nuclei in a highly dynamic, AKIRIN2-dependent process. Cells undergoing mitosis in the absence of AKIRIN2 become devoid of nuclear proteasomes, rapidly causing accumulation of MYC and other nuclear proteins. Collectively, our study reveals a dedicated pathway controlling the nuclear import of proteasomes in vertebrates and establishes a scalable approach to decipher regulators in essential cellular processes. | |||||||||
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Structure visualization
| Movie |
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| Structure viewer | EM map: SurfView Molmil Jmol/JSmol |
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Downloads & links
-EMDB archive
| Map data | emd_12341.map.gz | 150.9 MB | EMDB map data format | |
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| Header (meta data) | emd-12341-v30.xml emd-12341.xml | 35 KB 35 KB | Display Display | EMDB header |
| Images | emd_12341.png | 72.5 KB | ||
| Filedesc metadata | emd-12341.cif.gz | 9.1 KB | ||
| Others | emd_12341_additional_1.map.gz | 141.5 MB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-12341 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-12341 | HTTPS FTP |
-Validation report
| Summary document | emd_12341_validation.pdf.gz | 359 KB | Display | EMDB validaton report |
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| Full document | emd_12341_full_validation.pdf.gz | 358.5 KB | Display | |
| Data in XML | emd_12341_validation.xml.gz | 6.9 KB | Display | |
| Data in CIF | emd_12341_validation.cif.gz | 8 KB | Display | |
| Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-12341 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-12341 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 7nhtMC C: citing same article ( M: atomic model generated by this map |
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| Similar structure data | |
| EM raw data | EMPIAR-10752 (Title: Single particle cryo EM Data of a human Akirin2 proteasome complexData size: 2.0 TB Data #1: Unaligned Multiframe micrographs of Akirin2 bound to the human proteasome [micrographs - multiframe] Data #2: Motion corrected files dose weighted and summed as well as without dose weigthening [micrographs - single frame] Data #3: Extracted particles of an Akirin2 bound proteasome [picked particles - single frame - processed]) |
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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_12341.map.gz / Format: CCP4 / Size: 178 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Annotation | denoised map | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Voxel size | X=Y=Z: 1.06 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Density |
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| Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Details | EMDB XML:
CCP4 map header:
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-Supplemental data
-Additional map: unsharpend map
| File | emd_12341_additional_1.map | ||||||||||||
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| Annotation | unsharpend map | ||||||||||||
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| Density Histograms |
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Sample components
+Entire : Akirin2 bound to 20S proteasome
+Supramolecule #1: Akirin2 bound to 20S proteasome
+Supramolecule #2: 20S proteasome
+Supramolecule #3: Akirin2
+Macromolecule #1: Proteasome subunit alpha type-2
+Macromolecule #2: Proteasome subunit alpha type-4
+Macromolecule #3: Proteasome subunit alpha type-7
+Macromolecule #4: Proteasome subunit alpha type-5
+Macromolecule #5: Proteasome subunit alpha type-1
+Macromolecule #6: Proteasome subunit alpha type-3
+Macromolecule #7: Proteasome subunit alpha type-6
+Macromolecule #8: Proteasome subunit beta type-7
+Macromolecule #9: Proteasome subunit beta type-3
+Macromolecule #10: Proteasome subunit beta type-2
+Macromolecule #11: Proteasome subunit beta type-5
+Macromolecule #12: Proteasome subunit beta type-1
+Macromolecule #13: Proteasome subunit beta type-4
+Macromolecule #14: Proteasome subunit beta type-6
+Macromolecule #15: Akirin-2
+Macromolecule #16: POTASSIUM ION
-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: 6.5 Component:
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| Grid | Model: Quantifoil R3.5/1 / Material: COPPER / Mesh: 200 / Support film - Material: CARBON / Support film - topology: CONTINUOUS / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 60 sec. | ||||||||||||||||||
| Vitrification | Cryogen name: ETHANE |
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Electron microscopy
| Microscope | FEI TITAN KRIOS |
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| Specialist optics | Energy filter - Name: GIF Bioquantum / Energy filter - Slit width: 20 eV |
| Image recording | Film or detector model: GATAN K3 (6k x 4k) / Number grids imaged: 1 / Number real images: 4595 / Average exposure time: 1.0 sec. / Average electron dose: 33.0 e/Å2 |
| Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
| Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal magnification: 81000 |
| 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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About Yorodumi



Keywords
Homo sapiens (human)
Authors
Citation

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