Purification of RgpA from external outer membrane vesicles of Porphyromonas gingivalis

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Resumen
Introduction: Purification of native gingipains is challenging because these proteases are frequently associated with the cell surface, which affects yield. This study aimed to purify native Arg-gingipain (RgpA) from Porphyromonas gingivalis Outer Membrane Vesicles (OMV). Methods: Native RgpA was purified from P. gingivalis strain ATCC33277 OMV using a strategy including ultracentrifugation, sonication, and successive anionic and cationic fast protein liquid chromatography (FPLC). The presence and purity of the protease were confirmed by SDS-PAGE and detection of protease activity using fluorogenic substrates. Rat antibodies produced against the unique adhesin hemagglutinin (H1) domain of RgpA (amino acids 719–865) were titrated by ELISA at a 1:100 dilution using whole P. gingivalis lysate as an antigen and western blotting to detect a 75 kDa band corresponding to RgpA. Results: Double anionic-cationic FLPC yielded prominent peaks with evident amidolytic gingipain activity of the appropriate molecular weight, as confirmed by western blotting. The final RgpA yield from 1 L of bacterial culture with colony forming unit (CFU) (Log10) 7.4 ± 0.08/mL was of 12.6% (2 mg/mL), with 3.2 FU/µg of amidolytic activity. Conclusions: This protocol allows purification of native RgpA from OMV that retains protease activity. © 2022 The Authors
Copyright © 2022 The Authors. Published by Elsevier Ltd.. All rights reserved.
Datos de la publicación
- ISSN/ISSNe:
- 1075-9964, 1095-8274
- Tipo:
- Article
- Páginas:
- 102647-102647
- PubMed:
- 36116685
- Enlace a otro recurso:
- www.scopus.com
Anaerobe Academic Press
Citas Recibidas en Web of Science: 2
Citas Recibidas en Scopus: 2
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Keywords
- Adhesins, Bacterial; Animals; Cysteine Endopeptidases; Gingipain Cysteine Endopeptidases; Hemagglutinins; Porphyromonas gingivalis; Rats; gingipain R; adhesin; cysteine proteinase; hemagglutinin; animal experiment; animal model; anion exchange chromatography; Article; bacterium culture; blood sampling; chemiluminescence immunoassay; colony forming unit; enzyme linked immunosorbent assay; external outer membrane vesicle; fast protein liquid chromatography; indirect ELISA; ion exchange chromatography; male; membrane vesicle; molecular weight; nonhuman; polyacrylamide gel electrophoresis; Porphyromonas gingivalis; rat; transmission electron microscopy; ultracentrifugation; ultrasound; Western blotting; animal; chemistry; metabolism
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