Paenibacillus sp. strain JDR-2 and XynA1: A novel system for methylglucuronoxylan utilization

Article Abstract:

A Paenibacillus sp. is isolated and characterized for its ability to efficiently utilize MeGAXn and a modular xylanase (XynA1) was identified through DNA sequence analysis and with MeGAXn as substrate, XynA1 CD generated xylobiose and aldotetrauronate MeGAX3 as predominant products. The inability to detect depolymerization products in medium during exponential growth as well as the decreased growth rates and yield with XynA1 indicates that XynA1 catalyzes a depolymerization process coupled to product assimilation.

Nucleotide sequence, Base sequence, Bacillus (Bacteria), Bacillus

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Identification of a putative operon involved in fructooligosaccharide utilization by Lactobacillus paracasei

Article Abstract:

A shotgun microarray based approach is described for identifying the genes encoding the fructooligosaccharides (FOS) utilization pathway in Lactobacillus paracasei 1195. The results have disclosed the presence of an operon that has encoded a cell surface-anchored fructosidase and a fructose phosphotransferase system (PTS) that are involved in the hydrolysis of FOS and the subsequent transport of free fructose into the cytoplasm, respectively.

Nebraska, Physiological aspects, Lactobacillus, Oligosaccharides, Operons

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Lactobacillus paracasei subsp. paracasei 8700:2 degrades insulin-type fructans exhibiting differen degrees of polymerization

Article Abstract:

The ability of lactobacilli is investigated to ferment inulin-type fructans and to study their kinetics of growth and fructan degradation. Results reveal that the ability to ferment inulin-type fructans is not a unique feature of bifidobacteria, nor is it common among lactobacilli.

Bifidobacterium, Genetic research, Lactobacillus plantarum, Bifidobacteria

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