and Filamentous Hemagglutinins Are Processed at Different Sites
Overview
Affiliations
Filamentous hemagglutinin (FHA) mediates adherence and plays an important role in lower respiratory tract infections by pathogenic . The mature FHA proteins of (Bp-FHA) and the (Bb-FHA) are generated by processing of the respective FhaB precursors by the autotransporter subtilisin-type protease SphB1. We have used bottom-up proteomics with differential O/O labeling and show that despite high-sequence conservation of the corresponding FhaB segments, the mature Bp-FHA (~ 230 kDa) and Bb-FHA (~ 243 kDa) proteins are processed at different sites of FhaB, after the Ala-2348 and Lys-2479 residues, respectively. Moreover, protease surface accessibility probing by on-column (on-line) digestion of the Bp-FHA and Bb-FHA proteins yielded different peptide patterns, revealing structural differences in the N-terminal and C-terminal domains of the Bp-FHA and Bb-FHA proteins. These data indicate specific structural variations between the highly homologous FHA proteins.
Filamentous Hemagglutinin of Does Not Interact with the β Integrin CD11b/CD18.
Golshani M, Rahman W, Osickova A, Holubova J, Lora J, Balashova N Int J Mol Sci. 2022; 23(20).
PMID: 36293453 PMC: 9604300. DOI: 10.3390/ijms232012598.
Precision Vaccine Development: Cues From Natural Immunity.
Barman S, Soni D, Brook B, Nanishi E, Dowling D Front Immunol. 2022; 12:662218.
PMID: 35222350 PMC: 8866702. DOI: 10.3389/fimmu.2021.662218.