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Open data
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Basic information
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Title | cryoEM structure of ERGIC-53 deltaH34 mutant with MCFD2 | |||||||||
![]() | raw map | |||||||||
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![]() | cargo receptor / calcium / zinc / PROTEIN TRANSPORT | |||||||||
Biological species | ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.78 Å | |||||||||
![]() | Watanabe S / Inaba K | |||||||||
Funding support | ![]()
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![]() | ![]() Title: Structure of full-length ERGIC-53 in complex with MCFD2 for cargo transport. Authors: Satoshi Watanabe / Yoshiaki Kise / Kento Yonezawa / Mariko Inoue / Nobutaka Shimizu / Osamu Nureki / Kenji Inaba / ![]() Abstract: ERGIC-53 transports certain subsets of newly synthesized secretory proteins and membrane proteins from the endoplasmic reticulum to the Golgi apparatus. Despite numerous structural and functional ...ERGIC-53 transports certain subsets of newly synthesized secretory proteins and membrane proteins from the endoplasmic reticulum to the Golgi apparatus. Despite numerous structural and functional studies since its identification, the overall architecture and mechanism of action of ERGIC-53 remain unclear. Here we present cryo-EM structures of full-length ERGIC-53 in complex with its functional partner MCFD2. These structures reveal that ERGIC-53 exists as a homotetramer, not a homohexamer as previously suggested, and comprises a four-leaf clover-like head and a long stalk composed of three sets of four-helix coiled-coil followed by a transmembrane domain. 3D variability analysis visualizes the flexible motion of the long stalk and local plasticity of the head region. Notably, MCFD2 is shown to possess a Zn-binding site in its N-terminal lid, which appears to modulate cargo binding. Altogether, distinct mechanisms of cargo capture and release by ERGIC- 53 via the stalk bending and metal binding are proposed. | |||||||||
History |
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Structure visualization
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 63.2 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 27 KB 27 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 11.9 KB | Display | ![]() |
Images | ![]() | 77.3 KB | ||
Masks | ![]() | 125 MB | ![]() | |
Filedesc metadata | ![]() | 5.3 KB | ||
Others | ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() | 12.2 MB 12.2 MB 12.2 MB 12.2 MB 12.2 MB 12.2 MB 116 MB 116 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
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Links
EMDB pages | ![]() ![]() |
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Map
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Annotation | raw map | ||||||||||||||||||||
Voxel size | X=Y=Z: 1.379 Å | ||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Mask #1
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-Additional map: component III first
File | emd_36482_additional_1.map | ||||||||||||
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Annotation | component III first | ||||||||||||
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-Additional map: component I last
File | emd_36482_additional_2.map | ||||||||||||
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Annotation | component I last | ||||||||||||
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-Additional map: component I 1st
File | emd_36482_additional_3.map | ||||||||||||
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Annotation | component I 1st | ||||||||||||
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-Additional map: component II 1st
File | emd_36482_additional_4.map | ||||||||||||
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Annotation | component II 1st | ||||||||||||
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-Additional map: component II last
File | emd_36482_additional_5.map | ||||||||||||
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Annotation | component II last | ||||||||||||
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-Additional map: component III last
File | emd_36482_additional_6.map | ||||||||||||
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Annotation | component III last | ||||||||||||
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-Half map: half map1
File | emd_36482_half_map_1.map | ||||||||||||
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Annotation | half map1 | ||||||||||||
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-Half map: half map2
File | emd_36482_half_map_2.map | ||||||||||||
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Annotation | half map2 | ||||||||||||
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Sample components
-Entire : ERGIC-53-MCFD2 complex
Entire | Name: ERGIC-53-MCFD2 complex |
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Components |
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-Supramolecule #1: ERGIC-53-MCFD2 complex
Supramolecule | Name: ERGIC-53-MCFD2 complex / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all |
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Source (natural) | Organism: ![]() |
-Macromolecule #1: ERGIC-53
Macromolecule | Name: ERGIC-53 / type: other / ID: 1 / Classification: other |
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Source (natural) | Organism: ![]() |
Sequence | String: MAGSRQRGLR ARVRPLFCAL LLSLGRFVRG DGVGGDPAVA LPHRRFEYK YSFKGPHLVQ SDGTVPFWAH AGNAIPSSDQ I RVAPSLKS QRGSVWTKTK AAFENWEVEV TFRVTGRGRI GA DGLAIWY AENQGLEGPV FGSADLWNGV GIFFDSFDND GKK NNPAIV ...String: MAGSRQRGLR ARVRPLFCAL LLSLGRFVRG DGVGGDPAVA LPHRRFEYK YSFKGPHLVQ SDGTVPFWAH AGNAIPSSDQ I RVAPSLKS QRGSVWTKTK AAFENWEVEV TFRVTGRGRI GA DGLAIWY AENQGLEGPV FGSADLWNGV GIFFDSFDND GKK NNPAIV IIGNNGQIHY DHQNDGASQA LASCQRDFRN KPYP VRAKI TYYQNTLTVM INNGFTPDKN DYEFCAKVEN MIIPA QGHF GISAATGGLA DDHDVLSFLT FQLTEPGKEP PTPDKE ISE KEKEKYQEEF EHFQQELDKK KEEFQKGHPD LQGQPAE EI FESVGDRELR QVFEGQNRIH LEIKQLNRQL DMILDEQR R YVSSLTEEIS SNEKPKCPEL PPFPSCLSTV HFIIFVVVQ TVLFIGYIMY RSQQEAAAKK FFDYKDDDDK |
Recombinant expression | Organism: ![]() |
-Macromolecule #2: MCFD2
Macromolecule | Name: MCFD2 / type: other / ID: 2 / Classification: other |
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Source (natural) | Organism: ![]() |
Sequence | String: GSHMEEPAAS FSQPGSMGLD KNTVHDQEHI MEHLEGVINK PEAEMSPQEL QLHYFKMHDY DGNNLLDGLE LSTAITHVHK EEGSEQAPLM SEDELINIID GVLRDDDKNN DGYIDYAEFA KSLQ |
Recombinant expression | Organism: ![]() ![]() |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | 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 | JEOL CRYO ARM 300 |
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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: ![]() |
Electron optics | Illumination mode: OTHER / Imaging mode: BRIGHT FIELD / Nominal defocus max: 1.6 µm / Nominal defocus min: 0.8 µm |
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Image processing
-Atomic model buiding 1
Refinement | Space: REAL |
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