1
|
Zdorovenko EL, Dmitrenok AS, Masi M, Castaldi S, Muzio FM, Isticato R, Valverde C, Knirel YA, Evidente A. Structural studies on the O-specific polysaccharide of the lipopolysaccharide from Pseudomonas donghuensis strain SVBP6, with antifungal activity against the phytopathogenic fungus Macrophomina phaseolina. Int J Biol Macromol 2021; 182:2019-2023. [PMID: 34081955 DOI: 10.1016/j.ijbiomac.2021.05.187] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 04/30/2021] [Accepted: 05/26/2021] [Indexed: 12/27/2022]
Abstract
An O-specific polysaccharide (OPS) was isolated from the lipopolysaccharide (LPS) of Pseudomonas donghuensis SVBP6, a bacterium with a broad-spectrum antifungal activity in vitro, particularly that against Macrophomina phaseolina. This latter is one of the most virulent and dangerous pathogens of plants, including soybean which is an economically important crop in Argentina today. The OPS was studied by sugar analysis and spectroscopy (1D and 2D 1H and 13C NMR) showing the following trisaccharide repeating unit: →6)-ɑ-D-ManpNAc-(1 → 3)-β-l-Rhap-(1 → 4)-β-D-Glcp-(1→. The crude LPS, the purified LPS and the O-chain were assayed for their antifungal activity against M. phaseolina at 25, 50, 100, and 200 μg plug-1. The results showed that the crude LPS best inhibition was at 200 μg plug-1, able to inhibit the fungus growth by about 45%, while purified LPS and the corresponding OPS, in the same condition, reduced fungus growth by 65%, and 75%, respectively. Furthermore, the purified LPS and OPS significantly reduced the growth of M. phaseolina already at 100 μg plug-1 compared to the crude LPS. The structure of the O-chain is unique among the bacterial LPS and this is the first time that both the antifungal activity of a bacterial LPS and its corresponding O-chain were described.
Collapse
Affiliation(s)
- Evelina L Zdorovenko
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospekt 47, 119991 Moscow, Russia
| | - Andrey S Dmitrenok
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospekt 47, 119991 Moscow, Russia
| | - Marco Masi
- Department of Chemical Sciences, University of Naples Federico II, Complesso Universitario Monte S. Angelo, Via Cintia 4, 80126 Naples, Italy
| | - Stefany Castaldi
- Department of Biology, University of Naples Federico II, Complesso Universitario Monte S. Angelo, Via Cintia 4, 80126 Naples, Italy
| | - Federico M Muzio
- Laboratorio de Fisiología y Genética de Bacterias Beneficiosas para Plantas-Centro de Bioquímica y Microbiología del Suelo, Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes-CONICET, Buenos Aires, Argentina
| | - Rachele Isticato
- Department of Biology, University of Naples Federico II, Complesso Universitario Monte S. Angelo, Via Cintia 4, 80126 Naples, Italy
| | - Claudio Valverde
- Laboratorio de Fisiología y Genética de Bacterias Beneficiosas para Plantas-Centro de Bioquímica y Microbiología del Suelo, Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes-CONICET, Buenos Aires, Argentina
| | - Yuriy A Knirel
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospekt 47, 119991 Moscow, Russia
| | - Antonio Evidente
- Department of Chemical Sciences, University of Naples Federico II, Complesso Universitario Monte S. Angelo, Via Cintia 4, 80126 Naples, Italy.
| |
Collapse
|
2
|
Shashkov AS, Zhang Y, Sun Q, Guo X, Senchenkova SN, Perepelov AV, Knirel YA. Structure and gene cluster of the O-antigen of Escherichia coli O133. Carbohydr Res 2016; 430:82-84. [PMID: 27203746 DOI: 10.1016/j.carres.2016.04.028] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2016] [Accepted: 04/29/2016] [Indexed: 10/21/2022]
Abstract
The O-specific polysaccharide (O-antigen) of Escherichia coli O133 was obtained by mild acid hydrolysis of the lipopolysaccharide of E. coli O133. The structure of the hexasaccharide repeating unit of the polysaccharide was elucidated by (1)H and (13)C NMR spectroscopy, including a two-dimensional (1)H-(1)H ROESY experiment: Functions of genes in the O-antigen gene cluster were putatively identified by comparison with sequences in the available databases and, particularly, an encoded predicted multifunctional glycosyltransferase was assigned to three α-l-rhamnosidic linkages.
Collapse
Affiliation(s)
- Alexander S Shashkov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russian Federation
| | - Yuanyuan Zhang
- TEDA Institute of Biological Sciences and Biotechnology, Nankai University, TEDA, 300457 Tianjin, China
| | - Qiangzheng Sun
- State Key Laboratory for Infectious Disease Prevention and Control, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, National Institute for Communicable Disease Control and Prevention, China
| | - Xi Guo
- TEDA Institute of Biological Sciences and Biotechnology, Nankai University, TEDA, 300457 Tianjin, China
| | - Sof'ya N Senchenkova
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russian Federation
| | - Andrei V Perepelov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russian Federation.
| | - Yuriy A Knirel
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russian Federation
| |
Collapse
|