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Open data
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Basic information
| Entry | Database: PDB / ID: 8jut | ||||||
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| Title | rat megalin RAP complex | ||||||
Components |
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Keywords | ENDOCYTOSIS / endocytosis receptor | ||||||
| Function / homology | Function and homology informationregulation of receptor-mediated endocytosis / negative regulation of very-low-density lipoprotein particle clearance / chemoattraction of axon / diol metabolic process / positive regulation of oligodendrocyte progenitor proliferation / pulmonary artery morphogenesis / secondary heart field specification / rough endoplasmic reticulum lumen / lipase binding / folate import across plasma membrane ...regulation of receptor-mediated endocytosis / negative regulation of very-low-density lipoprotein particle clearance / chemoattraction of axon / diol metabolic process / positive regulation of oligodendrocyte progenitor proliferation / pulmonary artery morphogenesis / secondary heart field specification / rough endoplasmic reticulum lumen / lipase binding / folate import across plasma membrane / receptor antagonist activity / amyloid-beta clearance by transcytosis / negative regulation of amyloid-beta clearance / ventricular compact myocardium morphogenesis / response to leptin / metal ion transport / vitamin D metabolic process / cranial skeletal system development / very-low-density lipoprotein particle receptor binding / neuron projection arborization / coronary artery morphogenesis / cis-Golgi network / negative regulation of receptor internalization / outflow tract septum morphogenesis / aorta development / ventricular septum development / low-density lipoprotein particle receptor binding / endoplasmic reticulum-Golgi intermediate compartment / forebrain development / vagina development / positive regulation of endocytosis / endocytic vesicle / negative regulation of BMP signaling pathway / axonal growth cone / clathrin-coated pit / endomembrane system / receptor-mediated endocytosis / endosome lumen / neural tube closure / kidney development / phosphatidylinositol 3-kinase/protein kinase B signal transduction / brush border membrane / sensory perception of sound / Golgi lumen / SH3 domain binding / male gonad development / heparin binding / protein transport / protein-folding chaperone binding / gene expression / vesicle / cell population proliferation / receptor complex / endosome / receptor ligand activity / external side of plasma membrane / calcium ion binding / dendrite / negative regulation of apoptotic process / cell surface / endoplasmic reticulum / Golgi apparatus / signal transduction / plasma membrane Similarity search - Function | ||||||
| Biological species | ![]() | ||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.2 Å | ||||||
Authors | Goto, S. / Tsutsumi, A. / Lee, Y. / Hosojima, M. / Kabasawa, H. / Komochi, K. / Yun-san, L. / Nagatoshi, S. / Tsumoto, K. / Nishizawa, T. ...Goto, S. / Tsutsumi, A. / Lee, Y. / Hosojima, M. / Kabasawa, H. / Komochi, K. / Yun-san, L. / Nagatoshi, S. / Tsumoto, K. / Nishizawa, T. / Kikkawa, M. / Saito, A. | ||||||
| Funding support | Japan, 1items
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Citation | Journal: Proc Natl Acad Sci U S A / Year: 2024Title: Cryo-EM structures elucidate the multiligand receptor nature of megalin. Authors: Sawako Goto / Akihisa Tsutsumi / Yongchan Lee / Michihiro Hosojima / Hideyuki Kabasawa / Koichi Komochi / Satoru Nagatoishi / Kazuya Takemoto / Kouhei Tsumoto / Tomohiro Nishizawa / Masahide ...Authors: Sawako Goto / Akihisa Tsutsumi / Yongchan Lee / Michihiro Hosojima / Hideyuki Kabasawa / Koichi Komochi / Satoru Nagatoishi / Kazuya Takemoto / Kouhei Tsumoto / Tomohiro Nishizawa / Masahide Kikkawa / Akihiko Saito / ![]() Abstract: Megalin (low-density lipoprotein receptor-related protein 2) is a giant glycoprotein of about 600 kDa, mediating the endocytosis of more than 60 ligands, including those of proteins, peptides, and ...Megalin (low-density lipoprotein receptor-related protein 2) is a giant glycoprotein of about 600 kDa, mediating the endocytosis of more than 60 ligands, including those of proteins, peptides, and drug compounds [S. Goto, M. Hosojima, H. Kabasawa, A. Saito, , 106393 (2023)]. It is expressed predominantly in renal proximal tubule epithelial cells, as well as in the brain, lungs, eyes, inner ear, thyroid gland, and placenta. Megalin is also known to mediate the endocytosis of toxic compounds, particularly those that cause renal and hearing disorders [Y. Hori , , 1783-1791 (2017)]. Genetic megalin deficiency causes Donnai-Barrow syndrome/facio-oculo-acoustico-renal syndrome in humans. However, it is not known how megalin interacts with such a wide variety of ligands and plays pathological roles in various organs. In this study, we elucidated the dimeric architecture of megalin, purified from rat kidneys, using cryoelectron microscopy. The maps revealed the densities of endogenous ligands bound to various regions throughout the dimer, elucidating the multiligand receptor nature of megalin. We also determined the structure of megalin in complex with receptor-associated protein, a molecular chaperone for megalin. The results will facilitate further studies on the pathophysiology of megalin-dependent multiligand endocytic pathways in multiple organs and will also be useful for the development of megalin-targeted drugs for renal and hearing disorders, Alzheimer's disease [B. V. Zlokovic , , 4229-4234 (1996)], and other illnesses. | ||||||
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Structure visualization
| Structure viewer | Molecule: Molmil Jmol/JSmol |
