Porphyromonas gingivalis transports Arg-gingipains and Lys-gingipain across the outer membrane via an unknown pathway. Recently, we found that the sov gene of P. gingivalis W83 was required for this step. In the present study, we characterized the Sov protein. We constructed a P. gingivalis strain that expresses histidine-tagged Sov instead of Sov. Subcellular fractionations and a histidine-tag pulldown experiment showed that histidine-tagged Sov was present in an outer membrane fraction. Furthermore, antiserum raised against the terminal regions of Sov obstructed the secretion of Arg-gingipains from wild-type W83 cells. A deletion study showed that the region from Phe2495 to the C-terminus Gln2499 of Sov is essential for gingipain secretion. Anti-histidine-tag immunoglobulins interfered with the secretion of Arg-gingipains by P. gingivalis cells that expressed histidine-tagged Sov. In conclusion, we found that Sov is an outer membrane protein participating in the secretion of gingipains and that the C-terminal region of Sov is exposed to the extracellular milieu and involved in the modulation of Sov function.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1111/j.1574-6968.2009.01848.x | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Moxifloxacin-Loaded Polymeric Nanoparticles for Overcoming Multidrug Resistance in Chronic Pulmonary Infections Caused by .
ACS Appl Mater Interfaces
January 2025
School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China.
() infections are increasingly challenging due to their propensity to form biofilms and low outer membrane permeability, especially in chronically infected patients with thick mucus. exhibits multiple drug resistance mechanisms, making it one of the most significant global public health threats. In this study, we found that moxifloxacin (MXC) and antibacterial peptides (ε-poly-l-lysine, ε-PLL) exhibited a synergistic effect against multidrug-resistant (MDR-).
View Article and Find Full Text PDFVisual Performance and Predictive OCT Biomarkers in Epiretinal Membrane Assessment: Beyond Distance Visual Acuity.
Invest Ophthalmol Vis Sci
January 2025
Department of Surgical Sciences, Eye Clinic Section, University of Turin, Turin, Italy.
Purpose: This study aimed to comprehensively assess visual performance in eyes with idiopathic epiretinal membrane (iERM). Additionally, it sought to explore the associations between optical coherence tomography (OCT) imaging biomarkers and visual performance in patients with iERM.
Methods: In this prospective, non-interventional study, 57 participants with treatment-naïve iERM from the University of Turin, between September 2023 and March 2024 were enrolled.
Combating Antibiotic-Resistant Bacterial Infection Using Coassembled Dimeric Antimicrobial Peptide-Based Nanofibers.
ACS Nano
January 2025
College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, P. R. China.
The emergence of multidrug-resistant (MDR) pathogens, coupled with the limited effectiveness of existing antibiotics in eradicating biofilms, presents a significant threat to global health care. This critical situation underscores the urgent need for the discovery and development of antimicrobial agents. Recently, peptide-derived antimicrobial nanomaterials have shown promise in combating such infections.
View Article and Find Full Text PDFCannulae are tubular protein filaments that accumulate on the extracellular surface of the hyperthermophilic archaeon during cell division. Cannulae have been postulated to act as a primitive extracellular matrix through which cells could communicate or exchange material, although their native biological function remains obscure. Here, we report cryoEM structural analyses of cannulae and of protein assemblies derived from recombinant cannula-like proteins.
View Article and Find Full Text PDFNIR Triggered Bionic Bilayer Membrane-Encapsulated Nanoparticles for Synergistic Photodynamic, Photothermal and Chemotherapy of Cervical Cancer.
Int J Nanomedicine
January 2025
State Key Laboratory of Pathogenesis Prevention and Treatment of High Incidence Diseases in Central Asia, School of Medical Engineering and Technology Xinjiang Medical University, Urumqi, 830011, People's Republic of China.
Purpose: A synergistic treatment strategy of phototherapy and chemotherapy has been shown to improve efficacy and offer unique advantages over monotherapy. The purpose of this study is to explore a new nanocarrier system with liposome as the inner membrane and erythrocyte membrane as the outer membrane, which aims to realize the leak-free load of phototherapy drug indocyanine green (ICG) and chemotherapy drug doxorubicin (DOX), prolong the circulation time in vivo and improve the therapeutic effect.
Patients And Methods: In this study, bilayer membrane-loaded ICG and DOX nanoparticles (RBC@ICG-DOX NPs) were prepared and characterized.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!