Identification of the mycobacterial DNA-binding protein 1 region which suppresses transcription in vitro

2001 ◽  
Vol 30 (3) ◽  
pp. 129-138 ◽  
Author(s):  
Makoto Furugen ◽  
Sohkichi Matsumoto ◽  
Takemitsu Matsuo ◽  
Makoto Matsumoto ◽  
Takeshi Yamada
Keyword(s):  
Dna Binding ◽  
Binding Protein ◽  
Dna Binding Protein ◽  
Transcription In Vitro

Inhibition of adenovirus early region IV transcription in vitro by a purified viral DNA binding protein

Nature ◽  
1983 ◽  
Vol 302 (5908) ◽  
pp. 545-547 ◽  
Author(s):  
Hiroshi Handa ◽  
Robert E. Kingston ◽  
Phillip A. Sharp
Keyword(s):  
Dna Binding ◽  
Binding Protein ◽  
Dna Binding Protein ◽  
Viral Dna ◽  
Early Region ◽  
Transcription In Vitro

scholarly journals The DNA-binding protein HTa from Thermoplasma acidophilum is an archaeal histone analog

eLife ◽  
2019 ◽  
Vol 8 ◽  
Author(s):  
Antoine Hocher ◽  
Maria Rojec ◽  
Jacob B Swadling ◽  
Alexander Esin ◽  
Tobias Warnecke
Keyword(s):  
Dna Binding ◽  
Binding Protein ◽  
Dna Binding Protein ◽  
Coli Strain ◽  
Micrococcal Nuclease ◽  
Thermoplasma Acidophilum ◽  
Chromatin Architecture ◽  
Archaeal Histone

Histones are a principal constituent of chromatin in eukaryotes and fundamental to our understanding of eukaryotic gene regulation. In archaea, histones are widespread but not universal: several lineages have lost histone genes. What prompted or facilitated these losses and how archaea without histones organize their chromatin remains largely unknown. Here, we elucidate primary chromatin architecture in an archaeon without histones, Thermoplasma acidophilum, which harbors a HU family protein (HTa) that protects part of the genome from micrococcal nuclease digestion. Charting HTa-based chromatin architecture in vitro, in vivo and in an HTa-expressing E. coli strain, we present evidence that HTa is an archaeal histone analog. HTa preferentially binds to GC-rich sequences, exhibits invariant positioning throughout the growth cycle, and shows archaeal histone-like oligomerization behavior. Our results suggest that HTa, a DNA-binding protein of bacterial origin, has converged onto an architectural role filled by histones in other archaea.

scholarly journals The Bacterial DNA Binding Protein MatP Involved in Linking the Nucleoid Terminal Domain to the Divisome at Midcell Interacts with Lipid Membranes

mBio ◽  
2019 ◽  
Vol 10 (3) ◽  
Author(s):  
Begoña Monterroso ◽  
Silvia Zorrilla ◽  
Marta Sobrinos-Sanguino ◽  
Miguel Ángel Robles-Ramos ◽  
Carlos Alfonso ◽  
...  
Keyword(s):  
Dna Binding ◽  
Dna Sequences ◽  
Lipid Membranes ◽  
Binding Protein ◽  
Dna Binding Protein ◽  
Content Type ◽  
E Coli ◽  
Daughter Cells ◽  
Z Ring

ABSTRACTDivision ring formation at midcell is controlled by various mechanisms inEscherichia coli, one of them being the linkage between the chromosomal Ter macrodomain and the Z-ring mediated by MatP, a DNA binding protein that organizes this macrodomain and contributes to the prevention of premature chromosome segregation. Here we show that, during cell division, just before splitting the daughter cells, MatP seems to localize close to the cytoplasmic membrane, suggesting that this protein might interact with lipids. To test this hypothesis, we investigated MatP interaction with lipidsin vitro. We found that, when encapsulated inside vesicles and microdroplets generated by microfluidics, MatP accumulates at phospholipid bilayers and monolayers matching the lipid composition in theE. coliinner membrane. MatP binding to lipids was independently confirmed using lipid-coated microbeads and biolayer interferometry assays, which suggested that the recognition is mainly hydrophobic. Interaction of MatP with the lipid membranes also occurs in the presence of the DNA sequences specifically targeted by the protein, but there is no evidence of ternary membrane/protein/DNA complexes. We propose that the association of MatP with lipids may modulate its spatiotemporal localization and its recognition of other ligands.IMPORTANCEThe division of anE. colicell into two daughter cells with equal genomic information and similar size requires duplication and segregation of the chromosome and subsequent scission of the envelope by a protein ring, the Z-ring. MatP is a DNA binding protein that contributes both to the positioning of the Z-ring at midcell and the temporal control of nucleoid segregation. Our integratedin vivoandin vitroanalysis provides evidence that MatP can interact with lipid membranes reproducing the phospholipid mixture in theE. coliinner membrane, without concomitant recruitment of the short DNA sequences specifically targeted by MatP. This observation strongly suggests that the membrane may play a role in the regulation of the function and localization of MatP, which could be relevant for the coordination of the two fundamental processes in which this protein participates, nucleoid segregation and cell division.

In vitro transcription termination activity of the Drosophila mitochondrial DNA-binding protein DmTTF

2005 ◽  
Vol 331 (1) ◽  
pp. 357-362 ◽  
Author(s):  
Marina Roberti ◽  
Patricio Fernandez-Silva ◽  
Paola Loguercio Polosa ◽  
Erika Fernandez-Vizarra ◽  
Francesco Bruni ◽  
...  
Keyword(s):  
Mitochondrial Dna ◽  
Dna Binding ◽  
Binding Protein ◽  
Transcription Termination ◽  
Dna Binding Protein ◽  
In Vitro Transcription ◽  
Termination Activity
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