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: csgFb1038JW1021
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: csgGb1037JW1020
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

View Full Validation Report




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