High rate of mobilization for blaCTX-Ms.
High rate of mobilization for blaCTX-Ms.
复制标题
BLACTX-MS的高动员率。
DOI:
10.3201/eid1403.070405
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发表时间:
2008-03
影响因子:
11.8
通讯作者:
Tenover, Fred C.
中科院分区:
文献类型:
--
作者:
Barlow, Miriam;Reik, Rebecca A.;Jacobs, Stephen D.;Medina, Monica;Meyer, Matthew P.;McGowan, John E., Jr.;Tenover, Fred C.
The blaCTX-Ms have been mobilized to plasmids more frequently than other class A β-lactamases. We constructed a phylogenetic analysis of class A β-lactamases and found that the blaCTX-Ms have been mobilized to plasmids ≈10 times more frequently than other class A β-lactamases. We also found that the blaCTX-Ms are descended from a common ancestor that was incorporated in ancient times into the chromosome of the ancestor of Kluyvera species through horizontal transfer. Considerable sequence divergence has occurred among the descendents of that ancestral gene sequence since that gene was inserted. That divergence has mainly occurred in the presence of purifying selection, which indicates a slow rate of evolution for blaCTX-Ms in the pre–antimicrobial drug era.
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影响因子:
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通讯作者:
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