+検索条件
-Structure paper
| タイトル | A dual-constriction biological nanopore resolves homonucleotide sequences with high fidelity. |
|---|---|
| ジャーナル・号・ページ | Nat Biotechnol, Vol. 38, Issue 12, Page 1415-1420, Year 2020 |
| 掲載日 | 2020年7月6日 |
著者 | Sander E Van der Verren / Nani Van Gerven / Wim Jonckheere / Richard Hambley / Pratik Singh / John Kilgour / Michael Jordan / E Jayne Wallace / Lakmal Jayasinghe / Han Remaut / ![]() |
| PubMed 要旨 | 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- ...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. |
リンク | Nat Biotechnol / PubMed:32632300 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 3.4 Å |
| 構造データ | EMDB-10206, PDB-6si7: |
| 由来 |
|
キーワード | PROTEIN TRANSPORT / Secretion Channel / Curli / Outer Membrane Protein / Nanopore Sensing / Bacterial amyloid |
ムービー
コントローラー
構造ビューア
万見文献について



著者

リンク


キーワード