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| Title | Human PA200-20S proteasome with MG-132 | |||||||||
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Keywords | proteolysis / protein degradation / complex / inhibitor / MG-132 / MG132 / HYDROLASE-INHIBITOR complex | |||||||||
| Function / homology | Function and homology informationspermatoproteasome complex / sperm DNA condensation / : / purine ribonucleoside triphosphate binding / sperm glycocalyx / Antigen processing: Ub, ATP-independent proteasomal degradation / perinuclear theca / Regulation of ornithine decarboxylase (ODC) / Proteasome assembly / proteasome core complex ...spermatoproteasome complex / sperm DNA condensation / : / purine ribonucleoside triphosphate binding / sperm glycocalyx / Antigen processing: Ub, ATP-independent proteasomal degradation / perinuclear theca / Regulation of ornithine decarboxylase (ODC) / Proteasome assembly / proteasome core complex / Cross-presentation of soluble exogenous antigens (endosomes) / peptidase activator activity / Somitogenesis / sperm head-tail coupling apparatus / proteasome binding / myofibril / proteasomal ubiquitin-independent protein catabolic process / immune system process / NF-kappaB binding / proteasome endopeptidase complex / proteasome core complex, beta-subunit complex / threonine-type endopeptidase activity / proteasome assembly / proteasome core complex, alpha-subunit complex / ciliary tip / proteasome complex / : / sarcomere / sperm end piece / Regulation of activated PAK-2p34 by proteasome mediated degradation / Autodegradation of Cdh1 by Cdh1:APC/C / APC/C:Cdc20 mediated degradation of Securin / Asymmetric localization of PCP proteins / centriole / 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 / negative regulation of inflammatory response to antigenic stimulus / Assembly of the pre-replicative complex / P-body / Vpu mediated degradation of CD4 / Cdc20:Phospho-APC/C mediated degradation of Cyclin A / Degradation of DVL / Dectin-1 mediated noncanonical NF-kB signaling / Degradation of CRY and PER proteins / lipopolysaccharide binding / Degradation of AXIN / Hh mutants are degraded by ERAD / Activation of NF-kappaB in B cells / G2/M Checkpoints / Hedgehog ligand biogenesis / Degradation of GLI1 by the proteasome / Defective CFTR causes cystic fibrosis / Autodegradation of the E3 ubiquitin ligase COP1 / Regulation of RUNX3 expression and activity / GSK3B and BTRC:CUL1-mediated-degradation of NFE2L2 / Negative regulation of NOTCH4 signaling / Hedgehog 'on' state / APC/C:Cdh1 mediated degradation of Cdc20 and other APC/C:Cdh1 targeted proteins in late mitosis/early G1 / Vif-mediated degradation of APOBEC3G / FBXL7 down-regulates AURKA during mitotic entry and in early mitosis / Ubiquitin-Mediated Degradation of Phosphorylated Cdc25A / Degradation of CDH1 / Degradation of GLI2 by the proteasome / GLI3 is processed to GLI3R by the proteasome / MAPK6/MAPK4 signaling / Degradation of beta-catenin by the destruction complex / ABC-family proteins mediated transport / Oxygen-dependent proline hydroxylation of Hypoxia-inducible Factor Alpha / 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 / Regulation of expression of SLITs and ROBOs / nuclear matrix / Regulation of PTEN stability and activity / Interleukin-1 signaling / Orc1 removal from chromatin / 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 / sperm principal piece / peptidase activity / Antigen processing: Ubiquitination & Proteasome degradation / RUNX1 regulates transcription of genes involved in differentiation of HSCs / ER-Phagosome pathway / Neddylation / sperm midpiece / regulation of inflammatory response / response to oxidative stress / secretory granule lumen / endopeptidase activity / ficolin-1-rich granule lumen Similarity search - Function | |||||||||
| Biological species | Homo sapiens (human) | |||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 3.1 Å | |||||||||
Authors | Zhao J | |||||||||
| Funding support | 1 items
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Citation | Journal: Proc Natl Acad Sci U S A / Year: 2022Title: Structural insights into the human PA28-20S proteasome enabled by efficient tagging and purification of endogenous proteins. Authors: Jianhua Zhao / Suraj Makhija / Chenyu Zhou / Hanxiao Zhang / YongQiang Wang / Monita Muralidharan / Bo Huang / Yifan Cheng / ![]() Abstract: The ability to produce folded and functional proteins is a necessity for structural biology and many other biological sciences. This task is particularly challenging for numerous biomedically ...The ability to produce folded and functional proteins is a necessity for structural biology and many other biological sciences. This task is particularly challenging for numerous biomedically important targets in human cells, including membrane proteins and large macromolecular assemblies, hampering mechanistic studies and drug development efforts. Here we describe a method combining CRISPR-Cas gene editing and fluorescence-activated cell sorting to rapidly tag and purify endogenous proteins in HEK cells for structural characterization. We applied this approach to study the human proteasome from HEK cells and rapidly determined cryogenic electron microscopy structures of major proteasomal complexes, including a high-resolution structure of intact human PA28αβ-20S. Our structures reveal that PA28 with a subunit stoichiometry of 3α/4β engages tightly with the 20S proteasome. Addition of a hydrophilic peptide shows that polypeptides entering through PA28 are held in the antechamber of 20S prior to degradation in the proteolytic chamber. This study provides critical insights into an important proteasome complex and demonstrates key methodologies for the tagging of proteins from endogenous sources. | |||||||||
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Structure visualization
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Downloads & links
-EMDB archive
| Map data | emd_27015.map.gz | 8.9 MB | EMDB map data format | |
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| Header (meta data) | emd-27015-v30.xml emd-27015.xml | 32.3 KB 32.3 KB | Display Display | EMDB header |
| FSC (resolution estimation) | emd_27015_fsc.xml | 23 KB | Display | FSC data file |
| Images | emd_27015.png | 112.7 KB | ||
| Filedesc metadata | emd-27015.cif.gz | 9 KB | ||
| Others | emd_27015_half_map_1.map.gz emd_27015_half_map_2.map.gz | 474.9 MB 474.9 MB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-27015 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-27015 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 8cvsMC ![]() 7nanC ![]() 7naoC ![]() 7napC ![]() 7naqC ![]() 8cvrC ![]() 8cvtC ![]() 8cxbC C: citing same article ( M: atomic model generated by this map |
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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_27015.map.gz / Format: CCP4 / Size: 103 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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| 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:
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-Supplemental data
-Half map: #1
| File | emd_27015_half_map_1.map | ||||||||||||
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-Half map: #2
| File | emd_27015_half_map_2.map | ||||||||||||
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Sample components
+Entire : PA200-20S proteasome
+Supramolecule #1: PA200-20S proteasome
+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: Proteasome activator complex subunit 4
+Macromolecule #16: N-[(benzyloxy)carbonyl]-L-leucyl-N-[(2S)-4-methyl-1-oxopentan-2-y...
+Macromolecule #17: INOSITOL HEXAKISPHOSPHATE
-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: 7.5 |
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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 K3 (6k x 4k) / Average electron dose: 30.0 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: 2.0 µm / Nominal defocus min: 1.0 µm |
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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About Yorodumi




Keywords
Homo sapiens (human)
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Processing
FIELD EMISSION GUN

