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Basic information
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| Title | Cryo-EM structure of CRL2-FEM1B bound with TOM20(tetramer) | |||||||||
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Keywords | ubiquitination E3 ligase / Cryo-EM / PROTEIN BINDING | |||||||||
| Function / homology | Function and homology informationtRNA import into mitochondrion / TOM complex / regulation of ubiquitin-protein transferase activity / mitochondrion targeting sequence binding / epithelial cell maturation involved in prostate gland development / mitochondrial outer membrane translocase complex / protein insertion into mitochondrial outer membrane / mitochondria-associated endoplasmic reticulum membrane contact site / protein-transporting ATPase activity / migrasome ...tRNA import into mitochondrion / TOM complex / regulation of ubiquitin-protein transferase activity / mitochondrion targeting sequence binding / epithelial cell maturation involved in prostate gland development / mitochondrial outer membrane translocase complex / protein insertion into mitochondrial outer membrane / mitochondria-associated endoplasmic reticulum membrane contact site / protein-transporting ATPase activity / migrasome / branching involved in prostate gland morphogenesis / cullin-RING-type E3 NEDD8 transferase / NEDD8 transferase activity / cullin-RING ubiquitin ligase complex / Cul7-RING ubiquitin ligase complex / ubiquitin-dependent protein catabolic process via the C-end degron rule pathway / regulation of DNA damage checkpoint / cellular response to chemical stress / Loss of Function of FBXW7 in Cancer and NOTCH1 Signaling / Mitochondrial protein import / target-directed miRNA degradation / elongin complex / positive regulation of protein autoubiquitination / RNA polymerase II transcription initiation surveillance / regulation of extrinsic apoptotic signaling pathway via death domain receptors / protein neddylation / death receptor binding / NEDD8 ligase activity / VCB complex / negative regulation of response to oxidative stress / Cul5-RING ubiquitin ligase complex / SCF ubiquitin ligase complex / : / ubiquitin-ubiquitin ligase activity / negative regulation of type I interferon production / SCF-dependent proteasomal ubiquitin-dependent protein catabolic process / Cul2-RING ubiquitin ligase complex / Cul3-RING ubiquitin ligase complex / Cul4A-RING E3 ubiquitin ligase complex / Cul4-RING E3 ubiquitin ligase complex / negative regulation of mitophagy / Prolactin receptor signaling / Cul4B-RING E3 ubiquitin ligase complex / ubiquitin ligase complex scaffold activity / protein import into mitochondrial matrix / cullin family protein binding / Pausing and recovery of Tat-mediated HIV elongation / Tat-mediated HIV elongation arrest and recovery / HIV elongation arrest and recovery / Pausing and recovery of HIV elongation / protein monoubiquitination / ubiquitin ligase complex / Tat-mediated elongation of the HIV-1 transcript / Formation of HIV-1 elongation complex containing HIV-1 Tat / ubiquitin-like ligase-substrate adaptor activity / protein K48-linked ubiquitination / Formation of HIV elongation complex in the absence of HIV Tat / RNA Polymerase II Transcription Elongation / Formation of RNA Pol II elongation complex / Nuclear events stimulated by ALK signaling in cancer / sperm midpiece / transcription-coupled nucleotide-excision repair / RNA Polymerase II Pre-transcription Events / positive regulation of TORC1 signaling / regulation of cellular response to insulin stimulus / negative regulation of insulin receptor signaling pathway / intrinsic apoptotic signaling pathway / post-translational protein modification / T cell activation / Regulation of BACH1 activity / transcription corepressor binding / cell periphery / PINK1-PRKN Mediated Mitophagy / TP53 Regulates Transcription of DNA Repair Genes / cellular response to amino acid stimulus / transcription initiation at RNA polymerase II promoter / transcription elongation by RNA polymerase II / Degradation of DVL / Degradation of GLI1 by the proteasome / G1/S transition of mitotic cell cycle / negative regulation of canonical Wnt signaling pathway / GSK3B and BTRC:CUL1-mediated-degradation of NFE2L2 / Negative regulation of NOTCH4 signaling / Recognition of DNA damage by PCNA-containing replication complex / Hedgehog 'on' state / Vif-mediated degradation of APOBEC3G / 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 / RING-type E3 ubiquitin transferase / Inactivation of CSF3 (G-CSF) signaling / Degradation of beta-catenin by the destruction complex / DNA Damage Recognition in GG-NER / Oxygen-dependent proline hydroxylation of Hypoxia-inducible Factor Alpha / Evasion by RSV of host interferon responses / NOTCH1 Intracellular Domain Regulates Transcription / Constitutive Signaling by NOTCH1 PEST Domain Mutants / Constitutive Signaling by NOTCH1 HD+PEST Domain Mutants / Dual Incision in GG-NER / Transcription-Coupled Nucleotide Excision Repair (TC-NER) Similarity search - Function | |||||||||
| Biological species | Homo sapiens (human) | |||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 4.08 Å | |||||||||
