JMB-HEADER RAS-JOURNALS EIMB Pleiades Publishing

RUS

             

ENG

YearIMPACT-FACTOR
2022  1,200
2021  1,540
2020  1,374
2019  1,023
2018  0,932
2017  0,977
2016  0,799
2015  0,662
2014  0,740
2013  0,739
2012  0,637
2011  0,658
2010  0,654
2009  0,570
2008  0,849
2007  0,805
2006  0,330
2005  0,435
2004  0,623
2003  0,567
2002  0,641
2001  0,490
2000  0,477
1999  0,762
1998  0,785
1997  0,507
1996  0,518
1995  0,502
Vol 44(2010) N 3 p. 439-447;
M.N. Tutukina, K.S. Shavkunov, I.S. Masulis, O.N. Ozoline*

Antisense Transcription within the hns Locus of Escherichia coli

Institute of cell biophysics RAS, Pushchino, 142290 Russia

*ozoline@icb.psn.ru
Received - 2009-08-04; Accepted - 2009-11-23

Scanning the entire genome of Escherichia coli by means of pattern-recognition software PlatProm spotted out more than a thousand of potential start points for antisense transcription. Taking into account possible role of antisense RNAs in the cell regulatory networks, our top-priority interest was focused on the promoter-like sites found within genes of transcription regulators. One of them (hns) encodes a major nucleoid protein affecting expression pattern of many genomic loci. Several potential start points for antisense transcription were found within its coding sequence. Gel-retardation assays, potassium permanganate and DNAse I footprintings confirmed the ability of the intragenic promoter located ~280 bp downstream of ATG to bind RNA polymerase. Primer extension revealed the cDNA of the expected size while Northern blot hybridization assumes the presence of aRNA among cellular RNAs. Relative abundance of aRNA and hns-mRNA in vivo exhibited dependence on growth conditions thus assuming existence of regulatory pathways keeping cellular concentration of these two transcripts at the optimal level.

Escherichia coli, PlatProm software, promoter, antisense RNAs



JMB-FOOTER RAS-JOURNALS