Bacterial transcription

Chapter 8 - Major shifts in bacterial transcription. In this chapter, students will be able to understand: Sigma factor switching, the RNA polymerase encoded in phage T7, infection of E. coli by phage λ,...and another contents.

40p tangtuy05 30-03-2016 51 4   Download

In chapter 7 we will explore one strategy bacteria employ to control the expression of their genes: by grouping functionally related genes together so they can be regulated together easily. Such a group of contiguous, coordinately controlled genes is called an operon.

49p tangtuy05 30-03-2016 56 2   Download

Chapter 11 - general transcription factors in eukaryotes. Eukaryotic RNA polymerases, unlike their bacterial counterparts, are incapable of binding by themselves to their respective promoters. Instead, they rely on proteins called transcription factors to show them the way. Such factors are grouped into two classes: general transcription factors and gene-specifi c transcription factors (activators). In this chapter we will survey the general transcription factors that interact with all three RNA polymerases and their promoters.

38p tangtuy05 30-03-2016 80 3   Download

Ligand binding by the aryl hydrocarbon receptor (AhR), a member of the bHLH-PAS family of transcriptional reg-ulatory proteins, has been mapped to a region within the second ÔPASÕ domain, a conserved sequence motif ®rst discovered in the Per-ARNT-Sim family of proteins.

6p research12 29-04-2013 43 3   Download

Cold shock proteins (CSPs) form a family of highly conserved bacterial proteins capable of single-stranded nucleic acid binding. They are suggested to act as RNA chaperones during cold shock inhibiting the formation of RNA secondary structures, which are unfavourable for transcription and translation.

12p fptmusic 12-04-2013 37 2   Download

Cyclooxygenase-2 (COX-2) is a key enzyme in the production of prosta-glandins that are major inflammatory agents. COX-2 production is trig-gered by exposure to various cytokines and to bacterial endotoxins. We present here a novel role for the Ets transcription factor ESE-1 in regula-ting the COX-2gene in response to endotoxin and other pro-inflammatory stimuli. We report that the induction of COX-2expression by lipopoly-saccharide (LPS) and pro-inflammatory cytokines correlates with ESE-1 induction in monocyte⁄macrophages. ...

12p awards 06-04-2013 38 3   Download

Bacterial cold shock proteins (CSPs) regulate cellular adaptation to cold stress. Functions ascribed to CSP include roles as RNA chaperones and in transcription antitermination. We present the crystal structure of the Bacil-lus caldolyticus CSP (Bc-Csp) in complex with hexathymidine (dT6)ata resolution of 1.29 A ˚ .

15p galaxyss3 21-03-2013 38 5   Download

The bacterial tetracycline transcription regulation system mediated by the tetracycline repressor (TetR) is widely used to study gene expression in prokaryotes and eukaryotes. To study multiple genes in parallel, a triple mutant TetR(K 64 L 135 I 138 ) has been engineered that is selectively induced by the synthetic tetracycline derivative 4-de-dimethylamino-anhydrotetracy-cline (4-ddma-atc) and no longer by tetracycline, the inducer of wild-type TetR. In the present study

12p viettel02 20-02-2013 31 3   Download

The iron responsive regulator Irr is found in a wide range ofa-proteobac-teria, where it regulates many genes in response to the essential but toxic metal iron. Unlike Fur, the transcriptional regulator that is used for iron homeostasis by almost all other bacterial lineages, Irr does not sense Fe 2+ directly, but, rather, interacts with a physiologically important form of iron, namely heme.

11p cosis54 05-01-2013 39 4   Download

Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học Wertheim cung cấp cho các bạn kiến thức về ngành y đề tài: Premature terminator analysis sheds light on a hidden world of bacterial transcriptional attenuation...

17p thulanh22 20-11-2011 36 1   Download

Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học General Psychiatry cung cấp cho các bạn kiến thức về ngành y đề tài: Investigation of infectious agents associated with arthritis by reverse transcription PCR of bacterial rRNA...

8p thulanh11 11-10-2011 38 4   Download