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PXD046119-1

PXD046119 is an original dataset announced via ProteomeXchange.

Dataset Summary
TitleCryo-EM structures of type IV pili complexed with nanobodies reveal immune escape mechanisms
DescriptionType IV pili (T4P) are prevalent, polymeric surface structures in pathogenic bacteria, making them ideal targets for effective vaccines. However, bacteria have evolved efficient strategies to evade type IV pili-directed antibody responses. Neisseria meningitidis are prototypical type IV pili-expressing Gram-negative bacteria responsible for life threatening sepsis and meningitis. This species has evolved several genetic strategies to modify the surface of its type IV pili based on recombination, phase variation and the presence of different alleles of genes involved in posttranslational modifications. This results in changes in pilin subunit amino acid sequence, nature of glycosylation and phosphoform modification, but how these different processes affect antibody binding at the structural level is still unknown. To explore this question, we provide cryo-electron microscopy structures of pili of different sequence types with sufficiently high resolution to visualize posttranslational modifications. We then generated nanobodies directed against type IV pili which alter pilus function in vitro and vivo; and determined their structures complexed with their pilus target. We also determined how the different types of pili surface modifications alter nanobody binding. These different structures shed light on the impressive complementarity between the different strategies used by bacteria to avoid antibody binding. Importantly, we also show that structural information can be used to make informed modifications in nanobodies as countermeasures to these immune evasion mechanisms.
HostingRepositoryPRIDE
AnnounceDate2024-10-07
AnnouncementXMLSubmission_2024-10-07_13:50:56.318.xml
DigitalObjectIdentifier
ReviewLevelPeer-reviewed dataset
DatasetOriginOriginal dataset
RepositorySupportUnsupported dataset by repository
PrimarySubmitterMartial Rey
SpeciesList scientific name: Neisseria meningitidis; NCBI TaxID: 487;
ModificationListmono-N-acetylaminoglucosylated residue; acetylated residue; O-(2-acetamido-4-glyceramido-2,4,6-trideoxy-D-glucosyl)-L-serine; hexosylated residue
InstrumentOrbitrap Eclipse; Q Exactive HF
Dataset History
RevisionDatetimeStatusChangeLog Entry
02023-10-13 06:17:11ID requested
12024-10-07 13:50:56announced
Publication List
Dataset with its publication pending
Keyword List
submitter keyword: Pili, Neisseria meningitidis
Contact List
Julia Chamot-Rooke
contact affiliationInstitut Pasteur, Université Paris-Cité, CNRS, UAR 2024, Mass Spectrometry for Biology, 75015 PARIS
contact emailjulia.chamot-rooke@pasteur.fr
lab head
Martial Rey
contact affiliationCNRS, Pasteur
contact emailmartial.rey@pasteur.fr
dataset submitter
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