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Di Lorenzo F, Nicolardi S, Marchetti R, Vanacore A, Gallucci N, Duda K, Nieto Fabregat F, Nguyen HNA, Gully D, Saenz J, Giraud E, Paduano L, Molinaro A, D’Errico G, Silipo A. Expanding Knowledge of Methylotrophic Capacity: Structure and Properties of the Rough-Type Lipopolysaccharide from Methylobacterium extorquens and Its Role on Membrane Resistance to Methanol. JACS Au 2023; 3:929-942. [PMID: 37006758 PMCID: PMC10052234 DOI: 10.1021/jacsau.3c00025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 02/11/2023] [Accepted: 02/15/2023] [Indexed: 06/19/2023]
Abstract
The ability of Methylobacterium extorquens to grow on methanol as the sole carbon and energy source has been the object of intense research activity. Unquestionably, the bacterial cell envelope serves as a defensive barrier against such an environmental stressor, with a decisive role played by the membrane lipidome, which is crucial for stress resistance. However, the chemistry and the function of the main constituent of the M. extorquens outer membrane, the lipopolysaccharide (LPS), is still undefined. Here, we show that M. extorquens produces a rough-type LPS with an uncommon, non-phosphorylated, and extensively O-methylated core oligosaccharide, densely substituted with negatively charged residues in the inner region, including novel monosaccharide derivatives such as O-methylated Kdo/Ko units. Lipid A is composed of a non-phosphorylated trisaccharide backbone with a distinctive, low acylation pattern; indeed, the sugar skeleton was decorated with three acyl moieties and a secondary very long chain fatty acid, in turn substituted by a 3-O-acetyl-butyrate residue. Spectroscopic, conformational, and biophysical analyses on M. extorquens LPS highlighted how structural and tridimensional features impact the molecular organization of the outer membrane. Furthermore, these chemical features also impacted and improved membrane resistance in the presence of methanol, thus regulating membrane ordering and dynamics.
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Affiliation(s)
- Flaviana Di Lorenzo
- Department
of Chemical Sciences and Task Force for Microbiome Studies, University of Naples Federico II, Via Cinthia 4, 80126 Naples, Italy
| | - Simone Nicolardi
- Center
for Proteomics and Metabolomics, Leiden
University Medical Center, Leiden 2333 ZA, The Netherlands
| | - Roberta Marchetti
- Department
of Chemical Sciences and Task Force for Microbiome Studies, University of Naples Federico II, Via Cinthia 4, 80126 Naples, Italy
| | - Adele Vanacore
- Department
of Chemical Sciences and Task Force for Microbiome Studies, University of Naples Federico II, Via Cinthia 4, 80126 Naples, Italy
| | - Noemi Gallucci
- Department
of Chemical Sciences and Task Force for Microbiome Studies, University of Naples Federico II, Via Cinthia 4, 80126 Naples, Italy
- CSGI, Consorzio
Interuniversitario per lo Sviluppo dei Sistemi a Grande Interfase, Via della Lastruccia 3, Sesto Fiorentino, Florence 50019, Italy
| | - Katarzyna Duda
- Research
Center Borstel Leibniz Lung Center, Parkallee 4a, 23845 Borstel, Germany
| | - Ferran Nieto Fabregat
- Department
of Chemical Sciences and Task Force for Microbiome Studies, University of Naples Federico II, Via Cinthia 4, 80126 Naples, Italy
| | - Ha Ngoc Anh Nguyen
- B-CUBE
Center for Molecular Bioengineering, Technische
Universität Dresden, Tatzberg 41, 01307 Dresden, Germany
| | - Djamel Gully
- IRD,
Laboratoire des Symbioses Tropicales et Méditerranéennes
(LSTM) UMR IRD/SupAgro/INRA/UM2/CIRAD, TA-A82/J, Campus de Baillarguet, 34398 Montpellier Cedex 5, France
| | - James Saenz
- B-CUBE
Center for Molecular Bioengineering, Technische
Universität Dresden, Tatzberg 41, 01307 Dresden, Germany
| | - Eric Giraud
- IRD,
Laboratoire des Symbioses Tropicales et Méditerranéennes
(LSTM) UMR IRD/SupAgro/INRA/UM2/CIRAD, TA-A82/J, Campus de Baillarguet, 34398 Montpellier Cedex 5, France
| | - Luigi Paduano
- Department
of Chemical Sciences and Task Force for Microbiome Studies, University of Naples Federico II, Via Cinthia 4, 80126 Naples, Italy
- CSGI, Consorzio
Interuniversitario per lo Sviluppo dei Sistemi a Grande Interfase, Via della Lastruccia 3, Sesto Fiorentino, Florence 50019, Italy
| | - Antonio Molinaro
- Department
of Chemical Sciences and Task Force for Microbiome Studies, University of Naples Federico II, Via Cinthia 4, 80126 Naples, Italy
| | - Gerardino D’Errico
- Department
of Chemical Sciences and Task Force for Microbiome Studies, University of Naples Federico II, Via Cinthia 4, 80126 Naples, Italy
- CSGI, Consorzio
Interuniversitario per lo Sviluppo dei Sistemi a Grande Interfase, Via della Lastruccia 3, Sesto Fiorentino, Florence 50019, Italy
| | - Alba Silipo
- Department
of Chemical Sciences and Task Force for Microbiome Studies, University of Naples Federico II, Via Cinthia 4, 80126 Naples, Italy
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