2.7.7.6 CK2 is associated with Pol I, the initiation-competent subclass of Pol I, CK2 phosphorylates a number of proteins involved in Pol I transcription and pre-rRNA processing, including UBF, TIF-IA, SL1/TIF-IB, topoisomerase IIa, nucleolin, and nucleophosmin, overview 701717 2.7.7.6 Ctk1 the kinase is required for the stability of the scaffold, but Ctk1 kinase activity is not required for the dissociation of basal transcription factors 703448 2.7.7.6 glutamate glutamate remodels the sigma38 transcription complex for activation. Accumulation of the simple signaling molecule glutamate can reprogram RNA polymerase in vitro without the need for specific protein receptors. During osmotic activation, glutamate appears to act as a Hofmeister series osmolyte to facilitate promoter escape. Escape is accompanied by a remodeling of the key interaction between the sigma38 stress protein and the beta-flap of the bacterial core RNA polymerase. This activation event contrasts with the established mechanism of inhibition in which glutamate, by virtue of its electrostatic properties, helps to inhibit binding to ribosomal promoters after osmotic shock 702224 2.7.7.6 histone-like nucleoid structuring protein i.e. H-NS, H-NS stimulates transcription from the F3 fragment, it can facilitate specific DNA-binding by RNA polymerase in AT-rich gene regulatory regions. Correct positioning of RNA polymerase at PehxCABD requires H-NS. Footprint of RNA polymerase (s70 RC461-FeBABE) interactions with -10 elements in the ehxCABD regulatory region in the presence of H-NS, overview 739400 2.7.7.6 additional information interaction of elongation factors with RNAP, such as NusG and RfaH, affects the frequency and duration of pausing during transcription 705530 2.7.7.6 additional information intermittent hypoxia, a major pathological factor in the development of neural deficits associated with sleep-disordered breathing, regulates RNA polymerase II in hippocampus and prefrontal cortex. Chronic intermittent hypoxia, but not sustained hypoxia, stimulates hydroxylation of Pro1465 in large subunit of RNA polymerase II and phosphorylation of Ser5 of Rpb1, specifically in the CA1 region of the hippocampus and in the prefrontal cortex but not in other regions of the brain, requiring the von Hippel-Lindau tumor suppressor. Mice exposed to chronic IH demonstrated cognitive deficits related to dysfunction in those brain regions 705928 2.7.7.6 additional information lipopolysaccharides enhance the binding of the enzyme to the iNOS promoter. GlcN enhances RNAPII O-GlcNAcylation, but inhibits iNOS promoter binding 738954 2.7.7.6 additional information mechanism of activation of antibiotic biosynthesis by Nonomuraea rpoB(R), overview 704319 2.7.7.6 additional information Pol III initiates and reinitiates transcription in the absence or presence of transcription factors, during the first transcription cycle transcription factors IIIB and IIIC mainly contribute to the selectivity and not to the rate of Pol III association to the template, while their stable association with the promoter in subsequent cycles strongly contributes to the high rate of transcription reinitiation by Pol III 691700 2.7.7.6 additional information RNA polymerase complex with associated proteins, overview 703458 2.7.7.6 additional information RNAP contains the vegetative sigma subunit sigma70 (RpoD) and/or the flagellar sigma factor sigma28 (FliA) 723296 2.7.7.6 additional information The activity of basal Pol I factors is regulated by posttranslational modifications 701717 2.7.7.6 additional information the archaeal Pol II-like transcription apparatus requires the general transcription factors TBP, TFB, TFE and TFS 703354 2.7.7.6 additional information the enzyme complex requires basal transcription factors, i.e. TFIID, TFIIA, TFIIH, and TFIIE, for complete processing of transitions from initiation to elongation, overview 703448 2.7.7.6 additional information the enzyme complex requires multiple transcription factors and protein interactions for activity, e.g. Spt6, overview 703444 2.7.7.6 additional information the Pol II transcription apparatus requires the transcription factors TBP, TFIIB, TFIIEalpha and TFIIS 703354 2.7.7.6 additional information the RNA polymerase complex requires several transcription factors for activity, e.g. the general transcription factors, TBP, TFIIA, TFIIB, TFIIF, and TFIIE 704671 2.7.7.6 PAF53 a 53-kDa protein that is associated with Pol I, recruitment of Pol I to the pre-initiation complex requires the interaction of UBF with SL1/TIF-IB and with PAF53 701717 2.7.7.6 potassium acetate activates 702224 2.7.7.6 potassium aspartate activates 702224 2.7.7.6 potassium chloride activates 702224 2.7.7.6 potassium glutamate activates highly, role of potassium ion in the activation of osmotic transcription 702224 2.7.7.6 potassium nitrate activates 702224 2.7.7.6 Rho in