» Articles » PMID: 25023245

Lack of a Surface Layer in Tannerella Forsythia Mutants Deficient in the Type IX Secretion System

Overview
Specialty Microbiology
Date 2014 Jul 16
PMID 25023245
Citations 35
Authors
Affiliations
Soon will be listed here.
Abstract

Tannerella forsythia, a Gram-negative anaerobic bacterium, is an important pathogen in periodontal disease. This bacterium possesses genes encoding all known components of the type IX secretion system (T9SS). T. forsythia mutants deficient in genes orthologous to the T9SS-encoding genes porK, porT and sov were constructed. All porK, porT and sov single mutants lacked the surface layer (S-layer) and expressed less-glycosylated versions of the S-layer glycoproteins TfsA and TfsB. In addition, these mutants exhibited decreased haemagglutination and increased biofilm formation. Comparison of the proteins secreted by the porK and WT strains revealed that the secretion of several proteins containing C-terminal domain (CTD)-like sequences is dependent on the porK gene. These results indicate that the T9SS is functional in T. forsythia and contributes to the translocation of CTD proteins to the cell surface or into the extracellular milieu.

Citing Articles

The type IX secretion system: Insights into its function and connection to glycosylation in .

Song W, Zhuang X, Tan Y, Qi Q, Lu X Eng Microbiol. 2024; 2(3):100038.

PMID: 39629027 PMC: 11611037. DOI: 10.1016/j.engmic.2022.100038.


Identification of nanaomycin A and its analogs by a newly established screening method for functional inhibitors of the type IX secretion system in Porphyromonas gingivalis.

Sasaki Y, Matsuo T, Watanabe Y, Iwatsuki M, Inahashi Y, Nishida S J Antibiot (Tokyo). 2024; 78(2):90-105.

PMID: 39578618 DOI: 10.1038/s41429-024-00790-8.


Ecological, beneficial, and pathogenic functions of the Type 9 Secretion System.

Rocha S, Shah D, Shrivastava A Microb Biotechnol. 2024; 17(6):e14516.

PMID: 38924452 PMC: 11205867. DOI: 10.1111/1751-7915.14516.


Structural and functional insights into the C-terminal signal domain of the Bacteroidetes type-IX secretion system.

Mizgalska D, Rodriguez-Banqueri A, Veillard F, Ksiazek M, Goulas T, Guevara T Open Biol. 2024; 14(6):230448.

PMID: 38862016 PMC: 11285876. DOI: 10.1098/rsob.230448.


Screening and characterization of aptamers recognizing the periodontal pathogen Tannerella forsythia.

Mizgalska D, Malicki S, Golda A, Chruscicka-Smaga B, Potempa J FEBS Open Bio. 2024; 14(3):498-504.

PMID: 38308430 PMC: 10909966. DOI: 10.1002/2211-5463.13772.


References
1.
Potempa J, Sroka A, Imamura T, Travis J . Gingipains, the major cysteine proteinases and virulence factors of Porphyromonas gingivalis: structure, function and assembly of multidomain protein complexes. Curr Protein Pept Sci. 2003; 4(6):397-407. DOI: 10.2174/1389203033487036. View

2.
Veith P, OBrien-Simpson N, Tan Y, Djatmiko D, Dashper S, Reynolds E . Outer membrane proteome and antigens of Tannerella forsythia. J Proteome Res. 2009; 8(9):4279-92. DOI: 10.1021/pr900372c. View

3.
Chagnot C, Zorgani M, Astruc T, Desvaux M . Proteinaceous determinants of surface colonization in bacteria: bacterial adhesion and biofilm formation from a protein secretion perspective. Front Microbiol. 2013; 4:303. PMC: 3796261. DOI: 10.3389/fmicb.2013.00303. View

4.
Sharma A . Virulence mechanisms of Tannerella forsythia. Periodontol 2000. 2010; 54(1):106-16. PMC: 2934765. DOI: 10.1111/j.1600-0757.2009.00332.x. View

5.
Takemoto T, Kurihara H, Dahlen G . Characterization of Bacteroides forsythus isolates. J Clin Microbiol. 1997; 35(6):1378-81. PMC: 229752. DOI: 10.1128/jcm.35.6.1378-1381.1997. View