Nejvíce citovaný článek - PubMed ID 11500424
Neisseria meningitidis RTX protein FrpC induces high levels of serum antibodies during invasive disease: polymorphism of frpC alleles and purification of recombinant FrpC
The iron-regulated protein FrpD from Neisseria meningitidis is an outer membrane lipoprotein that interacts with very high affinity (Kd ~ 0.2 nM) with the N-terminal domain of FrpC, a Type I-secreted protein from the Repeat in ToXin (RTX) protein family. In the presence of Ca2+, FrpC undergoes Ca2+ -dependent protein trans-splicing that includes an autocatalytic cleavage of the Asp414-Pro415 peptide bond and formation of an Asp414-Lys isopeptide bond. Here, we report the high-resolution structure of FrpD and describe the structure-function relationships underlying the interaction between FrpD and FrpC1-414. We identified FrpD residues involved in FrpC1-414 binding, which enabled localization of FrpD within the low-resolution SAXS model of the FrpD-FrpC1-414 complex. Moreover, the trans-splicing activity of FrpC resulted in covalent linkage of the FrpC1-414 fragment to plasma membrane proteins of epithelial cells in vitro, suggesting that formation of the FrpD-FrpC1-414 complex may be involved in the interaction of meningococci with the host cell surface.
- MeSH
- bakteriální proteiny chemie genetika MeSH
- buněčná adheze genetika MeSH
- difrakce rentgenového záření MeSH
- lidé MeSH
- lipoproteiny chemie metabolismus MeSH
- membránové proteiny chemie genetika MeSH
- Neisseria meningitidis chemie genetika MeSH
- periplazmatické vazebné proteiny chemie metabolismus MeSH
- proteiny vázající železo chemie metabolismus MeSH
- proteiny vnější bakteriální membrány metabolismus MeSH
- sekvence aminokyselin genetika MeSH
- železo chemie metabolismus MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Názvy látek
- bakteriální proteiny MeSH
- frpC protein, Neisseria meningitidis MeSH Prohlížeč
- lipoproteiny MeSH
- membránové proteiny MeSH
- periplazmatické vazebné proteiny MeSH
- proteiny vázající železo MeSH
- proteiny vnější bakteriální membrány MeSH
- železo MeSH
This review summarizes the main results obtained in the fields of general and molecular microbiology and microbial genetics at the Institute of Microbiology of the Academy of Sciences of the Czech Republic (AS CR) [formerly Czechoslovak Academy of Sciences (CAS)] over more than 50 years. Contribution of the founder of the Institute, academician Ivan Málek, to the introduction of these topics into the scientific program of the Institute of Microbiology and to further development of these studies is also included.
- MeSH
- akademie a ústavy dějiny MeSH
- dějiny 20. století MeSH
- mikrobiální genetika dějiny MeSH
- molekulární biologie dějiny MeSH
- Check Tag
- dějiny 20. století MeSH
- Publikační typ
- časopisecké články MeSH
- historické články MeSH
- práce podpořená grantem MeSH
- přehledy MeSH
- Geografické názvy
- Česká republika MeSH
Repeats-in-toxin (RTX) exoproteins of Gram-negative bacteria form a steadily growing family of proteins with diverse biological functions. Their common feature is the unique mode of export across the bacterial envelope via the type I secretion system and the characteristic, typically nonapeptide, glycine- and aspartate-rich repeats binding Ca(2+) ions. In this review, we summarize the current state of knowledge on the organization of rtx loci and on the biological and biochemical activities of therein encoded proteins. Applying several types of bioinformatic screens on the steadily growing set of sequenced bacterial genomes, over 1000 RTX family members were detected, with the biological functions of most of them remaining to be characterized. Activities of the so far characterized RTX family members are then discussed and classified according to functional categories, ranging from the historically first characterized pore-forming RTX leukotoxins, through the large multifunctional enzymatic toxins, bacteriocins, nodulation proteins, surface layer proteins, up to secreted hydrolytic enzymes exhibiting metalloprotease or lipase activities of industrial interest.
- MeSH
- aminokyselinové motivy MeSH
- bakteriální proteiny chemie genetika metabolismus MeSH
- bakteriální toxiny chemie genetika metabolismus MeSH
- gramnegativní bakterie chemie genetika metabolismus MeSH
- multigenová rodina * MeSH
- regulace genové exprese u bakterií MeSH
- transport proteinů MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- přehledy MeSH
- Názvy látek
- bakteriální proteiny MeSH
- bakteriální toxiny MeSH
Fe-regulated protein D (FrpD) is a Neisseria meningitidis outer membrane lipoprotein that may be involved in the anchoring of the secreted repeat in toxins (RTX) protein FrpC to the outer bacterial membrane. However, the function and biological roles of the FrpD and FrpC proteins remain unknown. Native and selenomethionine-substituted variants of recombinant FrpD43-271 protein were crystallized using the sitting-drop vapour-diffusion method. Diffraction data were collected to a resolution of 2.25 A for native FrpD43-271 protein and to a resolution of 2.00 A for selenomethionine-substituted FrpD43-271 (SeMet FrpD43-271) protein. The crystals of native FrpD43-271 protein belonged to the hexagonal space group P6(2) or P6(4), while the crystals of SeMet FrpD43-271 protein belonged to the primitive orthorhombic space group P2(1)2(1)2(1).
- MeSH
- krystalizace MeSH
- krystalografie rentgenová MeSH
- lipoproteiny chemie MeSH
- Neisseria meningitidis chemie MeSH
- proteiny vnější bakteriální membrány chemie MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Názvy látek
- lipoproteiny MeSH
- proteiny vnější bakteriální membrány MeSH
RTX cytotoxins play an important role in virulence of numerous gram-negative pathogens. Unexpectedly, however, we show here that the RTX proteins of Neisseria meningitidis are dispensable for virulence in the infant rat model of infection.
- MeSH
- bakteriální proteiny genetika metabolismus MeSH
- bakteriemie mikrobiologie mortalita MeSH
- cévní endotel cytologie mikrobiologie MeSH
- cytotoxiny genetika metabolismus MeSH
- krysa rodu Rattus MeSH
- membránové proteiny genetika metabolismus MeSH
- meningokokové infekce mikrobiologie mortalita MeSH
- mutace MeSH
- Neisseria meningitidis metabolismus patogenita MeSH
- novorozená zvířata * MeSH
- potkani inbrední LEW MeSH
- virulence MeSH
- zvířata MeSH
- Check Tag
- krysa rodu Rattus MeSH
- ženské pohlaví MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Názvy látek
- bakteriální proteiny MeSH
- cytotoxiny MeSH
- frpC protein, Neisseria meningitidis MeSH Prohlížeč
- membránové proteiny MeSH