6SI7

Structure of the curli secretion-assembly complex CsgG:CsgF

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.40 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history. 


Literature

A dual-constriction biological nanopore resolves homonucleotide sequences with high fidelity.

Van der Verren, S.E., Van Gerven, N., Jonckheere, W., Hambley, R., Singh, P., Kilgour, J., Jordan, M., Wallace, E.J., Jayasinghe, L., Remaut, H.

(2020) Nat Biotechnol 38: 1415-1420

  • DOI: 10.1038/s41587-020-0570-8
  • Primary Citation of Related Structures:  
    6SI7

  • PubMed Abstract: 

    • Single-molecule long-read DNA sequencing with biological nanopores is fast and high-throughput but suffers reduced accuracy in homonucleotide stretches. We now combine the CsgG nanopore with the 35-residue N-terminal region of its extracellular interaction partner CsgF to produce a dual-constriction pore with improved signal and base-calling accuracy for homopolymer regions ...

    Single-molecule long-read DNA sequencing with biological nanopores is fast and high-throughput but suffers reduced accuracy in homonucleotide stretches. We now combine the CsgG nanopore with the 35-residue N-terminal region of its extracellular interaction partner CsgF to produce a dual-constriction pore with improved signal and base-calling accuracy for homopolymer regions. The electron cryo-microscopy structure of CsgG in complex with full-length CsgF shows that the 33 N-terminal residues of CsgF bind inside the β-barrel of the pore, forming a defined second constriction. In complexes of CsgG bound to a 35-residue CsgF constriction peptide, the second constriction is separated from the primary constriction by ~25 Å. We find that both constrictions contribute to electrical signal modulation during single-stranded DNA translocation. DNA sequencing using a prototype CsgG-CsgF protein pore with two constrictions improved single-read accuracy by 25 to 70% in homopolymers up to 9 nucleotides long.

    Organizational Affiliation: 

    Structural and Molecular Microbiology, VIB-VUB Center for Structural Biology, VIB, Brussels, Belgium. han.remaut@vub.be.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Curli production assembly/transport component CsgF125Escherichia coliMutation(s): 0 
Gene Names: csgF, b1038, JW1021
Membrane Entity: Yes 
UniProt
Find proteins for P0AE98 (Escherichia coli (strain K12))
Explore P0AE98 
Go to UniProtKB:  P0AE98
Protein Feature View
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  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Curli production assembly/transport component CsgG272Escherichia coliMutation(s): 0 
Gene Names: csgG, b1037, JW1020
Membrane Entity: Yes 
UniProt
Find proteins for P0AEA2 (Escherichia coli (strain K12))
Explore P0AEA2 
Go to UniProtKB:  P0AEA2
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.40 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
European Research CouncilBelgium649082
Research Foundation - FlandersBelgium--

Revision History  (Full details and data files)

  • Version 1.0: 2020-06-24
    Type: Initial release
  • Version 1.1: 2020-07-15
    Changes: Database references
  • Version 1.2: 2020-11-18
    Changes: Structure summary
  • Version 1.3: 2020-12-16
    Changes: Database references