Some (bacilli) like it hot: genomics of Geobacillus species.

Some (bacilli) like it hot: genomics of Geobacillus species.
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DOI:
10.1111/1751-7915.12161
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发表时间:
2015-01
影响因子:
5.7
通讯作者:
Studholme DJ
Studholme DJ
中科院分区:
工程技术2区
文献类型:
--
作者:
Studholme DJ

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土芽孢杆菌属包括嗜热革兰氏阳性孢子形成细菌,其在芽孢杆菌科内形成一个遗传上连贯的进化枝。它们对生物技术具有重大意义(如下文所述)。这些嗜热菌似乎无处不在;活的土芽孢杆菌孢子不仅可以从热环境如热液喷口中大量分离,而且矛盾的是,还可以从凉爽的土壤和寒冷的海洋沉积物中分离(Zeigler,2014)。这些细菌先前被归类为芽孢杆菌属内的“第5组”,但随后被分成新的土芽孢杆菌属(Nazina等人,2001年)的报告。许多土芽孢杆菌属菌株以前被描述为属于一个单一的物种嗜热脂肪芽孢杆菌,但很明显,有很大的异质性,在这些菌株的生理,偏好的温度范围和其他表型特征。例如,参见图1,其显示了描述为“B”的三种菌株中的三种不同的菌落形态。嗜热脂肪菌。现在绝对清楚的是,在土芽孢杆菌中存在几个不同的物种,并且这些物种可以通过基因型和表型两者来区分(Nazina等人,2001; Banat等人,2004; Zeigler,2005; Dinsdale等人,2011; Coorevits等人,2012年)。
The genus Geobacillus includes thermophilic Grampositive spore-forming bacteria that form a phylogenetically coherent clade within the family Bacillaceae. They are of great interest for biotechnology (as discussed below). These thermophiles seem to be ubiquitous; viable Geobacillus spores can be isolated in large quantities not only from hot environments such as hydrothermal vents, but also, paradoxically, from cool soils and cold ocean sediments (Zeigler, 2014).These bacteria were previously categorized as ‘Group 5’within the genus Bacillus but were subsequently split into the new genus Geobacillus (Nazina et al., 2001). Many Geobacillus strains were previously described as belonging to a single species Bacillus stearothermophilus, but it was clear that there was great heterogeneity in physiology, preferred temperature range and other phenotypic characteristics among these strains. For example, see Fig. 1 showing three distinct colony morphologies among three strains described as ‘B. stearothermophilus’. It is now absolutely clear that there are several distinct species within Geobacillus and these can be distinguished by both genotype and phenotype (Nazina et al., 2001; Banat et al., 2004; Zeigler, 2005; Dinsdale et al., 2011; Coorevits et al., 2012).
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发表时间: 2013-08-15
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影响因子: --
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发表时间: 2004-02-01
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