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- EMDB-29545: 4 degree_IFS-A2 -

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Basic information

Entry
Database: EMDB / ID: EMD-29545
Title4 degree_IFS-A2
Map data
Sample
  • Complex: GltPh RSMR mutant bound with Na and Asp
    • Protein or peptide: glutamate transporter homolog
Biological speciesPyrococcus horikoshii (archaea)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.39 Å
AuthorsHuang Y / Boudker O
Funding support United States, 2 items
OrganizationGrant numberCountry
Howard Hughes Medical Institute (HHMI) United States
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)R37NS085318 United States
CitationJournal: J Am Chem Soc / Year: 2023
Title: Environmentally Ultrasensitive Fluorine Probe to Resolve Protein Conformational Ensembles by F NMR and Cryo-EM.
Authors: Yun Huang / Krishna D Reddy / Clay Bracken / Biao Qiu / Wenhu Zhan / David Eliezer / Olga Boudker /
Abstract: Limited chemical shift dispersion represents a significant barrier to studying multistate equilibria of large membrane proteins by F NMR. We describe a novel monofluoroethyl F probe that dramatically ...Limited chemical shift dispersion represents a significant barrier to studying multistate equilibria of large membrane proteins by F NMR. We describe a novel monofluoroethyl F probe that dramatically increases the chemical shift dispersion. The improved conformational sensitivity and line shape enable the detection of previously unresolved states in one-dimensional (1D) F NMR spectra of a 134 kDa membrane transporter. Changes in the populations of these states in response to ligand binding, mutations, and temperature correlate with population changes of distinct conformations in structural ensembles determined by single-particle cryo-electron microscopy (cryo-EM). Thus, F NMR can guide sample preparation to discover and visualize novel conformational states and facilitate image analysis and three-dimensional (3D) classification.
History
DepositionJan 25, 2023-
Header (metadata) releaseApr 26, 2023-
Map releaseApr 26, 2023-
UpdateMay 3, 2023-
Current statusMay 3, 2023Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_29545.png

Downloads & links

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Map

FileDownload / File: emd_29545.map.gz / Format: CCP4 / Size: 216 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.85 Å/pix.
x 384 pix.
= 327.168 Å		0.85 Å/pix.
x 384 pix.
= 327.168 Å		0.85 Å/pix.
x 384 pix.
= 327.168 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.852 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.348
Minimum - Maximum-0.618797 - 1.4393338
Average (Standard dev.)0.003071845 (±0.033999864)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions384384384
Spacing384384384
CellA=B=C: 327.168 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #1

Fileemd_29545_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_29545_half_map_2.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : GltPh RSMR mutant bound with Na and Asp

EntireName: GltPh RSMR mutant bound with Na and Asp
Components
  • Complex: GltPh RSMR mutant bound with Na and Asp
    • Protein or peptide: glutamate transporter homolog

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Supramolecule #1: GltPh RSMR mutant bound with Na and Asp

SupramoleculeName: GltPh RSMR mutant bound with Na and Asp / type: complex / ID: 1 / Chimera: Yes / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Pyrococcus horikoshii (archaea)

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Macromolecule #1: glutamate transporter homolog

MacromoleculeName: glutamate transporter homolog / type: protein_or_peptide / ID: 1 / Enantiomer: LEVO
SequenceString: MGLYRKYIEY PVLQKILIGL ILGAIVGLIL GHYGYAHAVH TYVKPFGDLF VRLLKMLVMP IVFASLVVGA ASISPARLGR VGVKIVVYY LLTSAFAVTL GIIMARLFNP GAGIHLAVGG QQFQPHQAPP LVHILLDIVP TNPFGALANG QVLPTIFFAI I LGIAITYL ...String:
MGLYRKYIEY PVLQKILIGL ILGAIVGLIL GHYGYAHAVH TYVKPFGDLF VRLLKMLVMP IVFASLVVGA ASISPARLGR VGVKIVVYY LLTSAFAVTL GIIMARLFNP GAGIHLAVGG QQFQPHQAPP LVHILLDIVP TNPFGALANG QVLPTIFFAI I LGIAITYL MNSENEKVRK SAETLLDAIN GLAEAMYKIV NGVMQYAPIG VFALIAHVMA HQGVHVVGEL AKVTAAVYVG LT LQILLVY FVLLKIYGID PISFIKHAKD AMLTAFVTSS SSGTLPVTMR VAKEMGISEG IYSFTLPLGA TINMDGTALY QGV ATFFIA NALGSHLTVG QQLTIVLTAV LASIGTAGVP GAGAIMLAMV LHSVGLPLTD PNVAAAYA(EFC)I LGIDAILDRG RTMVNVTGD LTGTAIVAKT EGT

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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

BufferpH: 7.4
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 278 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 56.04 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 1.6 µm / Nominal defocus min: 1.3 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.39 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 175313
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD
FSC plot (resolution estimation)

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