scholarly journals The rpoE gene encoding the sigma E (sigma 24) heat shock sigma factor of Escherichia coli.

1995 ◽  
Vol 14 (5) ◽  
pp. 1043-1055 ◽  
Author(s):  
S. Raina ◽  
D. Missiakas ◽  
C. Georgopoulos
Keyword(s):  
Escherichia Coli ◽  
Heat Shock ◽  
Sigma Factor ◽  
Gene Encoding ◽  
Sigma E

scholarly journals rpoE, the gene encoding the second heat-shock sigma factor, sigma E, in Escherichia coli.

1995 ◽  
Vol 14 (5) ◽  
pp. 1032-1042 ◽  
Author(s):  
P.E. Rouvière ◽  
A. De Las Peñas ◽  
J. Mecsas ◽  
C.Z. Lu ◽  
K.E. Rudd ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Heat Shock ◽  
Sigma Factor ◽  
Gene Encoding ◽  
Sigma E

scholarly journals opdA, a Salmonella enterica Serovar Typhimurium Gene Encoding a Protease, Is Part of an Operon Regulated by Heat Shock

2000 ◽  
Vol 182 (2) ◽  
pp. 518-521 ◽  
Author(s):  
Christopher A. Conlin ◽  
Charles G. Miller
Keyword(s):  
Escherichia Coli ◽  
Heat Shock ◽  
Sigma Factor ◽  
Salmonella Enterica ◽  
Salmonella Enterica Serovar Typhimurium ◽  
Temperature Shift ◽  
Open Reading Frame ◽  
Gene Encoding ◽  
Reading Frame ◽  
Serovar Typhimurium

ABSTRACT The opdA (prlC) gene of Salmonella enterica serovar Typhimurium and Escherichia coliencodes the metalloprotease oligopeptidase A (OpdA). We report thatopdA is cotranscribed with a downstream open reading frame,yhiQ. Transcription of this operon is induced after a temperature shift (30 to 42°C), and this induction depends on the heat shock sigma factor encoded by the rpoH(htpR) gene.

scholarly journals Isolation and characterization of Escherichia coli mutants that lack the heat shock sigma factor sigma 32.

1988 ◽  
Vol 170 (8) ◽  
pp. 3640-3649 ◽  
Author(s):  
Y N Zhou ◽  
N Kusukawa ◽  
J W Erickson ◽  
C A Gross ◽  
T Yura
Keyword(s):  
Escherichia Coli ◽  
Heat Shock ◽  
Sigma Factor ◽  
Isolation And Characterization ◽  
Sigma 32

scholarly journals Substitution of a Highly Conserved Histidine in the Escherichia coli Heat Shock Transcription Factor, σ32, Affects Promoter Utilization In Vitro and Leads to Overexpression of the Biofilm-Associated Flu Protein In Vivo

2007 ◽  
Vol 189 (23) ◽  
pp. 8430-8436 ◽  
Author(s):  
Olga V. Kourennaia ◽  
Pieter L. deHaseth
Keyword(s):  
Escherichia Coli ◽  
Heat Shock ◽  
Rna Polymerase ◽  
Sigma Factor ◽  
Stable Complex ◽  
Tryptophan Residue ◽  
Specific Sequence ◽  
Bacterial Rna

ABSTRACT The heat shock sigma factor (σ32 in Escherichia coli) directs the bacterial RNA polymerase to promoters of a specific sequence to form a stable complex, competent to initiate transcription of genes whose products mitigate the effects of exposure of the cell to high temperatures. The histidine at position 107 of σ32 is at the homologous position of a tryptophan residue at position 433 of the main sigma factor of E. coli, σ70. This tryptophan is essential for the strand separation step leading to the formation of the initiation-competent RNA polymerase-promoter complex. The heat shock sigma factors of all gammaproteobacteria sequenced have a histidine at this position, while in the alpha- and deltaproteobacteria, it is a tryptophan. In vitro the alanine-for-histidine substitution at position 107 (H107A) destabilizes complexes between the GroE promoter and RNA polymerase containing σ32, implying that H107 plays a role in formation or maintenance of the strand-separated complex. In vivo, the H107A substitution in σ32 impedes recovery from heat shock (exposure to 42°C), and it also leads to overexpression at lower temperatures (30°C) of the Flu protein, which is associated with biofilm formation.

scholarly journals Expression of a gene encoding a 16.9-kDa heat-shock protein, Oshsp16.9, in Escherichia coli enhances thermotolerance

1997 ◽  
Vol 94 (20) ◽  
pp. 10967-10972 ◽  
Author(s):  
C.-H. Yeh ◽  
P.-F. L. Chang ◽  
K.-W. Yeh ◽  
W.-C. Lin ◽  
Y.-M. Chen ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Heat Shock ◽  
Heat Shock Protein ◽  
Gene Encoding
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