STRUCTURAL STUDIES OF THE BACTERIAL TRANSCRIPTION FACTOR

细菌转录因子的结构研究

基本信息

项目摘要

Two component signaling systems are very common in bacteria, but also occur in eukaryotes. The signaling occurs through transfer of a phosphate from a kinase to a "receiver" protein, initiating a conformational change, leading to altered interactions with other proteins to propagate the signal. The investigators will study the bacterial transcription factor NtrC, which upon phosphorylation undergoes self-association, interaction with sigma54 polymerase and ATP hydrolysis, leading to transcription. Understanding this relatively simple system will provide a basis for understanding more complex eukaryotic signaling processes, and could also lead to approaches for interrupting specific bacterial signaling processes. The goal of the work proposed here is to determine the structures of the bacterial transcription factor NtrC, and domains of it, to gain an understanding of the molecular basis for its activity, and thereby the general processes for molecular signal transduction. Specific aims are to: (1) determine a high resolution structure of the BeF3- activated receiver domain, and to understand differences and similarities in changes upon activation with respect to other receiver domains; (2) to express and purify the wild type sequence DNA binding domain, and determine the structure of this dimer bound to an enhancer DNA sequence, as well as trying to understand the role of the linker connecting to the adjacent domain; (3) to make and screen constructs of the central ATPase domain for structure determination (including those from a thermophile), and determine the structures of this domain in different nucleotide ligation states; (4) to examine the role of the communication helix linking the receiver and central domains, and to analyze broadly the interactions between the receiver and central domains; (5) to examine intact NtrC with gel shift, fluorescence and EPR approaches to track changes upon activation, assembly and nucleotide hydrolysis, and to express the sigma54 subunit of polymerase to start to explore its interactions with NtrC.
双组分信号系统在细菌中很常见,但是

项目成果

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DAVID E WEMMER其他文献

DAVID E WEMMER的其他文献

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{{ truncateString('DAVID E WEMMER', 18)}}的其他基金

Proposal for Central California 900 MHZ NMR Spectrometer
加州中部 900 MHZ 核磁共振波谱仪提案
  • 批准号:
    6684038
  • 财政年份:
    2003
  • 资助金额:
    $ 7.94万
  • 项目类别:
Proposal for Central California 900 MHZ NMR Spectrometer
加州中部 900 MHZ 核磁共振波谱仪提案
  • 批准号:
    7254930
  • 财政年份:
    2003
  • 资助金额:
    $ 7.94万
  • 项目类别:
Proposal for Central California 900 MHZ NMR Spectrometer
加州中部 900 MHZ 核磁共振波谱仪提案
  • 批准号:
    6773840
  • 财政年份:
    2003
  • 资助金额:
    $ 7.94万
  • 项目类别:
Proposal for Central California 900 MHZ NMR Spectrometer
加州中部 900 MHZ 核磁共振波谱仪提案
  • 批准号:
    6899776
  • 财政年份:
    2003
  • 资助金额:
    $ 7.94万
  • 项目类别:
Proposal for Central California 900 MHZ NMR Spectrometer
加州中部 900 MHZ 核磁共振波谱仪提案
  • 批准号:
    7086403
  • 财政年份:
    2003
  • 资助金额:
    $ 7.94万
  • 项目类别:
Solid state NMR of prion peptides
朊病毒肽的固态核磁共振
  • 批准号:
    6578746
  • 财政年份:
    2002
  • 资助金额:
    $ 7.94万
  • 项目类别:
Structure Determination by NMR
NMR 结构测定
  • 批准号:
    6495130
  • 财政年份:
    2001
  • 资助金额:
    $ 7.94万
  • 项目类别:
Structural Studies of the Bacterial Transcription Factor NtrC
细菌转录因子 NtrC 的结构研究
  • 批准号:
    8050196
  • 财政年份:
    2001
  • 资助金额:
    $ 7.94万
  • 项目类别:
STRUCTURAL STUDIES OF THE BACTERIAL TRANSCRIPTION FACTOR
细菌转录因子的结构研究
  • 批准号:
    6490158
  • 财政年份:
    2001
  • 资助金额:
    $ 7.94万
  • 项目类别:
STRUCTURAL STUDIES OF THE BACTERIAL TRANSCRIPTION FACTOR
细菌转录因子的结构研究
  • 批准号:
    6225792
  • 财政年份:
    2001
  • 资助金额:
    $ 7.94万
  • 项目类别:

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