Laboratory strains of Escherichia coli K-12: things are seldom what they seem.

Laboratory strains of Escherichia coli K-12: things are seldom what they seem.
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DOI:
10.1099/mgen.0.000922
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发表时间:
2023-03
期刊:
影响因子:
3.9
通讯作者:
Busby, Stephen J. W.
Busby, Stephen J. W.
中科院分区:
生物学2区
文献类型:
--
作者:
Browning, Douglas F.;Hobman, Jon L.;Busby, Stephen J. W.

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大肠杆菌 K-12最初是在100年前分离出来的,从那时起,它就成为了一种非常宝贵的模式生物,也是分子生物学研究的基石。然而,尽管它的血统,因为它最初的隔离, E.杆菌 K-12经过反复培养、传代和诱变,产生了携带许多遗传变化的生物体。为了更多地了解这种重要的模式生物,我们对两种祖先K-12菌株WG 1和EMG 2的基因组进行了测序,这两种菌株被认为是许多重点实验室菌株的祖先。我们的分析证实,这些菌株仍然携带遗传元件,如噬菌体λ(λ)和F质粒,但也表明它们经历了广泛的基于实验室的进化。因此,仔细检查祖先的基因组 E.杆菌 K-12菌株引导我们检查是否 E.杆菌 K-12是21世纪世纪微生物学的一种足够稳健的模式生物。
Escherichia coli K-12 was originally isolated 100 years ago and since then it has become an invaluable model organism and a cornerstone of molecular biology research. However, despite its pedigree, since its initial isolation E. coli K-12 has been repeatedly cultured, passaged and mutagenized, resulting in an organism that carries many genetic changes. To understand more about this important model organism, we have sequenced the genomes of two ancestral K-12 strains, WG1 and EMG2, considered to be the progenitors of many key laboratory strains. Our analysis confirms that these strains still carry genetic elements such as bacteriophage lambda (λ) and the F plasmid, but also indicates that they have undergone extensive laboratory-based evolution. Thus, scrutinizing the genomes of ancestral E. coli K-12 strains leads us to examine whether E. coli K-12 is a sufficiently robust model organism for 21st century microbiology.
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