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- EMDB-50430: Cryo-EM structure of MBP homo-dimer assembled by homo Di-Gluebody -

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Basic information

Entry
Database: EMDB / ID: EMD-50430
TitleCryo-EM structure of MBP homo-dimer assembled by homo Di-Gluebody
Map datamain
Sample
  • Complex: MBP homo-dimer assembled by homo Di-Gluebody GbMBP
    • Protein or peptide: Maltose/maltodextrin-binding periplasmic protein
    • Protein or peptide: Gluebody anti-MBP
KeywordsGluebody / Nanobody / cryo-EM SPA / small protein / PROTEIN BINDING
Function / homology
Function and homology information


detection of maltose stimulus / maltose transport complex / carbohydrate transport / carbohydrate transmembrane transporter activity / maltose binding / maltose transport / maltodextrin transmembrane transport / ATP-binding cassette (ABC) transporter complex, substrate-binding subunit-containing / ATP-binding cassette (ABC) transporter complex / cell chemotaxis ...detection of maltose stimulus / maltose transport complex / carbohydrate transport / carbohydrate transmembrane transporter activity / maltose binding / maltose transport / maltodextrin transmembrane transport / ATP-binding cassette (ABC) transporter complex, substrate-binding subunit-containing / ATP-binding cassette (ABC) transporter complex / cell chemotaxis / outer membrane-bounded periplasmic space / periplasmic space / DNA damage response / membrane
Similarity search - Function
Maltose/Cyclodextrin ABC transporter, substrate-binding protein / Solute-binding family 1, conserved site / Bacterial extracellular solute-binding proteins, family 1 signature. / Bacterial extracellular solute-binding protein / Bacterial extracellular solute-binding protein
Similarity search - Domain/homology
Maltose/maltodextrin-binding periplasmic protein
Similarity search - Component
Biological speciesEscherichia coli (E. coli) / Lama glama (llama)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.39 Å
AuthorsYi G / Ye M / Mamalis D / Carrique L / Fairhead M / Li H / Duerr K / Zhang P / Sauer DB / von Delft F ...Yi G / Ye M / Mamalis D / Carrique L / Fairhead M / Li H / Duerr K / Zhang P / Sauer DB / von Delft F / Davis BG / Gilbert RJC
Funding support United Kingdom, 1 items
OrganizationGrant numberCountry
Other private United Kingdom
CitationJournal: To Be Published
Title: Di-Gluebodies: Covalently-rigidified, modular protein assemblies enable simultaneous determination of high-resolution, low-size, cryo-EM structures
Authors: Yi G / Ye M / Mamalis D / Carrique L / Fairhead M / Li H / Duerr K / Zhang P / Sauer DB / von Delft F / Davis BG / Gilbert RJC
History
DepositionMay 26, 2024-
Header (metadata) releaseJun 11, 2025-
Map releaseJun 11, 2025-
UpdateJul 9, 2025-
Current statusJul 9, 2025Processing site: PDBe / Status: Released

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Structure visualization

Supplemental images

emd_50430.png

Downloads & links

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Map

FileDownload / File: emd_50430.map.gz / Format: CCP4 / Size: 216 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Annotationmain
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.73 Å/pix.
x 384 pix.
= 280.32 Å		0.73 Å/pix.
x 384 pix.
= 280.32 Å		0.73 Å/pix.
x 384 pix.
= 280.32 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.73 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.135
Minimum - Maximum-0.66768414 - 0.9872082
Average (Standard dev.)0.000040135514 (±0.014101787)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions384384384
Spacing384384384
CellA=B=C: 280.32 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: half A

Fileemd_50430_half_map_1.map
Annotationhalf A
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: half B

Fileemd_50430_half_map_2.map
Annotationhalf B
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : MBP homo-dimer assembled by homo Di-Gluebody GbMBP

EntireName: MBP homo-dimer assembled by homo Di-Gluebody GbMBP
Components
  • Complex: MBP homo-dimer assembled by homo Di-Gluebody GbMBP
    • Protein or peptide: Maltose/maltodextrin-binding periplasmic protein
    • Protein or peptide: Gluebody anti-MBP

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Supramolecule #1: MBP homo-dimer assembled by homo Di-Gluebody GbMBP

SupramoleculeName: MBP homo-dimer assembled by homo Di-Gluebody GbMBP / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Escherichia coli (E. coli)
Molecular weightTheoretical: 114 KDa

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Macromolecule #1: Maltose/maltodextrin-binding periplasmic protein

MacromoleculeName: Maltose/maltodextrin-binding periplasmic protein / type: protein_or_peptide / ID: 1 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Escherichia coli (E. coli)
Molecular weightTheoretical: 43.126527 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: MKIEEGKLVI WINGDKGYNG LAEVGKKFEK DTGIKVTVEH PDKLEEKFPQ VAATGDGPDI IFWAHDRFGG YAQSGLLAEI TPDKAFQDK LYPFTWDAVR YNGKLIAYPI AVEALSLIYN KDLLPNPPKT WEEIPALDKE LKAKGKSALM FNLQEPYFTW P LIAADGGY ...String:
MKIEEGKLVI WINGDKGYNG LAEVGKKFEK DTGIKVTVEH PDKLEEKFPQ VAATGDGPDI IFWAHDRFGG YAQSGLLAEI TPDKAFQDK LYPFTWDAVR YNGKLIAYPI AVEALSLIYN KDLLPNPPKT WEEIPALDKE LKAKGKSALM FNLQEPYFTW P LIAADGGY AFKYENGKYD IKDVGVDNAG AKAGLTFLVD LIKNKHMNAD TDYSIAEAAF NKGETAMTIN GPWAWSNIDT SK VNYGVTV LPTFKGQPSK PFVGVLSAGI NAASPNKELA KEFLENYLLT DEGLEAVNKD KPLGAVALKS YEEELAKDPR IAA TMENAQ KGEIMPNIPQ MSAFWYAVRT AVINAASGRQ TVDEALKDAQ TNSGGSHHHH HHSSGVDLGT ENLYFQ

UniProtKB: Maltose/maltodextrin-binding periplasmic protein

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Macromolecule #2: Gluebody anti-MBP

MacromoleculeName: Gluebody anti-MBP / type: protein_or_peptide / ID: 2 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Lama glama (llama)
Molecular weightTheoretical: 13.788428 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString:
SQVQLVENGG GCVKAGGSLR LSCVASGDIK YISYLGWFRQ APGKEREGVA ALYTSTGRTY YADSVKGRFT VSLDNAKNTV YLQMNSLKP EDTALYYCAA AEWGSQSPLT QWFYRYWGQG TQVMVS

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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: 7.5
Component:
ConcentrationFormulaName
10.0 mMC8H18N2O4SHEPES
150.0 mMNaClSodium Chloride
GridModel: Quantifoil R1.2/1.3 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 278 K / Instrument: FEI VITROBOT MARK I

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Specialist opticsEnergy filter - Slit width: 20 eV
Image recordingFilm or detector model: FEI FALCON IV (4k x 4k) / Average electron dose: 50.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 2.6 µm / Nominal defocus min: 1.2 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

CTF correctionSoftware - Name: cryoSPARC / Type: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: INSILICO MODEL
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.39 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC / Number images used: 125599
Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC
FSC plot (resolution estimation)

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