Periscope Proteins are variable-length regulators of bacterial cell surface interactions.
Proc Natl Acad Sci U S A
; 118(23)2021 06 08.
Article
em En
| MEDLINE
| ID: mdl-34074781
ABSTRACT
Changes at the cell surface enable bacteria to survive in dynamic environments, such as diverse niches of the human host. Here, we reveal "Periscope Proteins" as a widespread mechanism of bacterial surface alteration mediated through protein length variation. Tandem arrays of highly similar folded domains can form an elongated rod-like structure; thus, variation in the number of domains determines how far an N-terminal host ligand binding domain projects from the cell surface. Supported by newly available long-read genome sequencing data, we propose that this class could contain over 50 distinct proteins, including those implicated in host colonization and biofilm formation by human pathogens. In large multidomain proteins, sequence divergence between adjacent domains appears to reduce interdomain misfolding. Periscope Proteins break this "rule," suggesting that their length variability plays an important role in regulating bacterial interactions with host surfaces, other bacteria, and the immune system.
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Base de dados:
MEDLINE
Assunto principal:
Proteínas de Bactérias
/
Streptococcus gordonii
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Proteínas de Membrana
Idioma:
En
Ano de publicação:
2021
Tipo de documento:
Article