Literature DB >> 15702537

Influence of Escherichia coli DnaK and DnaJ molecular chaperones on tryptophanase (TnaA) amount and GreA, GreB stability.

A M Grudniak1, B Nowicka-Sans, M Maciag, K I Wolska.   

Abstract

The amount of tryptophanase was estimated in Escherichia coli deltadnaJ and deltadnaKdnaJ mutants. Densitometric analysis of polyacrylamide gels demonstrated that the amount of tryptophanase was diminished in both mutants. DnaK and DnaJ molecular chaperones apparently influence the amount of tryptophanase, the expression of which is regulated at all transcription steps, including transcription elongation. The half-life of GreA and GreB proteins (being activators of transcription elongation of the tna operon) are diminished in both mutants suggesting the involvement of DnaK and DnaJ in the stability of these proteins.

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Year:  2004        PMID： 15702537     DOI： 10.1007/bf02931525

Source DB:  PubMed          Journal:  Folia Microbiol (Praha)        ISSN： 0015-5632            Impact factor:   2.099


  34 in total

1.  Physiological consequences of mutations in Escherichia coli heat shock dnaK and dnaJ genes.

Authors:  K I Wolska; J Paciorek; K Kardyś
Journal:  Microbios       Date:  1999

Review 2.  [The role of GreA and GreB factors in bacterial transcription elongation].

Authors:  B Nowicka-Sans; K I Wolska
Journal:  Postepy Biochem       Date:  2001

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Authors:  R Ohki; T Kawamata; Y Katoh; F Hosoda; M Ohki
Journal:  J Biol Chem       Date:  1992-07-05       Impact factor: 5.157

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Authors:  B D DAVIS; E S MINGIOLI
Journal:  J Bacteriol       Date:  1950-07       Impact factor: 3.490

5.  The RNA-DNA hybrid maintains the register of transcription by preventing backtracking of RNA polymerase.

Authors:  E Nudler; A Mustaev; E Lukhtanov; A Goldfarb
Journal:  Cell       Date:  1997-04-04       Impact factor: 41.582

6.  Cleavage of structural proteins during the assembly of the head of bacteriophage T4.

Authors:  U K Laemmli
Journal:  Nature       Date:  1970-08-15       Impact factor: 49.962

7.  Regulation of the Escherichia coli heat-shock response.

Authors:  B Bukau
Journal:  Mol Microbiol       Date:  1993-08       Impact factor: 3.501

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Authors:  M J Casadaban; S N Cohen
Journal:  J Mol Biol       Date:  1980-04       Impact factor: 5.469

9.  Evidence suggesting cis action by the TnaC leader peptide in regulating transcription attenuation in the tryptophanase operon of Escherichia coli.

Authors:  K Gish; C Yanofsky
Journal:  J Bacteriol       Date:  1995-12       Impact factor: 3.490

10.  Role of the Escherichia coli DnaK and DnaJ heat shock proteins in the initiation of bacteriophage lambda DNA replication.

Authors:  K Liberek; C Georgopoulos; M Zylicz
Journal:  Proc Natl Acad Sci U S A       Date:  1988-09       Impact factor: 11.205
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