A Rhizobium leguminosarum AcpXL Mutant Produces Lipopolysaccharide Lacking 27-Hydroxyoctacosanoic Acid

A Rhizobium leguminosarum AcpXL Mutant Produces Lipopolysaccharide Lacking 27-Hydroxyoctacosanoic Acid
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豆根瘤菌 AcpXL 突变体产生缺乏 27-羟基二十八烷酸的脂多糖

DOI:
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发表时间:
2003
影响因子:
3.2
通讯作者:
R. Carlson
R. Carlson
中科院分区:
生物学3区
文献类型:
--
作者:
Vinata Vedam;E. Kannenberg;E. Kannenberg;J. G. Haynes;D. Sherrier;A. Datta;R. Carlson

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大豆根瘤菌和豆科根瘤菌脂多糖(Rhizobiumleguminosarum lipopolysaccharides,LPSs)的脂质A结构中4′端含有一个半乳糖醛酸残基,一个酰化的2-氨基葡萄糖酸取代了近端的葡萄糖胺,并含有一个很长的ω-1羟基脂肪酸27-羟基二十八烷酸(27 OHC 28:0)。27 OHC 28:0部分在根瘤菌科成员中的脂质A中是常见的,并且在形成慢性感染的许多兼性细胞内病原体中也是常见的,例如,流产布鲁氏菌、汉赛巴尔通体和嗜肺军团菌。本文报道了一个R.通过将卡那霉素抗性盒置于acpXL(编码27 OHC 28:0的酰基载体蛋白的基因)内来产生豆类根瘤菌。结果是含有缺乏27 OHC 28:0的四酰化脂质A的LPS。少量的突变脂质A可含有添加的棕榈酸残基。该突变体对渗透压的变化和酸度的增加敏感,这些生长条件可能发生在结核微环境中。尽管根瘤的微环境可能是不利的,但acpXL突变体仍然能够形成固氮根瘤,即使根瘤的出现和发育被延迟。因此,acpXL突变体可能具有宿主诱导机制,使其能够适应这些生理变化。
ABSTRACT The structure of the lipid A from Rhizobium etli and Rhizobium leguminosarum lipopolysaccharides (LPSs) lacks phosphate and contains a galacturonosyl residue at its 4′ position, an acylated 2-aminogluconate in place of the proximal glucosamine, and a very long chain ω-1 hydroxy fatty acid, 27-hydroxyoctacosanoic acid (27OHC28:0). The 27OHC28:0 moiety is common in lipid A's among members of the Rhizobiaceae and also among a number of the facultative intracellular pathogens that form chronic infections, e.g., Brucella abortus, Bartonella henselae, and Legionella pneumophila. In this paper, a mutant of R. leguminosarum was created by placing a kanamycin resistance cassette within acpXL, the gene which encodes the acyl carrier protein for 27OHC28:0. The result was an LPS containing a tetraacylated lipid A lacking 27OHC28:0. A small amount of the mutant lipid A may contain an added palmitic acid residue. The mutant is sensitive to changes in osmolarity and an increase in acidity, growth conditions that likely occur in the nodule microenvironment. In spite of the probably hostile microenvironment of the nodule, the acpXL mutant is still able to form nitrogen-fixing root nodules even though the appearance and development of nodules are delayed. Therefore, it is possible that the acpXL mutant has a host-inducible mechanism which enables it to adapt to these physiological changes.
来自共生缺陷根瘤菌脂多糖突变体的脂多糖的类型和产量根据提取方法而变化。
DOI: 10.1093/glycob/10.10.1013
发表时间: 2000
期刊: Glycobiology
影响因子: 4.3
作者:
Ridley,BL;Jeyaretnam,BS;Carlson,RW
通讯作者: Carlson,RW
属于变形菌门 α-2 亚组的细菌脂多糖中 27-羟基-二十八烷酸的分布和系统发育意义。
DOI: 10.1099/00207713-41-2-213
发表时间: 1991
期刊: International journal of systematic bacteriology
影响因子: --
作者:
Bhat,UR;Carlson,RW;Busch,M;Mayer,H
通讯作者: Mayer,H
DOI: 10.1074/jbc.m004009200
发表时间: 2000
期刊: The Journal of biological chemistry
影响因子: --
作者:
Que,NL;Ribeiro,AA;Raetz,CR
通讯作者: Raetz,CR
DOI: --
发表时间: 1994-04
期刊: BioTechniques
影响因子: 2.7
作者:
Michael E. Kovach;R. Phillips;P. Elzer;R. Roop;K. Peterson
通讯作者: Michael E. Kovach;R. Phillips;P. Elzer;R. Roop;K. Peterson
DOI: --
发表时间: 1994-05
期刊: The Journal of biological chemistry
影响因子: --
作者:
U. R. Bhat;L. S. Forsberg;R. W. Carlson
通讯作者: U. R. Bhat;L. S. Forsberg;R. W. Carlson