Bifidobacterium breve UCC2003 metabolises the human milk oligosaccharides lacto-N-tetraose and lacto-N-neo-tetraose through overlapping, yet distinct pathways.

Bifidobacterium breve UCC2003 metabolises the human milk oligosaccharides lacto-N-tetraose and lacto-N-neo-tetraose through overlapping, yet distinct pathways.
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DOI:
10.1038/srep38560
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发表时间:
2016-12-08
期刊:
影响因子:
4.6
通讯作者:
van Sinderen D
van Sinderen D
中科院分区:
综合性期刊3区
文献类型:
--
作者:
James K;Motherway MO;Bottacini F;van Sinderen D

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在这项研究中,我们证明了原型B。短杆菌UCC 2003具有利用乳-N-四糖(LNT)和乳-N-新四糖(LNnT)的特定代谢途径,所述乳-N-四糖和乳-N-新四糖分别代表I型和II型人乳寡糖(HMO)的中心部分。使用实验方法的组合,参与LNT和LNnT代谢的酶机制进行了鉴定和表征。在B中鉴定了参与这些HMO底物利用的关键遗传基因座的同源物。breve,B. bifidum,B.长双歧杆菌婴儿亚种A和B。长双歧杆菌婴儿亚种longum,并显示出在双歧杆菌属的其他成员中不存在,在人类相关的双歧杆菌属细菌物种中具有独特的保守模式。
In this study, we demonstrate that the prototype B. breve strain UCC2003 possesses specific metabolic pathways for the utilisation of lacto-N-tetraose (LNT) and lacto-N-neotetraose (LNnT), which represent the central moieties of Type I and Type II human milk oligosaccharides (HMOs), respectively. Using a combination of experimental approaches, the enzymatic machinery involved in the metabolism of LNT and LNnT was identified and characterised. Homologs of the key genetic loci involved in the utilisation of these HMO substrates were identified in B. breve, B. bifidum, B. longum subsp. infantis and B. longum subsp. longum using bioinformatic analyses, and were shown to be variably present among other members of the Bifidobacterium genus, with a distinct pattern of conservation among human-associated bifidobacterial species.
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