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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-31912 | ||||||||||||||||||
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Title | 2.26 A structure of the glutamate dehydrogenase | ||||||||||||||||||
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![]() | Glutamate dehydrogenase / STRUCTURAL PROTEIN | ||||||||||||||||||
Function / homology | ![]() glutamate dehydrogenase [NAD(P)+] activity / tricarboxylic acid metabolic process / glutamate dehydrogenase [NAD(P)+] / glutamate dehydrogenase (NADP+) activity / glutamate dehydrogenase (NAD+) activity / glutamate catabolic process / glutamine metabolic process / mitochondrial inner membrane / GTP binding / endoplasmic reticulum ...glutamate dehydrogenase [NAD(P)+] activity / tricarboxylic acid metabolic process / glutamate dehydrogenase [NAD(P)+] / glutamate dehydrogenase (NADP+) activity / glutamate dehydrogenase (NAD+) activity / glutamate catabolic process / glutamine metabolic process / mitochondrial inner membrane / GTP binding / endoplasmic reticulum / mitochondrion / ATP binding / identical protein binding Similarity search - Function | ||||||||||||||||||
Biological species | ![]() ![]() | ||||||||||||||||||
Method | single particle reconstruction / cryo EM / Resolution: 2.26 Å | ||||||||||||||||||
![]() | Fan HC / Zhang Y | ||||||||||||||||||
Funding support | ![]()
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![]() | ![]() Title: A cryo-electron microscopy support film formed by 2D crystals of hydrophobin HFBI. Authors: Hongcheng Fan / Bo Wang / Yan Zhang / Yun Zhu / Bo Song / Haijin Xu / Yujia Zhai / Mingqiang Qiao / Fei Sun / ![]() Abstract: Cryo-electron microscopy (cryo-EM) has become a powerful tool to resolve high-resolution structures of biomacromolecules in solution. However, air-water interface induced preferred orientations, ...Cryo-electron microscopy (cryo-EM) has become a powerful tool to resolve high-resolution structures of biomacromolecules in solution. However, air-water interface induced preferred orientations, dissociation or denaturation of biomacromolecules during cryo-vitrification remains a limiting factor for many specimens. To solve this bottleneck, we developed a cryo-EM support film using 2D crystals of hydrophobin HFBI. The hydrophilic side of the HFBI film adsorbs protein particles via electrostatic interactions and sequesters them from the air-water interface, allowing the formation of sufficiently thin ice for high-quality data collection. The particle orientation distribution can be regulated by adjusting the buffer pH. Using this support, we determined the cryo-EM structures of catalase (2.29 Å) and influenza haemagglutinin trimer (2.56 Å), which exhibited strong preferred orientations using a conventional cryo-vitrification protocol. We further show that the HFBI film is suitable to obtain high-resolution structures of small proteins, including aldolase (150 kDa, 3.28 Å) and haemoglobin (64 kDa, 3.6 Å). Our work suggests that HFBI films may have broad future applications in increasing the success rate and efficiency of cryo-EM. | ||||||||||||||||||
History |
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Structure visualization
Movie |
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Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 228.4 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 16.2 KB 16.2 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 14.1 KB | Display | ![]() |
Images | ![]() | 157.1 KB | ||
Filedesc metadata | ![]() | 5.6 KB | ||
Others | ![]() ![]() | 194 MB 194.1 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Validation report
Summary document | ![]() | 1.2 MB | Display | ![]() |
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Full document | ![]() | 1.2 MB | Display | |
Data in XML | ![]() | 20.8 KB | Display | |
Data in CIF | ![]() | 27 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7vdaMC ![]() 7vd8C ![]() 7vd9C ![]() 7vdcC ![]() 7vdeC ![]() 7vdfC M: atomic model generated by this map C: citing same article ( |
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Similar structure data |
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Links
EMDB pages | ![]() ![]() |
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Map
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Voxel size | X=Y=Z: 0.65 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
-Half map: #2
File | emd_31912_half_map_1.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Half map: #1
File | emd_31912_half_map_2.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
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Sample components
-Entire : Glutamate dehydrogenase
Entire | Name: Glutamate dehydrogenase |
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Components |
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-Supramolecule #1: Glutamate dehydrogenase
Supramolecule | Name: Glutamate dehydrogenase / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 334 KDa |
-Macromolecule #1: Glutamate dehydrogenase 1, mitochondrial
Macromolecule | Name: Glutamate dehydrogenase 1, mitochondrial / type: protein_or_peptide / ID: 1 / Number of copies: 6 / Enantiomer: LEVO / EC number: glutamate dehydrogenase [NAD(P)+] |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 61.60891 KDa |
Sequence | String: MYRYLGEALL LSRAGPAALG SASADSAALL GWARGQPAAA PQPGLVPPAR RHYSEAAADR EDDPNFFKMV EGFFDRGASI VEDKLVEDL KTRETEEQKR NRVRSILRII KPCNHVLSLS FPIRRDDGSW EVIEGYRAQH SQHRTPCKGG IRYSTDVSVD E VKALASLM ...String: MYRYLGEALL LSRAGPAALG SASADSAALL GWARGQPAAA PQPGLVPPAR RHYSEAAADR EDDPNFFKMV EGFFDRGASI VEDKLVEDL KTRETEEQKR NRVRSILRII KPCNHVLSLS FPIRRDDGSW EVIEGYRAQH SQHRTPCKGG IRYSTDVSVD E VKALASLM TYKCAVVDVP FGGAKAGVKI NPKNYTDNEL EKITRRFTME LAKKGFIGPG VDVPAPDMST GEREMSWIAD TY ASTIGHY DINAHACVTG KPISQGGIHG RISATGRGVF HGIENFINEA SYMSILGMTP GFGDKTFVVQ GFGNVGLHSM RYL HRFGAK CITVGESDGS IWNPDGIDPK ELEDFKLQHG TILGFPKAKI YEGSILEVDC DILIPAASEK QLTKSNAPRV KAKI IAEGA NGPTTPEADK IFLERNIMVI PDLYLNAGGV TVSYFEWLKN LNHVSYGRLT FKYERDSNYH LLMSVQESLE RKFGK HGGT IPIVPTAEFQ DRISGASEKD IVHSGLAYTM ERSARQIMRT AMKYNLGLDL RTAAYVNAIE KVFRVYNEAG VTFT UniProtKB: Glutamate dehydrogenase 1, mitochondrial |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Concentration | 3 mg/mL |
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Buffer | pH: 7.5 / Component - Formula: PBS |
Grid | Material: NICKEL/TITANIUM / Mesh: 300 |
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 K2 QUANTUM (4k x 4k) / Detector mode: SUPER-RESOLUTION / Number real images: 1635 / Average electron dose: 60.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal magnification: 215000 |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |