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Yorodumi- EMDB-43211: Constituent map: Focused refinement of Nav1.7 in complex of Nav1.... -
+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-43211 | |||||||||
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Title | Constituent map: Focused refinement of Nav1.7 in complex of Nav1.7 and Fab 7A9.4DS | |||||||||
Map data | ||||||||||
Sample |
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Keywords | antibody fragment / fab / protein engineering / ion channel / TRANSPORT PROTEIN | |||||||||
Biological species | Aliarcobacter butzleri RM4018 (bacteria) / Mus musculus (house mouse) | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 2.5 Å | |||||||||
Authors | Kung JE / Jao CC / Arthur CP / Sudhamsu J | |||||||||
Funding support | 1 items
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Citation | Journal: bioRxiv / Year: 2024 Title: Disulfi de constrained Fabs overcome target size limitation for high-resolution single-particle cryo-EM. Authors: Jennifer E Kung / Matthew C Johnson / Christine C Jao / Christopher P Arthur / Dimitry Tegunov / Alexis Rohou / Jawahar Sudhamsu / Abstract: High-resolution structures of proteins are critical to understanding molecular mechanisms of biological processes and in the discovery of therapeutic molecules. Cryo-EM has revolutionized structure ...High-resolution structures of proteins are critical to understanding molecular mechanisms of biological processes and in the discovery of therapeutic molecules. Cryo-EM has revolutionized structure determination of large proteins and their complexes, but a vast majority of proteins that underlie human diseases are small (< 50 kDa) and usually beyond its reach due to low signal-to-noise images and difficulties in particle alignment. Current strategies to overcome this problem increase the overall size of small protein targets using scaffold proteins that bind to the target, but are limited by inherent flexibility and not being bound to their targets in a rigid manner, resulting in the target being poorly resolved compared to the scaffolds. Here we present an iteratively engineered molecular design for transforming Fabs (antibody fragments), into conformationally rigid scaffolds (Rigid-Fabs) that, when bound to small proteins (~20 kDa), can enable high-resolution structure determination using cryo-EM. This design introduces multiple disulfide bonds at strategic locations, generates a well-folded Fab constrained into a rigid conformation and can be applied to Fabs from various species, isotypes and chimeric Fabs. We present examples of the Rigid Fab design enabling high-resolution (2.3-2.5 Å) structures of small proteins, Ang2 (26 kDa) and KRAS (21 kDa) by cryo-EM. The strategies for designing disulfide constrained Rigid Fabs in our work thus establish a general approach to overcome the target size limitation of single particle cryo-EM. | |||||||||
History |
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-Structure visualization
Supplemental images |
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-Downloads & links
-EMDB archive
Map data | emd_43211.map.gz | 122.8 MB | EMDB map data format | |
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Header (meta data) | emd-43211-v30.xml emd-43211.xml | 21.3 KB 21.3 KB | Display Display | EMDB header |
Images | emd_43211.png | 22.5 KB | ||
Masks | emd_43211_msk_1.map | 244.1 MB | Mask map | |
Filedesc metadata | emd-43211.cif.gz | 5.9 KB | ||
Others | emd_43211_half_map_1.map.gz emd_43211_half_map_2.map.gz | 226.5 MB 226.5 MB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-43211 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-43211 | HTTPS FTP |
-Validation report
Summary document | emd_43211_validation.pdf.gz | 907.7 KB | Display | EMDB validaton report |
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Full document | emd_43211_full_validation.pdf.gz | 907.2 KB | Display | |
Data in XML | emd_43211_validation.xml.gz | 15.9 KB | Display | |
Data in CIF | emd_43211_validation.cif.gz | 18.9 KB | Display | |
Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-43211 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-43211 | HTTPS FTP |
-Related structure data
Related structure data | 8vegC 8vgeC 8vgfC 8vggC 8vghC 8vgiC 8vgjC 8vgkC 8vglC 8vgmC 8vgnC 8vgoC 8vgpC 8vgqC C: citing same article (ref.) |
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-Links
EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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-Map
File | Download / File: emd_43211.map.gz / Format: CCP4 / Size: 244.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 0.9357 Å | ||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Mask #1
File | emd_43211_msk_1.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Half map: #2
File | emd_43211_half_map_1.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Half map: #1
