Results 1 to 10 of about 158,365 (141)
Expression of each cistron in the gal operon can be regulated by transcription termination and generation of a galk-specific mRNA, mK2. [PDF]
J Bacteriol, 2014 ABSTRACT The gal operon of Escherichia coli has 4 cistrons, galE , galT , galK , and galM . In our previous report (H. J. Lee, H. J. Jeon, S. C. Ji, S. H. Yun, H. M. Lim, J. Mol. Biol.
Wang X +5 more
europepmc +6 more sources
DNA sequences in gal operon override transcription elongation blocks. [PDF]
J Mol Biol, 2008 The DNA loop that represses transcription from galactose (gal) promoters is infrequently formed in stationary-phase cells because the concentration of the loop architectural protein HU is significantly low at that state, resulting in expression of the operon in the absence of the gal inducer D-galactose.
Lewis DE +4 more
europepmc +7 more sources
A mutation defining ultrainduction of the Escherichia coli gal operon [PDF]
Journal of Bacteriology, 1991 Tn10 insertion in the galS (ultrainduction factor) gene of Escherichia coli allows the gal operon to be constitutively expressed at a very high level, equal to that seen in a delta galR strain in the presence of an inducer. The insertion has been mapped by criss-cross Hfr matings and by marker rescue into Kohara phages at 46 min on the E.
Amit Golding +4 more
semanticscholar +6 more sources
Systematic characterization of a novel gal operon in Thermoanaerobacter tengcongensis [PDF]
Microbiology, 2009 On the basis of the Thermoanaerobacter tengcongensis genome, a novel type of gal operon was deduced. The gene expression and biochemical properties of this operon were further characterized.
Qian Zhong +9 more
semanticscholar +5 more sources
Gene organization and structure of the Streptomyces lividans gal operon [PDF]
Journal of Bacteriology, 1988 We present the gene organization and DNA sequence of the Streptomyces lividans galactose utilization genes. Complementation of Escherichia coli galE, galT, or galK mutants and DNA sequence analysis were used to demonstrate that the galactose utilization genes are organized within an operon with the gene order galT, galE, and galK.
C W Adams +4 more
semanticscholar +5 more sources
Suppression of polarity of insertion mutations in the gal operon and N mutations in bacteriophage lambda [PDF]
Journal of Bacteriology, 1976 Bacterial mutations (psuA and psu) known for their ability to suppress the polarity on nonsense mutations are shown to suppress the polarity of certain insertion mutations in the gal operon. The short insertion, IS1 (800 nucleotide pairs), is about 15 to 50% suppressed, whereas longer insertions, IS2 (1,400 nucleotide pairs), and IS3 (1,200 nucleotide ...
Octavio Reyes López +2 more
semanticscholar +5 more sources
Further inducibility of a constitutive system: ultrainduction of the gal operon [PDF]
Journal of Bacteriology, 1991 In wild-type Escherichia coli, expression of the gal operon is negatively regulated by the Gal repressor and is induced 10- to 15-fold when the repressor is inactivated by an inducer. In strains completely deleted for galR, the gene which encodes the Gal repressor, the operon is derepressed by only 10-fold without an inducer.
J P Tokeson, Susan Garges, Sankar Adhya
semanticscholar +5 more sources
Transcriptional Regulation of the Streptococcus mutans gal Operon by the GalR Repressor [PDF]
Journal of Bacteriology, 1998 ABSTRACT The galactose operon of Streptococcus mutans is transcriptionally regulated by a repressor protein (GalR) encoded by the galR gene, which is divergently oriented from the structural genes of the gal operon.
Dragana Ajdić, Joseph J. Ferretti
semanticscholar +5 more sources
Regulation of the gal Operon of Escherichia coli by the capR Gene
Journal of Biological Chemistry, 1972 Abstract We have examined in greater detail the derepression of uridine diphosphate galactose-4-epimerase synthesis in capR mutants of Escherichia coli first observed by Markovitz. (Markovitz, A. (1964) Proc. Nat. Acad. Sci. U. S. A. 51, 239–246). All three enzymes of the gal operon are derepressed from 2- to 4-fold by this mutation.
George A. Mackie, David B. Wilson
semanticscholar +5 more sources
Escherichia coli gal operon proteins made after prophage lambda induction [PDF]
Journal of Bacteriology, 1981 Expression of the EScherichia coli gal operon under the control of the prophage lambda promoter pL leads to gross discoordinacy of gal expression. Expression of the most promoter-distal cistron galK is much greater than expression of the promoter-proximal cistron galE.
C R Merril +2 more
semanticscholar +4 more sources