Zobrazeno 1 - 10
of 54
pro vyhledávání: '"Werner Klipp"'
Autor:
Meike Gendrullis, Bernd Masepohl, Werner Klipp, Daphne Giaourakis, Karsten Raabe, Thomas Drepper
Publikováno v:
FEMS Microbiology Letters. 215:221-227
The Rhodobacter capsulatus nrfA gene product exhibits extensive similarity to the nif (nitrogen fixation) regulatory factor NrfA of Azorhizobium caulinodans and the nucleoid-associated protein Hfq of Escherichia coli. Mutational analysis revealed tha
Publikováno v:
FEMS Microbiology Letters. 200:207-213
Expression of nitrogen fixation genes in Rhodobacter capsulatus is repressed by ammonium at different regulatory levels including an NtrC-independent mechanism controlling NifA activity. In contrast to R. capsulatus NifA, heterologous NifA proteins o
Publikováno v:
European Journal of Biochemistry. 268:1940-1952
In all diazotrophic micro-organisms investigated so far, mutations in nifE, one of the genes involved in the biosynthesis of the FeMo cofactor (FeMoco), resulted in the accumulation of cofactorless inactive dinitrogenase. In this study, we have found
Autor:
Silke Leimkühler, Werner Klipp
Publikováno v:
Journal of Bacteriology. 181:2745-2751
Rhodobacter capsulatus xanthine dehydrogenase (XDH) is composed of two subunits, XDHA and XDHB. Immediately downstream of xdhB , a third gene was identified, designated xdhC , which is cotranscribed with xdhAB . Interposon mutagenesis revealed that t
Autor:
Werner Klipp, Silke Leimkühler
Publikováno v:
FEMS Microbiology Letters. 174:239-246
The requirement of MobA for molybdoenzymes with different molybdenum cofactors was analyzed in Rhodobacter capsulatus. MobA is essential for DMSO reductase and nitrate reductase activity, both enzymes containing the molybdopterin guanine dinucleotide
Autor:
Silke Leimkühler, Werner Klipp, Monika Kern, Ralf R. Mendel, Alastair G. McEwan, Günter Schwarz, Peter S. Solomon
Publikováno v:
Molecular Microbiology. 27:853-869
Fourteen Rhodobacter capsulatus mutants unable to grow with xanthine as sole nitrogen source were isolated by random Tn5 mutagenesis. Five of these Tn5 insertions were mapped within two adjacent chromosomal EcoRI fragments hybridizing to oligonucleot
Publikováno v:
Journal of Bacteriology. 178:2010-2017
The alternative nitrogenase of Rhodobacter capsulatus is expressed only under conditions of nitrogen and molybdenum depletion. The analysis of anfA-lacZ fusions demonstrated that this dual control occurred at the level of transcription of anfA, which
Publikováno v:
Molecular Microbiology. 19:1307-1318
Summary The prototrophic bacterium Rhodobacter sphaeroides DSM 158 has a periplasmic nitrate reductase which is induced by nitrate and it is not repressed by ammonium or oxygen. In a Tn5 mutant lacking nitrate reductase activity, transposon insertion
Publikováno v:
Journal of Bacteriology. 177:6432-6439
Four Rhodobacter capsulatus mutants unable to grow with proline as the sole nitrogen source were isolated by random Tn5 mutagenesis. The Tn5 insertions were mapped within two adjacent chromosomal EcoRI fragments. DNA sequence analysis of this region
Publikováno v:
European Journal of Biochemistry. 231:742-746
The fdxN gene from Rhizobium meliloti encoding a bacterial-type ferredoxin (FdxN) was expressed in Escherichia coil under the control of the lac promoter. The fdxN gene product was purified under anaerobic conditions by ion-exchange chromatography an