A bacterial ATP-dependent, enhancer binding protein that activates the housekeeping RNA polymerase

Article Abstract:

Promoters in bacteria are usually thought to be transcriptionally activated by one of two general methods in gene regulation. A third mechanism has been identified in the photosynthetic bacterium Rhodobacter capsulatus, one that has properties of both of the known methods. An ATP-dependent, enhancer-binding protein activates the RNA polymerase responsible for housekeeping. There are some related mechanistic and evolutionary issues.

Genetic aspects, Bacterial genetics, Genetic regulation, Genetic transcription, Transcription (Genetics), RNA polymerases, Adenosine triphosphate, ATP, Bacteria, Photosynthetic, Photosynthetic bacteria

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Regulation of homologous recombination: Chi inactivates RecBCD enzyme by disassembly of the three subunits

Article Abstract:

Research shows that Chi regulates individual RecBCD enzyme molecules to form single recombinational exchanges. All three subunits of RecBCD enzymes are disassembled after interacting with a Chi recombination hot spot, and migrate separately during glycerol gradient and native gel processes. This finding supports the one enzyme/one exchange theory of recombination.

United States, Enzymes, Genetic recombination, Homology (Biology), Enzyme regulation, Enzyme activation

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