Characterization of inositol lipid metabolism in gut-associated Bacteroidetes.
Characterization of inositol lipid metabolism in gut-associated Bacteroidetes.
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肠相关拟杆菌中肌醇脂质代谢的特征。
DOI:
10.1038/s41564-022-01152-6
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发表时间:
2022-07
影响因子:
28.3
通讯作者:
中科院分区:
文献类型:
--
作者:
Inositol lipids are ubiquitous in eukaryotes and have finely tuned roles in cellular signalling and membrane homoeostasis. In Bacteria, however, inositol lipid production is relatively rare. Recently, the prominent human gut bacterium Bacteroides thetaiotaomicron (BT) was reported to produce inositol lipids and sphingolipids, but the pathways remain ambiguous and their prevalence unclear. Here, using genomic and biochemical approaches, we investigated the gene cluster for inositol lipid synthesis in BT using a previously undescribed strain with inducible control of sphingolipid synthesis. We characterized the biosynthetic pathway from myo-inositol-phosphate (MIP) synthesis to phosphoinositol dihydroceramide, determined the crystal structure of the recombinant BT MIP synthase enzyme and identified the phosphatase responsible for the conversion of bacterially-derived phosphatidylinositol phosphate (PIP-DAG) to phosphatidylinositol (PI-DAG). In vitro, loss of inositol lipid production altered BT capsule expression and antimicrobial peptide resistance. In vivo, loss of inositol lipids decreased bacterial fitness in a gnotobiotic mouse model. We identified a second putative, previously undescribed pathway for bacterial PI-DAG synthesis without a PIP-DAG intermediate, common in Prevotella. Our results indicate that inositol sphingolipid production is widespread in host-associated Bacteroidetes and has implications for symbiosis. The pathways responsible for inositol lipid production in human gut Bacteroides are characterized and these lipids are important for capsule expression and antimicrobial peptide resistance in vitro and colonization in vivo.
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DOI:
10.1107/s090744491003982x
发表时间:
2011-04
期刊:
Acta crystallographica. Section D, Biological crystallography
影响因子:
--
作者:
Evans PR
通讯作者:
Evans PR
DOI:
10.1093/bioinformatics/btu638
发表时间:
2015-01-15
期刊:
Bioinformatics (Oxford, England)
影响因子:
--
作者:
Anders S;Pyl PT;Huber W
通讯作者:
Huber W
DOI:
10.1038/nrm.2017.107
发表时间:
2018-03
期刊:
Nature reviews. Molecular cell biology
影响因子:
--
作者:
Hannun YA;Obeid LM
通讯作者:
Obeid LM
影响因子:
2.9
作者:
Bui, Hai H.;Sanders, Phillip E.;Fischl, Anthony S.
通讯作者:
Fischl, Anthony S.
影响因子:
3.6
作者:
Cerantola, Vanessa;Guillas, Isabelle;Conzelmann, Andreas
通讯作者:
Conzelmann, Andreas