File | emd_43211_half_map_2.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Sample components
-Entire : Nav1.7 in complex with Fab 7A9.4DS
Entire | Name: Nav1.7 in complex with Fab 7A9.4DS |
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Components |
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-Supramolecule #1: Nav1.7 in complex with Fab 7A9.4DS
Supramolecule | Name: Nav1.7 in complex with Fab 7A9.4DS / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all |
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Source (natural) | Organism: Aliarcobacter butzleri RM4018 (bacteria) |
-Supramolecule #2: Nav1.7
Supramolecule | Name: Nav1.7 / type: complex / ID: 2 / Parent: 1 / Macromolecule list: #1 |
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Source (natural) | Organism: Aliarcobacter butzleri RM4018 (bacteria) |
-Supramolecule #3: anti-Nav1.7 Fab 7A9.4DS
Supramolecule | Name: anti-Nav1.7 Fab 7A9.4DS / type: complex / ID: 3 / Parent: 1 / Macromolecule list: #2-#3 |
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Source (natural) | Organism: Mus musculus (house mouse) |
-Macromolecule #1: Chimeric Nav1.7/NavAb
Macromolecule | Name: Chimeric Nav1.7/NavAb / type: protein_or_peptide / ID: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: Aliarcobacter butzleri RM4018 (bacteria) |
Recombinant expression | Organism: Trichoplusia ni (cabbage looper) |
Sequence | String: PRGSHMYLRI TNIVESSFFT KFIIYLIVLN MVTMMVEKEG QSQHMTEVLY WINVVFIILF TIEIILRIYV HRISFFKDPW SLFDFVVVI ISIVGMFLAD LIETYFVSPT LFRVIRLARI GRILRLVTAV PQMRKIVSAL ISVIPGMLSV IALMTLFFYI F AIMATQLF ...String: PRGSHMYLRI TNIVESSFFT KFIIYLIVLN MVTMMVEKEG QSQHMTEVLY WINVVFIILF TIEIILRIYV HRISFFKDPW SLFDFVVVI ISIVGMFLAD LIETYFVSPT LFRVIRLARI GRILRLVTAV PQMRKIVSAL ISVIPGMLSV IALMTLFFYI F AIMATQLF GERFPEWFGT LGESFYTLFQ VMTLESWSMG IVRPLMEVYP YAWVFFIPFI FVVTFVMINL VVAIIVDAMA IL NQKEEQH IIDEVQSHED NINNEIIKLR EEIVELKELI KTSLKN |
-Macromolecule #2: Fab 7A9.4DS heavy chain
Macromolecule | Name: Fab 7A9.4DS heavy chain / type: protein_or_peptide / ID: 2 / Enantiomer: LEVO |
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Source (natural) | Organism: Mus musculus (house mouse) |
Recombinant expression | Organism: Cricetulus griseus (Chinese hamster) |
Sequence | String: EVQLVESGGG CVKPGGSLKL SCAASGFTFS NYAMSWVRQT PEKRLEWVAT ISNGGRYTYY PDSVKGRFTI SRDNAKNSLY LQMSSLRSED TAMYYCARHL YRYDVGGALD YWGQGTCVTV SSAKTTAPSV YPLAPVCGDT TGSSVTLGCL VKGYFCECPV TLTWNSGSLS ...String: EVQLVESGGG CVKPGGSLKL SCAASGFTFS NYAMSWVRQT PEKRLEWVAT ISNGGRYTYY PDSVKGRFTI SRDNAKNSLY LQMSSLRSED TAMYYCARHL YRYDVGGALD YWGQGTCVTV SSAKTTAPSV YPLAPVCGDT TGSSVTLGCL VKGYFCECPV TLTWNSGSLS SGVHTFPAVL QSDLYTLSSS VTVTSSTWPS QSITCNVAHP ASSTKVDKKI EPRGPTIKPH HHHHHP |
-Macromolecule #3: Fab 7A9.4DS light chain
Macromolecule | Name: Fab 7A9.4DS light chain / type: protein_or_peptide / ID: 3 / Enantiomer: LEVO |
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Source (natural) | Organism: Mus musculus (house mouse) |
Recombinant expression | Organism: Cricetulus griseus (Chinese hamster) |
Sequence | String: EIVLTQSPAL MAASPGEKVT ITCSVSLSIS SSNLFWYQQK CETSPKPWIY GTSKLASGVP VRFSGSGSGT SYSLTISSME CEDAATYYCQ QWSSHSFTFG GGTKLEIKRA DAAPTVSIFP PSSEQLTSGG ASVVCFLNNF YPKDINVKWK IDGSERQNGV LNSWTCQDSK ...String: EIVLTQSPAL MAASPGEKVT ITCSVSLSIS SSNLFWYQQK CETSPKPWIY GTSKLASGVP VRFSGSGSGT SYSLTISSME CEDAATYYCQ QWSSHSFTFG GGTKLEIKRA DAAPTVSIFP PSSEQLTSGG ASVVCFLNNF YPKDINVKWK IDGSERQNGV LNSWTCQDSK DCTYSMSSTL TLTKDEYERH NSYTCEATHK TSTSPIVKSF NRNEC |
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation
Buffer | pH: 8 Component:
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Grid | Model: Quantifoil R2/2 / Material: GOLD / Mesh: 300 / Support film - Material: CARBON / Support film - topology: HOLEY Details: grid was treated overnight with 4 mM monothiolalkane(C11)PEG6-OH (11-mercaptoundecyl) hexaethyleneglycol then rinsed in ethanol prior to sample application | ||||||||||||
Vitrification | Cryogen name: ETHANE / Instrument: FEI VITROBOT MARK IV |
-Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: FEI FALCON IV (4k x 4k) / Detector mode: COUNTING / Average electron dose: 44.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
Electron optics | C2 aperture diameter: 70.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 1.8 µm / Nominal defocus min: 0.8 µm / Nominal magnification: 165000 |
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
-Image processing
Startup model | Type of model: NONE |
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Final reconstruction | Applied symmetry - Point group: C2 (2 fold cyclic) / Resolution.type: BY AUTHOR / Resolution: 2.5 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC / Number images used: 362778 |
Initial angle assignment | Type: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC |
Final angle assignment | Type: OTHER / Software - Name: cryoSPARC |