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- EMDB-31913: 3.28 A structure of the rabbit muscle aldolase -

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Basic information

Entry
Database: EMDB / ID: EMD-31913
Title3.28 A structure of the rabbit muscle aldolase
Map data
Sample
  • Complex: Rabbit muscle aldolase
    • Protein or peptide: Fructose-bisphosphate aldolase A
KeywordsRabbit muscle aldolase / STRUCTURAL PROTEIN
Function / homology
Function and homology information


negative regulation of Arp2/3 complex-mediated actin nucleation / fructose-bisphosphate aldolase / fructose-bisphosphate aldolase activity / M band / I band / glycolytic process / protein homotetramerization / positive regulation of cell migration
Similarity search - Function
Fructose-bisphosphate aldolase class-I active site / Fructose-bisphosphate aldolase class-I active site. / Fructose-bisphosphate aldolase, class-I / Fructose-bisphosphate aldolase class-I / Aldolase-type TIM barrel
Similarity search - Domain/homology
Fructose-bisphosphate aldolase A
Similarity search - Component
Biological speciesOryctolagus cuniculus (rabbit)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.28 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: 0.009
  • Imaged by UCSF Chimera
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  • Surface view colored by radius
  • Surface level: 0.009
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-7vdc
  • Surface level: 0.009
  • Imaged by UCSF Chimera
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  • Simplified surface model + fitted atomic model
  • Atomic modelsPDB-7vdc
  • Imaged by Jmol
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_31913.png

Downloads & links

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Map

FileDownload / File: emd_31913.map.gz / Format: CCP4 / Size: 91.1 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 288 pix.
= 187.2 Å		0.65 Å/pix.
x 288 pix.
= 187.2 Å		0.65 Å/pix.
x 288 pix.
= 187.2 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: 0.0075 / Movie #1: 0.009
Minimum - Maximum-0.036994584 - 0.06352674
Average (Standard dev.)0.000028056415 (±0.0027190426)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions288288288
Spacing288288288
CellA=B=C: 187.2 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z0.650.650.65
M x/y/z288288288
origin x/y/z0.0000.0000.000
length x/y/z187.200187.200187.200
α/β/γ90.00090.00090.000
start NX/NY/NZ000
NX/NY/NZ480480480
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS288288288
D min/max/mean-0.0370.0640.000

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Supplemental data

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Half map: #1

Fileemd_31913_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #2

Fileemd_31913_half_map_2.map
Projections & Slices
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Histogram

Histogram (log scale)

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Sample components

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Entire : Rabbit muscle aldolase

EntireName: Rabbit muscle aldolase
Components
  • Complex: Rabbit muscle aldolase
    • Protein or peptide: Fructose-bisphosphate aldolase A

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Supramolecule #1: Rabbit muscle aldolase

SupramoleculeName: Rabbit muscle aldolase / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Oryctolagus cuniculus (rabbit)
Molecular weightTheoretical: 150 KDa

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Macromolecule #1: Fructose-bisphosphate aldolase A

MacromoleculeName: Fructose-bisphosphate aldolase A / type: protein_or_peptide / ID: 1 / Number of copies: 4 / Enantiomer: LEVO / EC number: fructose-bisphosphate aldolase
Source (natural)Organism: Oryctolagus cuniculus (rabbit)
Molecular weightTheoretical: 39.394875 KDa
SequenceString: MPHSHPALTP EQKKELSDIA HRIVAPGKGI LAADESTGSI AKRLQSIGTE NTEENRRFYR QLLLTADDRV NPCIGGVILF HETLYQKAD DGRPFPQVIK SKGGVVGIKV DKGVVPLAGT NGETTTQGLD GLSERCAQYK KDGADFAKWR CVLKIGEHTP S ALAIMENA ...String:
MPHSHPALTP EQKKELSDIA HRIVAPGKGI LAADESTGSI AKRLQSIGTE NTEENRRFYR QLLLTADDRV NPCIGGVILF HETLYQKAD DGRPFPQVIK SKGGVVGIKV DKGVVPLAGT NGETTTQGLD GLSERCAQYK KDGADFAKWR CVLKIGEHTP S ALAIMENA NVLARYASIC QQNGIVPIVE PEILPDGDHD LKRCQYVTEK VLAAVYKALS DHHIYLEGTL LKPNMVTPGH AC TQKYSHE EIAMATVTAL RRTVPPAVTG VTFLSGGQSE EEASINLNAI NKCPLLKPWA LTFSYGRALQ ASALKAWGGK KEN LKAAQE EYVKRALANS LACQGKYTPS GQAGAAASES LFISNHAY

UniProtKB: Fructose-bisphosphate aldolase A

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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

Concentration1.2 mg/mL
BufferpH: 7.5 / Component:
ConcentrationFormula
20.0 mMHEPES
50.0 mMNaCl
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: 2460 / Average electron dose: 70.0 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: 769925
CTF correctionSoftware - Name: Gctf (ver. 1.06) / Type: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: EMDB MAP
EMDB ID:

8743

Final reconstructionApplied symmetry - Point group: D2 (2x2 fold dihedral) / Algorithm: FOURIER SPACE / Resolution.type: BY AUTHOR / Resolution: 3.28 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 3.1) / Number images used: 228832
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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