response to the Rho termination factor, RNA synthesis ceases and the completed transcript is released 705530 2.7.7.6 RNase P required for Pol I and Pol III required 694828 2.7.7.6 sigma factor a dissociable specificity sigma factor, regulated by factors such as anti-sigma factors, which can sequester r factors and prevent core association, and possibly by factors that enhance sigma-core association 705530 2.7.7.6 sigma factor a dissociable specificity sigma factor, regulated by factors such as anti-sigma factors, which can sequester sigma factors and prevent core association, and possibly by factors that enhance sigma-core association 705530 2.7.7.6 sigma factor required for activity 706598 2.7.7.6 sigma70 the sigma factor increases the transcription efficiency of templates with nonphysiological nonprokaryotic promoters 721305 2.7.7.6 spermidine - 721368 2.7.7.6 spermidine optimal activity at pH 8.5 is obtained in presence of 18 mM MgCl2, 200 mM KCl, 1 mM thermine and 1 mM spermidine 643562 2.7.7.6 Spt5 the large subunit of the DRB sensitivity-inducing factor, DSIF, represses or activates RNAPII elongation in vitro. CTR1 and CTR2CT, the two repeat-containing regions constituting the C-terminus of Spt5, play a redundant role in repressing RNAPII elongation in vivo, overview. Mutant NSpt5, lacking the C-terminus, directly associates with hsp70-4 chromatin in vivo and increases the occupancy of RNAPII, positive transcription elongation factor b, histone H3 Lys 4 trimethylation, and surprisingly, the negative elongation factor A at the locus, indicating a direct action of NSpt5 on the elongation repressed locus, nuclear extracts containing the constitutively active P-TEFb and WT DSIF lead to a time-dependent increase of the long, promoter-distal RNase T1-resistant products, reflecting the elongation stimulatory activity of Spt5, overview 706434 2.7.7.6 Spt6 transcription factor, Pol II shows a broad requirement for essential Spt6 during different stages of development, e.g. for for maximal recruitment of Paf1 and Spt5 to transcriptionally active Hsp70. Spt6 interacts with both nucleosome structure and Pol II, it has a role in elongation, directed RNAi knock-down of Spt6 reduces the elongation rate, the Spt6-dependent effect on elongation rate persists during steady-state-induced transcription, reducing the elongation rate from about 1100 to 500 bp/min. Stimulation of Pol II elongation rate by Spt6 is not mediated through transcription factor TFIIS 703444 2.7.7.6 TAFI protein performs important tasks in transcription complex assembly, mediating specific interactions between the rDNA promoter and Pol I, thereby recruiting Pol I, together with a collection of Pol I-associated factors, to rDNA 701717 2.7.7.6 TFB2 the essential initiation factor forms a network of interactions with DNA near the transcription start site and facilitates promoter melting but may not be essential for promoter recognition, TFB2 bridges upstream and downstream promoter contacts of the initiation complex, mapping of TFB2-DNA interactions at the transcription start site, overview 703150 2.7.7.6 TFB2M the requirement for TFB2M in transcription of dsDNA is that it can stabilize an incompletely single-stranded template established by negative supercoiling 703854 2.7.7.6 TFIIIE a basal transcription factor, complexes with several ribosomal proteins and enhances tRNA and 5S rRNA transcription of the RNA polymerase, regualtion, overview 702030 2.7.7.6 TFIIS an RNA cleavage stimulatory factor TFIIS. TFIIS can rescue an arrested polymerase by creating a new RNA 3' end at the active site from which transcription can resume, mechanism, overview 701466 2.7.7.6 thermine optimal activity at pH 8.5 is obtained in presence of 18 mM MgCl2, 200 mM KCl, 1 mM thermine and 1 mM spermidine 643562 2.7.7.6 TIF-IB/SL 1 Pol I promoter specificity is conferred by TIF-IB/SL1, a protein complex containing the TATA binding protein and five TATA binding protein-associated factors, including TAFI110/95, TAFI68, TAFI48, TAFI35, and TAFI12 701717 2.7.7.6 transcription factor TFIIIB proper initiation by RNA pol III requires the transcription factor TFIIIB. Gene-external U6 snRNA transcription requires TFIIIB consisting of Bdp1, TBP, and Brf2. Transcription from the gene internal tRNA promoter requires TFIIIB composed of Bdp1, TBP, and Brf1. Breast cancer susceptibility gene 1, BRCA1, inhibits TFIIB, which interacts with the BRCA1 C-terminal region domain of Fcp1p, an RNA polymerase II phosphatase, TFIIIB regulation network, overview 705139 2.7.7.6 upstream binding factor UBF, activates rRNA gene transcription by several means, for example, by recruiting Pol I to the rDNA promoter, by stabilizing binding of TIF-IB/SL1, and by displacing nonspecific DNA binding proteins such as histone H1. And UBF has additional roles in regulation of Pol I promoter escape and transcription elongation 701717