Xylan-breakdown apparatus of Clostridium thermocellum

Hamann, Pedro Ricardo Vieira; Noronha, Eliane Ferreira

doi:10.1007/s10570-022-04741-0

Cited by 3 publications

(1 citation statement)

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“…Cellulose-degrading enzymes are essential for use in different industries such as textile, biofuels, paper, detergents, food, and animal feed ( 3 – 5 ). These enzymes are necessary need for the industry due to their modular architecture, substrate-specificity and other biochemical properties ( 8 ). Recently, cellulase-producing bacteria isolated from the animal’s gut have been formulated as probiotics to replace antibiotics, for example Lactobacillus, Bifidobacteria and Escherichia genera ( 9 , 10 ).…”

Section: Introductionmentioning

confidence: 99%

Screening and evaluation of the ruminal cellulolytic bacteria and their potential application as probiotics

Ghiasi,

Gheibipour,

Motamedi

et al. 2024

IJM

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Background and Objectives: Rumen microbiologists are looking for new probiotics to improve the digestibility of livestock diets. This study intended to screen and evaluate the ruminal cellulolytic bacteria (CBs) and their potential application as probiotics. Materials and Methods: Microbial culture and molecular techniques performed to isolate CBs from the rumen of camels, deer and rams. Their antibacterial and antibiogram tests were done using disc diffusion method. Their potential to degrade cellulose, starch, tannin and protein were investigated using clear zone halo, and spectrophotometric techniques. Bilious, saline, and acidic broth media were used to study the resistance of isolates in intestinal conditions. Results: The phylogenetic analysis revealed that the strains belonged to Firmicutes and Proteobacteria phyla, Citrobacter murliniae, Ornithinibacillus bavariensis, C. braakii, and Bacillus subtilis. The highest cellulase (CAS) activity was recorded by C. murliniae Dez wildlife13A (2.98 UmL-1), whereas C. braakii Loot desert 111A (1.14 Uml-1) was produced the lowest enzyme. The isolates were highly resistant to synthetic conditions of intestine (pH 2.5-3.5, bile 0.3-2%), as well as tolerated higher concentrations of NaCl (up to 10%). They effectively inhibited standard pathogen strains, and showed sensitivity to the used antibiotics. Conclusion: This study reports the cellulolytic O. bavariensis Tabbas desert 32A for the first time from the rumen, which will have potential biotechnological applications.

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