8U2B

Cryo-EM structure of C.crescentus bNY30a pilus complex

Summary for 8U2B

• Entry DOI: 10.2210/pdb8u2b/pdb
• EMDB information: 41844
• Descriptor: Flp family type IVb pilin (1 entity in total)
• Functional Keywords: complex, protein fibril
• Biological source: Caulobacter vibrioides
• Total number of polymer chains: 37
• Total formula weight: 162028.18

Authors

Wang, Y.,Zhang, J. (deposition date: 2023-09-05, release date: 2024-05-15, Last modification date: 2024-07-17)

Primary citation

Wang, Y.,Theodore, M.,Xing, Z.,Narsaria, U.,Yu, Z.,Zeng, L.,Zhang, J.
Structural mechanisms of Tad pilus assembly and its interaction with an RNA virus.
Sci Adv, 10:eadl4450-eadl4450, 2024

PubMed Abstract: Tad (tight adherence) pili, part of the type IV pili family, are crucial for mechanosensing, surface adherence, bacteriophage (phage) adsorption, and cell-cycle regulation. Unlike other type IV pilins, Tad pilins lack the typical globular β sheet domain responsible for pilus assembly and phage binding. The mechanisms of Tad pilus assembly and its interaction with phage ΦCb5 have been elusive. Using cryo-electron microscopy, we unveiled the Tad pilus assembly mechanism, featuring a unique network of hydrogen bonds at its core. We then identified the Tad pilus binding to the ΦCb5 maturation protein (Mat) through its β region. Notably, the amino terminus of ΦCb5 Mat is exposed outside the capsid and phage/pilus interface, enabling the attachment of fluorescent and affinity tags. These engineered ΦCb5 virions can be efficiently assembled and purified in , maintaining infectivity against , which presents promising applications, including RNA delivery and phage display.

PubMed: 38701202
DOI: 10.1126/sciadv.adl4450

Experimental method

ELECTRON MICROSCOPY (2.8 Å)