By Walid El-Sharoud
The program of latest molecular methodologies within the research of bacterial behaviour and mobile structure has enabled new innovative insights and discoveries in those components. whereas this has additionally raised a couple of clinical mysteries approximately micro organism, it definitely stronger our figuring out of those organisms as complicated and adaptive entities instead of simply basic tiny buckets of enzymes. the price of this contemporary wisdom in bacterial body structure isn't just limited to primary biology, however it additionally extends to biotechnology and drug-discovery disciplines the place realizing telephone behaviour and constitution is vital for larger exploitation of worthy micro organism and powerful eradication of destructive ones. This makes a brand new textual content accommodating contemporary advancements in bacterial body structure hugely correct to a variety of readership together with these attracted to uncomplicated and utilized knowledge.
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Extra resources for Bacterial Physiology: A Molecular Approach
1999), and unless combined with mutations in rho, NusA is also essential in E. coli (Zhang and Friedman 1994). The structure of NusA is known and shows that it is an elongated molecule with several domains related to its function. The N-terminal domain is involved in binding RNAP (Mah et al. 1999), and this is followed by a flexible linker region that connects to an S1 RNA binding domain and a KH1 KH2 RNA binding domain. Although for many years NusA was assumed to be an RNA binding protein, it had always proved difficult to show this unequivocally.
181:3803–3809 Aussel L, Barre F-X, Aryoy M, Stasiak A, Stasiak AZ, Sherratt DJ (2002) FtsK is a DNA motor protein that activates chromosome dimer resolution by switching the catalytic state of the XerC and XerD recombinases. Cell. 108:195–205 Azam TA, Hiraga S, Ishihama A (2000) Two types of localization of the DNA-binding proteins within the Escherichia coli nucleoid. Genes Cells. 5:613–626 Bar-Nahum G, Nudler E (2001) Isolation and characterization of σ70-retaining transcription elongation complexes from Escherichia coli.
2005). This result confirmed the importance of NusA in rRNA transcription. The levels of NusA were also quantified and compared with that of RNAP. Surprisingly, NusA is highly abundant and is present at a very similar level to RNAP (~9,000 molecules of NusA to ~7,500 molecules of RNAP). 6 molecules of NusA to 1 RNAP in TF, whereas both proteins were present at a 1:1 ratio in regions of the nucleoid outside TF. Quantitative analysis of isolated transcription elongation complexes confirmed rRNA anti-termination complexes contained two molecules of NusA per molecule of RNAP, supporting the data of Horwitz et al.
Bacterial Physiology: A Molecular Approach by Walid El-Sharoud
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