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-Structure paper
Title | Processive dynamics of the usher assembly platform during uropathogenic Escherichia coli P pilus biogenesis. |
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Journal, issue, pages | Nat Commun, Vol. 12, Issue 1, Page 5207, Year 2021 |
Publish date | Sep 1, 2021 |
Authors | Minge Du / Zuanning Yuan / Glenn T Werneburg / Nadine S Henderson / Hemil Chauhan / Amanda Kovach / Gongpu Zhao / Jessica Johl / Huilin Li / David G Thanassi / |
PubMed Abstract | Uropathogenic Escherichia coli assemble surface structures termed pili or fimbriae to initiate infection of the urinary tract. P pili facilitate bacterial colonization of the kidney and ...Uropathogenic Escherichia coli assemble surface structures termed pili or fimbriae to initiate infection of the urinary tract. P pili facilitate bacterial colonization of the kidney and pyelonephritis. P pili are assembled through the conserved chaperone-usher pathway. Much of the structural and functional understanding of the chaperone-usher pathway has been gained through investigations of type 1 pili, which promote binding to the bladder and cystitis. In contrast, the structural basis for P pilus biogenesis at the usher has remained elusive. This is in part due to the flexible and variable-length P pilus tip fiber, creating structural heterogeneity, and difficulties isolating stable P pilus assembly intermediates. Here, we circumvent these hindrances and determine cryo-electron microscopy structures of the activated PapC usher in the process of secreting two- and three-subunit P pilus assembly intermediates, revealing processive steps in P pilus biogenesis and capturing new conformational dynamics of the usher assembly machine. |
External links | Nat Commun / PubMed:34471127 / PubMed Central |
Methods | EM (single particle) |
Resolution | 3.8 - 7.6 Å |
Structure data | EMDB-23339: Cryo-EM map of E. coli P pilus tip assembly intermediate PapC-PapD-PapK-PapG in the first conformation EMDB-23340: Cryo-EM map of E. coli P pilus tip assembly intermediate PapC-PapD-PapK-PapG in the second conformation EMDB-23341: Cryo-EM map of E. coli P pilus tip assembly intermediate PapC-PapD-PapK-PapF-PapG |
Source |
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Keywords | CHAPERONE / Cryo-EM / Uropathogenic Escherichia coli / chaperone-usher / P pilus |