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- EMDB-26498: Asp-bound GltPh RSMR mutant in IFS-B1 state -

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Basic information

Entry
Database: EMDB / ID: EMD-26498
TitleAsp-bound GltPh RSMR mutant in IFS-B1 state
Map dataAsp-bound GltPh RSMR mutant in IFS-B1 state
Sample
  • Complex: GltPh RSMR mutant bound with Na and Asp
    • Protein or peptide: Glutamate transporter homolog
  • Ligand: ASPARTIC ACID
  • Ligand: SODIUM ION
KeywordsGltPh / glutamate transporter / substrate / TRANSPORT PROTEIN
Function / homology
Function and homology information


L-aspartate transmembrane transport / amino acid:sodium symporter activity / L-aspartate transmembrane transporter activity / L-aspartate import across plasma membrane / chloride transmembrane transporter activity / protein homotrimerization / chloride transmembrane transport / metal ion binding / identical protein binding / plasma membrane
Similarity search - Function
Sodium:dicarboxylate symporter / Sodium:dicarboxylate symporter, conserved site / Sodium:dicarboxylate symporter superfamily / Sodium:dicarboxylate symporter family / Sodium:dicarboxylate symporter family signature 1.
Similarity search - Domain/homology
Glutamate transporter homolog
Similarity search - Component
Biological speciesPyrococcus horikoshii (archaea)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.96 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
DepositionMar 25, 2022-
Header (metadata) releaseMar 29, 2023-
Map releaseMar 29, 2023-
UpdateMay 28, 2025-
Current statusMay 28, 2025Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_26498.png

Downloads & links

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Map

FileDownload / File: emd_26498.map.gz / Format: CCP4 / Size: 166.4 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationAsp-bound GltPh RSMR mutant in IFS-B1 state
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.85 Å/pix.
x 352 pix.
= 299.904 Å		0.85 Å/pix.
x 352 pix.
= 299.904 Å		0.85 Å/pix.
x 352 pix.
= 299.904 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: 0.422
Minimum - Maximum-0.758342 - 1.6644411
Average (Standard dev.)0.0026011465 (±0.035190802)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions352352352
Spacing352352352
CellA=B=C: 299.904 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: Half Map 1

Fileemd_26498_half_map_1.map
AnnotationHalf Map 1
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Half Map 2

Fileemd_26498_half_map_2.map
AnnotationHalf Map 2
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
  • Ligand: ASPARTIC ACID
  • Ligand: SODIUM ION

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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 / Parent: 0 / Macromolecule list: #1
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 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Pyrococcus horikoshii (archaea)
Strain: ATCC 700860 / DSM 12428 / JCM 9974 / NBRC 100139 / OT-3
Molecular weightTheoretical: 44.13323 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
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

UniProtKB: Glutamate transporter homolog

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Macromolecule #2: ASPARTIC ACID

MacromoleculeName: ASPARTIC ACID / type: ligand / ID: 2 / Number of copies: 1 / Formula: ASP
Molecular weightTheoretical: 133.103 Da
Chemical component information

ChemComp-ASP:
ASPARTIC ACID

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Macromolecule #3: SODIUM ION

MacromoleculeName: SODIUM ION / type: ligand / ID: 3 / Number of copies: 3
Molecular weightTheoretical: 22.99 Da

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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: 303 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: 50.94 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 1.5 µm / Nominal defocus min: 1.3 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

CTF correctionType: NONE
Startup modelType of model: PDB ENTRY
PDB model - PDB ID:

4x2s


Details: chain B
Final reconstructionResolution.type: BY AUTHOR / Resolution: 2.96 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 326008
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD
FSC plot (resolution estimation)

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