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Downloads & links
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Download
| PDBx/mmCIF format | 8jut.cif.gz | 1.8 MB | Display | PDBx/mmCIF format |
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| PDB format | pdb8jut.ent.gz | 1.5 MB | Display | PDB format |
| PDBx/mmJSON format | 8jut.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Summary document | 8jut_validation.pdf.gz | 4.2 MB | Display | wwPDB validaton report |
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| Full document | 8jut_full_validation.pdf.gz | 4.3 MB | Display | |
| Data in XML | 8jut_validation.xml.gz | 232.7 KB | Display | |
| Data in CIF | 8jut_validation.cif.gz | 358.1 KB | Display | |
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/ju/8jut ftp://data.pdbj.org/pub/pdb/validation_reports/ju/8jut | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 36663MC ![]() 8juuC ![]() 8jx8C ![]() 8jx9C ![]() 8jxaC ![]() 8jxbC ![]() 8jxcC ![]() 8jxdC ![]() 8jxeC ![]() 8jxfC ![]() 8jxgC ![]() 8jxhC ![]() 8jxiC ![]() 8jxjC M: map data used to model this data C: citing same article ( |
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| Similar structure data | Similarity search - Function & homology F&H Search |
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Links
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Assembly
| Deposited unit | ![]()
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Components
-Protein , 2 types, 4 molecules ABCD
| #1: Protein | Mass: 519871.438 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) ![]() #2: Protein | Mass: 42112.809 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
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-Protein/peptide , 6 types, 14 molecules GNHOIPJQKRLMST
| #3: Protein/peptide | Mass: 528.644 Da / Num. of mol.: 2 / Source method: isolated from a natural source Details: Authors state that they could not experimentally confirm this sequence. Therefore residue numbers and chain IDs are meaningless for entity 3-8. Source: (natural) ![]() #4: Protein/peptide | Mass: 472.537 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) ![]() #5: Protein/peptide | Mass: 556.697 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) ![]() #6: Protein/peptide | Mass: 291.368 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) ![]() #7: Protein/peptide | Mass: 531.557 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) ![]() #8: Protein/peptide | Mass: 472.537 Da / Num. of mol.: 4 / Source method: isolated from a natural source / Source: (natural) ![]() |
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-Sugars , 10 types, 90 molecules 


| #9: Polysaccharide | 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose #10: Polysaccharide | alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2- ...alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose #11: Polysaccharide | alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-3)-2-acetamido-2- ...alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-3)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose | Type: oligosaccharide / Mass: 910.823 Da / Num. of mol.: 1 / Source method: obtained synthetically #12: Polysaccharide | beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta- ...beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose Source method: isolated from a genetically manipulated source #13: Polysaccharide | #14: Polysaccharide | Type: oligosaccharide / Mass: 910.823 Da / Num. of mol.: 2 / Source method: obtained synthetically #15: Polysaccharide | beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-3)-2-acetamido-2-deoxy-beta- ...beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-3)-2-acetamido-2-deoxy-beta-D-glucopyranose | Source method: isolated from a genetically manipulated source #16: Polysaccharide | Source method: isolated from a genetically manipulated source #17: Sugar | ChemComp-NAG / #18: Sugar | ChemComp-A2G / |
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-Non-polymers , 2 types, 90 molecules 


| #19: Chemical | ChemComp-CA / #20: Chemical | |
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-Details
| Has ligand of interest | N |
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| Has protein modification | Y |
-Experimental details
-Experiment
| Experiment | Method: ELECTRON MICROSCOPY |
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| EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
| Component | Name: megalin-RAP complex / Type: COMPLEX / Entity ID: #1-#8 / Source: NATURAL |
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| Source (natural) | Organism: ![]() |
| Buffer solution | pH: 7.4 |
| Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
| Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE |
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Electron microscopy imaging
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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| Microscopy | Model: FEI TITAN KRIOS |
| Electron gun | Electron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
| Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 1600 nm / Nominal defocus min: 600 nm |
| Image recording | Electron dose: 50 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) |
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Processing
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| CTF correction | Type: PHASE FLIPPING ONLY | ||||||||||||||||||||
| Symmetry | Point symmetry: C1 (asymmetric) | ||||||||||||||||||||
| 3D reconstruction | Resolution: 4.2 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 67775 / Algorithm: BACK PROJECTION / Symmetry type: POINT |
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FIELD EMISSION GUN