期刊
FEBS LETTERS
卷 586, 期 1, 页码 1-6出版社
WILEY
DOI: 10.1016/j.febslet.2011.10.047
关键词
FadA; Adhesin; Signal peptide; Filament; Mutant; Adherence; Invasion; Fusobacterium nucleatum
资金
- National Institute of Dental and Craniofacial Research [RO1 DE14924, R21 DE17165, KO2 DE 16102]
FadA, a novel adhesin of periodontal pathogen Fusobacterium nucleatum is composed of two forms, pre-FadA and mature FadA (mFadA), constituting the functional FadA complex (FadAc). By electron microscopy, we observed that mFadA formed uniformly long and thin filaments, while FadAc formed heterogeneous filaments of varying lengths and widths, as well as knots. Mutants in signal peptide or in the non-alpha-helical loop retaining heterogeneous structures had binding activity while those forming aggregates or long filaments lost activity. These observations suggest short filaments and knots may be the active forms of FadA. This is the first demonstration that a signal peptide is required for the assembly of a bacterial adhesin. Structured summary of protein interactions: mFadA and pre-FadA interaction by transmission electron microscopy (View interaction) (C) 2011 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.
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