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- EMDB-31912: 2.26 A structure of the glutamate dehydrogenase -

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Basic information

Entry
Database: EMDB / ID: EMD-31912
Title2.26 A structure of the glutamate dehydrogenase
Map data
Sample
  • Complex: Glutamate dehydrogenase
    • Protein or peptide: Glutamate dehydrogenase 1, mitochondrial
KeywordsGlutamate dehydrogenase / STRUCTURAL PROTEIN
Function / homology
Function and homology information


glutamate dehydrogenase [NAD(P)+] activity / tricarboxylic acid metabolic process / glutamate dehydrogenase [NAD(P)+] / glutamate dehydrogenase (NAD+) activity / glutamate dehydrogenase (NADP+) activity / L-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 (NAD+) activity / glutamate dehydrogenase (NADP+) activity / L-glutamate catabolic process / glutamine metabolic process / mitochondrial inner membrane / GTP binding / endoplasmic reticulum / mitochondrion / ATP binding / identical protein binding
Similarity search - Function
NAD(P) binding domain of glutamate dehydrogenase / Leu/Phe/Val dehydrogenases active site / Glu / Leu / Phe / Val dehydrogenases active site. / Glutamate/phenylalanine/leucine/valine dehydrogenase / Glutamate/phenylalanine/leucine/valine dehydrogenase, dimerisation domain / Glu/Leu/Phe/Val dehydrogenase, dimerisation domain / Glutamate/Leucine/Phenylalanine/Valine dehydrogenase / Glutamate/phenylalanine/leucine/valine dehydrogenase, C-terminal / Glutamate/Leucine/Phenylalanine/Valine dehydrogenase / Aminoacid dehydrogenase-like, N-terminal domain superfamily / NAD(P)-binding domain superfamily
Similarity search - Domain/homology
Glutamate dehydrogenase 1, mitochondrial
Similarity search - Component
Biological speciesBos taurus (domestic cattle)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.26 Å
AuthorsFan HC / Zhang Y
Funding support China, 5 items
OrganizationGrant numberCountry
Ministry of Science and Technology (MoST, China)2017YFA0504700 China
National Natural Science Foundation of China (NSFC)31830020 China
Chinese Academy of SciencesXDB37040102 China
National Natural Science Foundation of China (NSFC)31925026 China
Ministry of Science and Technology (MoST, China)2015DFG32140 China
CitationJournal: Nat Commun / Year: 2021
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
DepositionSep 6, 2021-
Header (metadata) releaseDec 29, 2021-
Map releaseDec 29, 2021-
UpdateJun 25, 2025-
Current statusJun 25, 2025Processing site: PDBj / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.019
  • Imaged by UCSF Chimera
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  • Surface view colored by cylindrical radius
  • Surface level: 0.019
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-7vda
  • Surface level: 0.019
  • Imaged by UCSF Chimera
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  • Simplified surface model + fitted atomic model
  • Atomic modelsPDB-7vda
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_31912.png

Downloads & links

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Map

FileDownload / File: emd_31912.map.gz / Format: CCP4 / Size: 244.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.65 Å/pix.
x 400 pix.
= 260. Å		0.65 Å/pix.
x 400 pix.
= 260. Å		0.65 Å/pix.
x 400 pix.
= 260. Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.65 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.013 / Movie #1: 0.019
Minimum - Maximum-0.04915106 - 0.099673375
Average (Standard dev.)0.000002282608 (±0.0044007017)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions400400400
Spacing400400400
CellA=B=C: 260.0 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z0.650.650.65
M x/y/z400400400
origin x/y/z0.0000.0000.000
length x/y/z260.000260.000260.000
α/β/γ90.00090.00090.000
start NX/NY/NZ000
NX/NY/NZ480480480
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS400400400
D min/max/mean-0.0490.1000.000

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Supplemental data

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Half map: #2

Fileemd_31912_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #1

Fileemd_31912_half_map_2.map
Projections & Slices
AxesZYX

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Slices (1/2)
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Histogram

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Sample components

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Entire : Glutamate dehydrogenase

EntireName: Glutamate dehydrogenase
Components
  • Complex: Glutamate dehydrogenase
    • Protein or peptide: Glutamate dehydrogenase 1, mitochondrial

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Supramolecule #1: Glutamate dehydrogenase

SupramoleculeName: Glutamate dehydrogenase / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Bos taurus (domestic cattle)
Molecular weightTheoretical: 334 KDa

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Macromolecule #1: Glutamate dehydrogenase 1, mitochondrial

MacromoleculeName: Glutamate dehydrogenase 1, mitochondrial / type: protein_or_peptide / ID: 1 / Number of copies: 6 / Enantiomer: LEVO / EC number: glutamate dehydrogenase [NAD(P)+]
Source (natural)Organism: Bos taurus (domestic cattle)
Molecular weightTheoretical: 61.60891 KDa
SequenceString: 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

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

Concentration3 mg/mL
BufferpH: 7.5 / Component - Formula: PBS
GridMaterial: NICKEL/TITANIUM / Mesh: 300
VitrificationCryogen name: ETHANE / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm 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 beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal magnification: 215000
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Particle selectionNumber selected: 35587
CTF correctionSoftware - Name: Gctf (ver. 1.06) / Type: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: EMDB MAP
EMDB ID:

8194

Final reconstructionApplied symmetry - Point group: D3 (2x3 fold dihedral) / Algorithm: FOURIER SPACE / Resolution.type: BY AUTHOR / Resolution: 2.26 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 3.1) / Number images used: 18419
Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 3.1)
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 3.1)
Final 3D classificationSoftware - Name: RELION (ver. 3.1)
FSC plot (resolution estimation)

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