Authors | Zhao S / Xu C | |||||||||
| Funding support | China, 1 items
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Citation | Journal: Nat Chem Biol / Year: 2026Title: TOM20-driven E3 ligase recruitment regulates mitochondrial dynamics through PLD6. Authors: Anat Raiff / Shidong Zhao / Aizat Bekturova / Colin Zenge / Shir Mazor / Xinyan Chen / Wenwen Ru / Yaara Makaros / Tslil Ast / Alban Ordureau / Chao Xu / Itay Koren / ![]() Abstract: Mitochondrial homeostasis is maintained through complex regulatory mechanisms, including the balance of mitochondrial dynamics involving fusion and fission processes. A central player in this ...Mitochondrial homeostasis is maintained through complex regulatory mechanisms, including the balance of mitochondrial dynamics involving fusion and fission processes. A central player in this regulation is the ubiquitin-proteasome system (UPS), which controls the degradation of pivotal mitochondrial proteins. In this study, we identified cullin-RING E3 ligase 2 (CRL2) and its substrate receptor, FEM1B, as critical regulators of mitochondrial dynamics. Through proteomic analysis, we demonstrate here that FEM1B controls the turnover of PLD6, a key regulator of mitochondrial dynamics. Using structural and biochemical approaches, we show that FEM1B physically interacts with PLD6 and that this interaction is facilitated by the direct association of FEM1B with the mitochondrial import receptor TOM20. Ablation of FEM1B or disruption of the FEM1B-TOM20 interaction impairs PLD6 degradation and induces mitochondrial defects, phenocopying PLD6 overexpression. These findings underscore the importance of FEM1B in maintaining mitochondrial morphology and provide further mechanistic insights into how the UPS regulates mitochondrial homeostasis. | |||||||||
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Structure visualization
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Downloads & links
-EMDB archive
| Map data | emd_61198.map.gz | 945.6 MB | EMDB map data format | |
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| Header (meta data) | emd-61198-v30.xml emd-61198.xml | 27.6 KB 27.6 KB | Display Display | EMDB header |
| Images | emd_61198.png | 137.1 KB | ||
| Filedesc metadata | emd-61198.cif.gz | 7.9 KB | ||
| Others | emd_61198_half_map_1.map.gz emd_61198_half_map_2.map.gz | 928.8 MB 928.8 MB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-61198 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-61198 | HTTPS FTP |
-Validation report
| Summary document | emd_61198_validation.pdf.gz | 1.1 MB | Display | EMDB validaton report |
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| Full document | emd_61198_full_validation.pdf.gz | 1.1 MB | Display | |
| Data in XML | emd_61198_validation.xml.gz | 21.7 KB | Display | |
| Data in CIF | emd_61198_validation.cif.gz | 26 KB | Display | |
| Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-61198 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-61198 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 9j79MC ![]() 9j77C ![]() 9j78C ![]() 9j7aC ![]() 9j7bC ![]() 9jceC ![]() 9lkxC ![]() 9lkyC 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_61198.map.gz / Format: CCP4 / Size: 1000 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: 0.82 Å | ||||||||||||||||||||||||||||||||||||
| Density |
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| Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
| Details | EMDB XML:
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-Supplemental data
-Half map: #2
| File | emd_61198_half_map_1.map | ||||||||||||
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| Density Histograms |
-Half map: #1
| File | emd_61198_half_map_2.map | ||||||||||||
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| Density Histograms |
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Sample components
+Entire : Cryo-EM structure of CRL2-FEM1B bound with TOM20(tetramer)
+Supramolecule #1: Cryo-EM structure of CRL2-FEM1B bound with TOM20(tetramer)
+Macromolecule #1: Cullin-2
+Macromolecule #2: Elongin-C
+Macromolecule #3: Elongin-B
+Macromolecule #4: E3 ubiquitin-protein ligase RBX1, N-terminally processed
+Macromolecule #5: Protein fem-1 homolog B
+Macromolecule #6: Mitochondrial import receptor subunit TOM20 homolog
+Macromolecule #7: Poly-UNK
+Macromolecule #8: Poly-UNK
+Macromolecule #9: ZINC 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: 7.5 |
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| Grid | Model: Quantifoil R2/1 / Material: COPPER / Mesh: 200 / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 20 sec. |
| Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277.15 K |
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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) / Detector mode: SUPER-RESOLUTION / Average electron dose: 55.8 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: 2.9 µm / Nominal defocus min: 1.8 µm |
| Sample stage | Cooling holder cryogen: NITROGEN |
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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About Yorodumi




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