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Open data
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Basic information
| Entry | ![]() | |||||||||
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| Title | rat megalin RAP complex | |||||||||
Map data | postprocess consensus map | |||||||||
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Keywords | endocytosis receptor / ENDOCYTOSIS | |||||||||
| Function / homology | Function and homology informationregulation of receptor-mediated endocytosis / negative regulation of very-low-density lipoprotein particle clearance / chemoattraction of axon / pulmonary artery morphogenesis / rough endoplasmic reticulum lumen / lipase binding / positive regulation of oligodendrocyte progenitor proliferation / secondary heart field specification / folate import across plasma membrane / receptor antagonist activity ...regulation of receptor-mediated endocytosis / negative regulation of very-low-density lipoprotein particle clearance / chemoattraction of axon / pulmonary artery morphogenesis / rough endoplasmic reticulum lumen / lipase binding / positive regulation of oligodendrocyte progenitor proliferation / secondary heart field specification / folate import across plasma membrane / receptor antagonist activity / amyloid-beta clearance by transcytosis / ventricular compact myocardium morphogenesis / negative regulation of amyloid-beta clearance / response to leptin / very-low-density lipoprotein particle receptor binding / metal ion transport / coronary artery morphogenesis / neuron projection arborization / cis-Golgi network / outflow tract septum morphogenesis / negative regulation of receptor internalization / low-density lipoprotein particle receptor binding / vagina development / endoplasmic reticulum-Golgi intermediate compartment / negative regulation of BMP signaling pathway / positive regulation of endocytosis / endocytic vesicle / neural tube closure / axonal growth cone / kidney development / clathrin-coated pit / endomembrane system / sensory perception of sound / receptor-mediated endocytosis / endosome lumen / phosphatidylinositol 3-kinase/protein kinase B signal transduction / brush border membrane / male gonad development / SH3 domain binding / Golgi lumen / heparin binding / protein transport / protein-folding chaperone binding / vesicle / signaling receptor complex / endosome / receptor ligand activity / external side of plasma membrane / calcium ion binding / dendrite / Golgi apparatus / cell surface / signal transduction / endoplasmic reticulum / plasma membrane Similarity search - Function | |||||||||
| Biological species | ![]() | |||||||||
| Method | 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, 1 items
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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
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Downloads & links
-EMDB archive
| Map data | emd_36663.map.gz | 42.8 MB | EMDB map data format | |
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| Header (meta data) | emd-36663-v30.xml emd-36663.xml | 30.7 KB 30.7 KB | Display Display | EMDB header |
| FSC (resolution estimation) | emd_36663_fsc.xml | 9.2 KB | Display | FSC data file |
| Images | emd_36663.png | 169.4 KB | ||
| Masks | emd_36663_msk_1.map | 67 MB | Mask map | |
| Filedesc metadata | emd-36663.cif.gz | 9.8 KB | ||
| Others | emd_36663_additional_1.map.gz emd_36663_half_map_1.map.gz emd_36663_half_map_2.map.gz | 28.6 MB 52.2 MB 52.2 MB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-36663 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-36663 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 8jutMC ![]() 8juuC ![]() 8jx8C ![]() 8jx9C ![]() 8jxaC ![]() 8jxbC ![]() 8jxcC ![]() 8jxdC ![]() 8jxeC ![]() 8jxfC ![]() 8jxgC ![]() 8jxhC ![]() 8jxiC ![]() 8jxjC 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_36663.map.gz / Format: CCP4 / Size: 67 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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| Annotation | postprocess consensus map | ||||||||||||||||||||||||||||||||||||
| Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
| Voxel size | X=Y=Z: 1.411 Å | ||||||||||||||||||||||||||||||||||||
| Density |
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| Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
| Details | EMDB XML:
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-Supplemental data
-Mask #1
| File | emd_36663_msk_1.map | ||||||||||||
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-Additional map: composite map
| File | emd_36663_additional_1.map | ||||||||||||
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| Annotation | composite map | ||||||||||||
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-Half map: halfmap1
| File | emd_36663_half_map_1.map | ||||||||||||
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| Annotation | halfmap1 | ||||||||||||
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| Density Histograms |
-Half map: halfmap2
| File | emd_36663_half_map_2.map | ||||||||||||
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| Annotation | halfmap2 | ||||||||||||
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Sample components
+Entire : megalin-RAP complex
+Supramolecule #1: megalin-RAP complex
+Macromolecule #1: LDL receptor related protein 2
+Macromolecule #2: Alpha-2-macroglobulin receptor-associated protein
+Macromolecule #3: unclear peptide
+Macromolecule #4: unclear peptide
+Macromolecule #5: unclear peptide
+Macromolecule #6: unclear peptide
+Macromolecule #7: unclear peptide
+Macromolecule #8: unclear peptide
+Macromolecule #17: 2-acetamido-2-deoxy-beta-D-glucopyranose
+Macromolecule #18: 2-acetamido-2-deoxy-alpha-D-galactopyranose
+Macromolecule #19: CALCIUM ION
+Macromolecule #20: NICKEL (II) 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: 7.4 |
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| Vitrification | Cryogen name: ETHANE / Instrument: FEI VITROBOT MARK IV |
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Electron microscopy
| Microscope | FEI TITAN KRIOS |
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| Image recording | Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / 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: 1.6 µm / Nominal defocus min: 0.6 µm |
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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About Yorodumi




Keywords
Authors
Japan, 1 items
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Processing
FIELD EMISSION GUN

