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- PDB-7php: Structure of Multidrug and Toxin Compound Extrusion (MATE) transp... -
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Open data
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Basic information
Entry | Database: PDB / ID: 7php | ||||||
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Title | Structure of Multidrug and Toxin Compound Extrusion (MATE) transporter NorM by NabFab-fiducial assisted cryo-EM | ||||||
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![]() | MEMBRANE PROTEIN / NabFab / anti-nanobody Fab / fiducial / NorM / MATE | ||||||
Function / homology | Multi antimicrobial extrusion protein / MatE / antiporter activity / xenobiotic transmembrane transporter activity / membrane => GO:0016020 / Multidrug resistance protein NorM![]() | ||||||
Biological species | ![]() synthetic construct (others) ![]() ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.47 Å | ||||||
![]() | Bloch, J.S. / Mukherjee, S. / Kowal, J. / Niederer, M. / Pardon, E. / Steyaert, J. / Kossiakoff, A.A. / Locher, K.P. | ||||||
Funding support | ![]()
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![]() | ![]() Title: Development of a universal nanobody-binding Fab module for fiducial-assisted cryo-EM studies of membrane proteins. Authors: Joël S Bloch / Somnath Mukherjee / Julia Kowal / Ekaterina V Filippova / Martina Niederer / Els Pardon / Jan Steyaert / Anthony A Kossiakoff / Kaspar P Locher / ![]() ![]() ![]() Abstract: With conformation-specific nanobodies being used for a wide range of structural, biochemical, and cell biological applications, there is a demand for antigen-binding fragments (Fabs) that ...With conformation-specific nanobodies being used for a wide range of structural, biochemical, and cell biological applications, there is a demand for antigen-binding fragments (Fabs) that specifically and tightly bind these nanobodies without disturbing the nanobody-target protein interaction. Here, we describe the development of a synthetic Fab (termed NabFab) that binds the scaffold of an alpaca-derived nanobody with picomolar affinity. We demonstrate that upon complementary-determining region grafting onto this parent nanobody scaffold, nanobodies recognizing diverse target proteins and derived from llama or camel can cross-react with NabFab without loss of affinity. Using NabFab as a fiducial and size enhancer (50 kDa), we determined the high-resolution cryogenic electron microscopy (cryo-EM) structures of nanobody-bound VcNorM and ScaDMT, both small membrane proteins of ∼50 kDa. Using an additional anti-Fab nanobody further facilitated reliable initial three-dimensional structure determination from small cryo-EM test datasets. Given that NabFab is of synthetic origin, is humanized, and can be conveniently expressed in in large amounts, it may be useful not only for structural biology but also for biomedical applications. #1: ![]() Title: Development of a universal nanobody-binding Fab module for fiducial-assisted cryo-EM studies of membrane proteins Authors: Bloch, J.S. / Mukherjee, S. / Kowal, J. / Filippova, E.V. / Niederer, M. / Pardon, E. / Steyaert, J. / Kossiakoff, A.A. / Locher, K.P. | ||||||
History |
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Structure visualization
Movie |
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Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 200.8 KB | Display | ![]() |
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PDB format | ![]() | 161.8 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 13424MC ![]() 7phqC ![]() 7pijC ![]() 7rthC M: map data used to model this data C: citing same article ( |
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Similar structure data |
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Links
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Assembly
Deposited unit | ![]()
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Components
-Antibody , 4 types, 4 molecules HLNK
#2: Antibody | Mass: 25684.463 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) synthetic construct (others) / Production host: ![]() ![]() |
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#3: Antibody | Mass: 23258.783 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) synthetic construct (others) / Production host: ![]() ![]() |
#4: Antibody | Mass: 14356.979 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) synthetic construct (others) / Production host: ![]() ![]() |
#5: Antibody | Mass: 13390.644 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() |
-Protein / Non-polymers , 2 types, 22 molecules A![](data/chem/img/HOH.gif)
![](data/chem/img/HOH.gif)
#1: Protein | Mass: 52462.109 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() |
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#6: Water | ChemComp-HOH / |
-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
Component | Name: Complex of vibrio cholerae MATE transporter NorM, chimeric nanobody NorM-Nb17_4, NabFab, and anti-Fab nanobody Type: COMPLEX / Entity ID: #1-#5 / Source: MULTIPLE SOURCES | ||||||||||||||||||||||||
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Molecular weight | Experimental value: NO | ||||||||||||||||||||||||
Source (natural) |
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Source (recombinant) | Organism: ![]() ![]() | ||||||||||||||||||||||||
Buffer solution | pH: 7.5 | ||||||||||||||||||||||||
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES | ||||||||||||||||||||||||
Vitrification | Cryogen name: ETHANE-PROPANE |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD |
Image recording | Electron dose: 26 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) |
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Processing
Software | Name: PHENIX / Version: 1.18.2_3874: / Classification: refinement | ||||||||||||||||||||||||
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
3D reconstruction | Resolution: 3.47 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 433995 / Symmetry type: POINT | ||||||||||||||||||||||||
Refine LS restraints |
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