Are campylobacters now capable of carbo-loading?

Area of Science:

• Microbiology
• Biochemistry
• Glycobiology

Background:

• Campylobacters, including Campylobacter jejuni and Campylobacter coli, are significant causes of global gastrointestinal illness.
• These bacteria are known for mimicking human glycoconjugates and synthesizing N- and O-linked glycoproteins.
• Previous understanding suggested Campylobacters were largely unable to metabolize sugars, though fucose metabolism was recently identified in some strains.

Purpose of the Study:

• To investigate the metabolic capabilities of Campylobacter jejuni and Campylobacter coli regarding glucose utilization.
• To elucidate the specific pathways involved in glucose catabolism in these bacterial species.
• To explore the potential incorporation of metabolized glucose into cellular components.

Main Methods:

• Utilized isotopologue profiling to trace the metabolic fate of glucose in Campylobacter strains.
• Analyzed glucose catabolism through the Entner-Doudoroff and pentose phosphate pathways.

Main Results:

• Demonstrated that specific strains of Campylobacter coli and Campylobacter jejuni can catabolize glucose.
• Identified the Entner-Doudoroff and pentose phosphate pathways as key routes for glucose metabolism.
• Showed that glucose can be incorporated into amino acids and glycoconjugates, in addition to being used for nutrition.

Conclusions:

• Campylobacters possess a more diverse metabolic capacity than previously thought, including glucose utilization.
• The ability to metabolize and incorporate glucose offers new avenues for studying Campylobacter glycoconjugate biosynthesis.
• This research expands the understanding of nutritional diversity within Campylobacter species.