The soybeanEu3gene encodes an Ni-binding protein necessary for urease activity
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MecA, an adaptor protein necessary for ClpC chaperone activity.
ClpC of Bacillus subtilis is an ATP-dependent HSP100Clp protein involved in general stress survival. A complex of ClpC with the protease ClpP and the adaptor protein MecA also controls competence development by regulated proteolysis of the transcription factor ComK. We investigated the in vitro chaperone activity of ClpC and found that the presence of MecA was crucial for the major chaperone ac...
متن کاملMua (HP0868) Is a Nickel-Binding Protein That Modulates Urease Activity in Helicobacter pylori
UNLABELLED A novel mechanism aimed at controlling urease expression in Helicobacter pylori in the presence of ample nickel is described. Higher urease activities were observed in an hp0868 mutant (than in the wild type) in cells supplemented with nickel, suggesting that the HP0868 protein (herein named Mua for modulator of urease activity) represses urease activity when nickel concentrations ar...
متن کاملThe malaria parasite Plasmodium falciparum encodes members of the Puf RNA-binding protein family with conserved RNA binding activity.
A novel class of RNA-binding proteins, Puf, regulates translation and RNA stability by binding to specific sequences in the 3'-untranslated region of target mRNAs. Members of this protein family share a conserved Puf domain consisting of eight 36 amino acid imperfect repeats. Here we report two Puf family member genes, PfPuf1 and PfPuf2, from the human malaria parasite Plasmodium falciparum. Bo...
متن کاملThe COQ7 gene encodes a protein in saccharomyces cerevisiae necessary for ubiquinone biosynthesis.
Ubiquinone (coenzyme Q) is a lipid that transports electrons in the respiratory chains of both prokaryotes and eukaryotes. Mutants of Saccharomyces cerevisiae deficient in ubiquinone biosynthesis fail to grow on nonfermentable carbon sources and have been classified into eight complementation groups (coq1 coq8; Tzagoloff, A., and Dieckmann, C. L.(1990) Microbiol. Rev. 54, 211-225). In this stud...
متن کاملCharacterization of the Klebsiella aerogenes urease accessory protein UreD in fusion with the maltose binding protein.
Assembly of the Klebsiella aerogenes urease metallocenter requires four accessory proteins, UreD, UreE, UreF, and UreG, to effectively deliver and incorporate two Ni2+ ions into the nascent active site of the urease apoprotein (UreABC). Each accessory protein has been purified and characterized with the exception of UreD due to its insolubility when it is overproduced in recombinant cells. In t...
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ژورنال
عنوان ژورنال: The Plant Journal
سال: 2000
ISSN: 0960-7412
DOI: 10.1046/j.1365-313x.2000.00655.x