Caulobacter requires anionic sphingolipids and deactivation of fur to lose lipid A
Caulobacter requires anionic sphingolipids and deactivation of fur to lose lipid A
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柄杆菌需要阴离子鞘脂和毛皮失活才能失去脂质 A
DOI:
10.1101/2022.01.20.477143
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Ryan, K.
中科院分区:
文献类型:
--
作者:
Zik, J;Yoon, S;Guan, Z;Skidmore, G;Gudoor, R;Davies, K;Deutschbauer, A;Goodlett, D;Klein, E;Ryan, K.
Lipid A, the membrane-anchored portion of lipopolysaccharide, is an essential component of the outer membrane (OM) of nearly all Gram-negative bacteria. Here, we identify regulatory and structural factors that together permitCaulobacter crescentusto eliminate lipid A from its OM. Mutations in the ferric uptake regulatorfurallowCaulobacterto survive in the absence of either LpxC, which catalyzes an early step of lipid A synthesis, or CtpA, a tyrosine phosphatase homolog which we find is needed for wild-type lipid A structure and abundance. Alterations in Fur-regulated processes, rather than iron statusper se, underlie the ability to eliminate lipid A. Fitness of lipid A-deficientCaulobacterrequires a previously uncharacterized anionic sphingolipid, ceramide phosphoglycerate (CPG), which also mediates sensitivity to the antibiotic colistin. Our results demonstrate that, in an altered regulatory landscape, anionic sphingolipids can support the integrity of a lipid A-deficient OM.
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影响因子:
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通讯作者:
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影响因子:
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作者:
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