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Characterization on structure and bioactivities of an exopolysaccharide from Lactobacillus curvatus SJTUF 62116

Zhu, Jinyu ; Tan, Zhongfang ; Zhang, Zhong ; Shi, Xianming

International journal of biological macromolecules, 2022-06, Vol.210, p.504-517 [Periódico revisado por pares]

Netherlands: Elsevier B.V

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  • Título:
    Characterization on structure and bioactivities of an exopolysaccharide from Lactobacillus curvatus SJTUF 62116
  • Autor: Zhu, Jinyu ; Tan, Zhongfang ; Zhang, Zhong ; Shi, Xianming
  • Assuntos: Anti-biofilm formation activity ; Antibacterial activity ; Antioxidation activity ; Exopolysaccharide ; Lactobacillus curvatus
  • É parte de: International journal of biological macromolecules, 2022-06, Vol.210, p.504-517
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
  • Descrição: This study aimed to investigate the chemical structure, physicochemical properties, antioxidant capacity, antibacterial ability and anti-biofilm formation activity of an exopolysaccharide (EPS) produced by Lactobacillus curvatus SJTUF 62116 from the fish Gymnocypris przewalskii. The purified EPS, denoted as EPS-1, was mainly composed of glucose and mannose at a relative molar ratio of 1:1.05 with molecular weight of 31.9 kDa. The chemical structure of EPS-1 was consisted of →2)-α-D-Manp-(1→, →4)-α-D-Manp-(1→, →3,6)-α-D-Manp-(1→, T-β-D-Glcp-(1→, →6)-β-D-Glcp-(1→, and →3)-β-D-Glcp-(1→ glycosidic bonds. A sheet-like structure of dried EPS-1 was determined by scanning electron microscope (SEM), whilst a peak-shaped structure of EPS-1 was observed by atomic force microscope (AFM). The degradation temperature of EPS-1 was determined as 300.21 °C using thermogravimetric analysis (TGA). Moreover, the antioxidant capacity of EPS-1 at a concentration of 5.0 mg/mL against DPPH and ABTS was 84.50% and 92.53%, respectively. Furthermore, EPS-1 exhibited acceptable bacteriostatic efficacy against S. Enteritidis, E. coli, and S.aureus with significant inhibition of S. Enteritidis biofilm formation. •An exopolysaccharide (EPS-1) was obtained from Lactobacillus curvatus SJTUF 62116.•EPS-1 was a heteropolysaccharide with high degree of branching value.•EPS-1 showed antibacterial activity against 3 pathogens with significant inhibition of S. Enteritidis biofilm formation.
  • Editor: Netherlands: Elsevier B.V
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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