Bifidobacterium infantis utilizes N-acetylglucosamine-containing human milk oligosaccharides as a nitrogen source.

Bifidobacterium infantis utilizes N-acetylglucosamine-containing human milk oligosaccharides as a nitrogen source.
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DOI:
10.1080/19490976.2023.2244721
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发表时间:
2023-12
期刊:
影响因子:
12.2
通讯作者:
--
中科院分区:
医学2区
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--
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长双歧杆菌亚种婴儿芽孢杆菌(B.fantis)利用人乳中分泌的寡糖作为碳水化合物来源。这些母乳低聚糖 (HMO) 整合了含氮残基 N-乙酰氨基葡萄糖 (NAG),但迄今为止尚未描述 HMO 氮的利用。在此,我们描述了两种含有 NAG 的 HMO 物种 LNT 和 LNnT 的婴儿双歧杆菌氮利用表型。这是通过体外生长动力学、将同位素标记的 NAG 氮掺入蛋白质组以及利用 HMO 氮调节细胞内 2-酮戊二酸水平来表征的。比较转录组学和蛋白质组学提供了进一步的支持,确定了 HMO 氮利用过程中部署的全球监管网络。汇总数据表明,婴儿双歧杆菌菌株利用 HMO 氮有可能显着影响基础和临床研究,并实现应用。
Bifidobacterium longum subsp. infantis (B. infantis) utilizes oligosaccharides secreted in human milk as a carbohydrate source. These human milk oligosaccharides (HMOs) integrate the nitrogenous residue N-acetylglucosamine (NAG), although HMO nitrogen utilization has not been described to date. Herein, we characterize the B. infantis nitrogen utilization phenotype on two NAG-containing HMO species, LNT and LNnT. This was characterized through in vitro growth kinetics, incorporation of isotopically labeled NAG nitrogen into the proteome, as well as modulation of intracellular 2-oxoglutarate levels while utilizing HMO nitrogen. Further support is provided by comparative transcriptomics and proteomics that identified global regulatory networks deployed during HMO nitrogen utilization. The aggregate data demonstrate that B. infantis strains utilize HMO nitrogen with the potential to significantly impact fundamental and clinical studies, as well as enable applications.
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