Replication initiator DnaA interacts with an anti-terminator NusG in T. tengcongensis.
DnaA plays a central role in initiation of DNA replication at oriC in bacteria, and is also a transcription regulator which interacts with the DnaA box relative to a specific gene. Through screening the interaction between TtDnaA and the transcription machinery in Thermoanaerobacter tengcongensis by yeast two-hybrid assays, we found for the first time that the TtDnaA could interact with an anti-terminator, TtNusG2, in this thermophilic bacterium. The direct interaction between TtDnaA and TtNusG2 was verified by surface plasmon resonance (SPR) assay in vitro, and was further confirmed by co-immunoprecipitation assay in vivo. Moreover, we demonstrated that domain I and domain III of TtDnaA were responsible for the interaction with TtNusG2. These findings might expand our understanding of cooperation of two fundamental processes, replication and transcription, in this bacterium.
Liu
Jingfang
J
State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Datun Road, Chaoyang District, Beijing 100101, PR China.
Pei
Huadong
H
Mei
Shuangshuang
S
Li
Jie
J
Zhou
Ligang
L
Xiang
Hua
H
D001426:Bacterial Proteins / Q000378:metabolism*; D004261:DNA Replication; D004268:DNA-Binding Proteins / Q000378:metabolism*; D047468:Immunoprecipitation; D010445:Peptide Elongation Factors / Q000378:metabolism*; D020349:Surface Plasmon Resonance; D046968:Thermoanaerobacter / Q000235:genetics* / Q000378:metabolism; D014158:Transcription, Genetic; D020798:Two-Hybrid System Techniques
D001426:Bacterial Proteins; D004268:DNA-Binding Proteins; C066312:DnaA protein, Bacteria; D010445:Peptide Elongation Factors