The methionine salvage pathway in Bacillus subtilis.
The methionine salvage pathway in Bacillus subtilis.
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枯草芽孢杆菌中的蛋氨酸拯救途径。
DOI:
10.1186/1471-2180-2-8
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发表时间:
2002-04-25
期刊:
影响因子:
4.2
通讯作者:
Danchin, Antoine
中科院分区:
文献类型:
--
作者:
Sekowska, Agnieszka;Danchin, Antoine
Polyamine synthesis produces methylthioadenosine, which has to be disposed of. The cell recycles it into methionine through methylthioribose (MTR). Very little was known about MTR recycling for methionine salvage in Bacillus subtilis. Using in silico genome analysis and transposon mutagenesis in B. subtilis we have experimentally uncovered the major steps of the dioxygen-dependent methionine salvage pathway, which, although similar to that found in Klebsiella pneumoniae, recruited for its implementation some entirely different proteins. The promoters of the genes have been identified by primer extension, and gene expression was analyzed by Northern blotting and lacZ reporter gene expression. Among the most remarkable discoveries in this pathway is the role of an analog of ribulose diphosphate carboxylase (Rubisco, the plant enzyme used in the Calvin cycle which recovers carbon dioxide from the atmosphere) as a major step in MTR recycling. A complete methionine salvage pathway exists in B. subtilis. This pathway is chemically similar to that in K. pneumoniae, but recruited different proteins to this purpose. In particular, a paralogue or Rubisco, MtnW, is used at one of the steps in the pathway. A major observation is that in the absence of MtnW, MTR becomes extremely toxic to the cell, opening an unexpected target for new antimicrobial drugs. In addition to methionine salvage, this pathway protects B. subtilis against dioxygen produced by its natural biotope, the surface of leaves (phylloplane).
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DOI:
10.1007/bf00383309
发表时间:
1985-01-01
期刊:
MOLECULAR AND GENERAL GENETICS
影响因子:
--
作者:
MURPHY, E
通讯作者:
MURPHY, E
影响因子:
3.2
作者:
SAUNDERS, CW;SCHMIDT, BJ;GUYER, MS
通讯作者:
GUYER, MS
DOI:
10.1073/pnas.44.10.1072
发表时间:
1958-01-01
影响因子:
11.1
作者:
SPIZIZEN, J
通讯作者:
SPIZIZEN, J
影响因子:
3.6
作者:
Dartois, V;Djavakhishvili, T;Hoch, JA
通讯作者:
Hoch, JA
影响因子:
3.2
作者:
KUNST, F;RAPOPORT, G
通讯作者:
RAPOPORT, G