Genetic and chemical differentiation of Campylobacter coli and Campylobacter jejuni lipooligosaccharide pathways

Genetic and chemical differentiation of Campylobacter coli and Campylobacter jejuni lipooligosaccharide pathways
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大肠杆菌弯曲杆菌和空肠弯曲杆菌脂寡糖途径的遗传和化学分化

DOI:
10.1101/050328
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发表时间:
2016
期刊:
--
影响因子:
--
通讯作者:
Culebro A
Culebro A
中科院分区:
--
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--
作者:
Culebro A

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尽管脂寡糖(LOS)在弯曲杆菌病的致病性中具有重要作用,但对LOS在C中的遗传和表型多样性知之甚少。杆菌在这项研究中,我们调查了LOS位点类的分布在一个大的收集无关C。从几种不同的宿主物种中取样的大肠杆菌分离株。此外,我们对C。大肠杆菌基因组信息和LOS化学组成的首次鉴定机制与LOS表型异质性的产生一致。在将三个新的LOS位点分类后,测试的144个分离株中只有85%被分配到一类,这表明遗传多样性比以前认为的要高。这种遗传多样性是在一个完全未开发的LOS结构异质性的基础上。质谱分析代表四种不同LOS类别的九个分离株的LOS,确定了两个特征:C。coliLOS从C.空肠。GlcN-GlcN二糖存在于脂质A骨架中,与C中观察到的GlcN 3 N-GlcN骨架相反。空肠。此外,尽管Qui 3 pNAcyl中涉及的许多基因puplex在各种分离物的基因组中不存在,但在allC的外核中发现了这种罕见的糖。杆菌因此,尽管LOS生物合成的高遗传多样性是在C。coli中,我们鉴定了C. coliLOS可能解释了C. jejuniandC.大肠杆菌在种群动态和宿主适应方面的作用。coliare在RAST服务器(http://www.example.com)上公开可用,具有访客帐户(登录名和密码'guest'),ID为:195.91、195.96-195.119、195.124-195.126、195.128-195.130、195.133、195.134、6666666.94320 rast.nmpdr.org
Despite the importance of lipooligosaccharides (LOS) in the pathogenicity of campylobacteriosis, little is known about the genetic and phenotypic diversity of LOS inC. coli. In this study, we investigated the distribution of LOS locus classes among a large collection of unrelatedC. coliisolates sampled from several different host species. Furthermore, we pairedC. coligenomic information and LOS chemical composition for the first time to identify mechanisms consistent with the generation of LOS phenotypic heterogeneity. After classifying three new LOS locus classes, only 85% of the 144 isolates tested were assigned to a class, suggesting higher genetic diversity than previously thought. This genetic diversity is at the basis of a completely unexplored LOS structure heterogeneity. Mass spectrometry analysis of the LOS of nine isolates, representing four different LOS classes, identified two features distinguishingC. coliLOS fromC. jejuni’s. GlcN-GlcN disaccharides were present in the lipid A backbone in contrast to the GlcN3N-GlcN backbone observed inC. jejuni. Moreover, despite that many of the genes putatively involved in Qui3pNAcyl were absence in the genomes of various isolates, this rare sugar was found in the outer core of allC. coli. Therefore, regardless the high genetic diversity of LOS biosynthes is locus inC. coli, we identified species-specific phenotypic features ofC. coliLOS which might explain differences betweenC. jejuniandC. coliin terms of population dynamics and host adaptation.Depositories (where applicable)The whole genome sequences ofC. coliare publicly available on the RAST server (http://rast.nmpdr.org) with guest account (login and password ‘guest’) under IDs: 195.91, 195.96-195.119, 195.124-195.126, 195.128-195.130, 195.133, 195.134, 6666666.94320
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