background: trichomonas vaginalis causes trichomoniasis and metronidazole is its chosen drug for treatment. ferredoxin has role in electron transport and carbohydrate metabolism and the conversion of an inactive form of metronidazole (co) to its active form (cpr). ferredoxin gene mutations reduce gene expression and increase its resistance to metronidazole. in this study, the frequency of ferre...

BACKGROUND Trichomonas vaginalis causes trichomoniasis and metronidazole is its chosen drug for treatment. Ferredoxin has role in electron transport and carbohydrate metabolism and the conversion of an inactive form of metronidazole (CO) to its active form (CPR). Ferredoxin gene mutations reduce gene expression and increase its resistance to metronidazole. In this study, the frequency of ferred...

Metronidazole [1-(2-hydroxyethyl)-2-methyl-5-nitroimidazole] is used to treat infections caused by Trichomonas vaginalis, a sexually transmitted human parasite. This drug is administered in an inactive form and is reduced to its cytotoxic form within the hydrogenosome, an unusual organelle found in trichomonads. Metronidazole reduction occurs via ferredoxin-mediated electron transport. We have ...

Pseudomonas abietaniphila BKME-9 is able to degrade dehydroabietic acid (DhA) via ring hydroxylation by a novel dioxygenase. The ditA1, ditA2, and ditA3 genes, which encode the alpha and beta subunits of the oxygenase and the ferredoxin of the diterpenoid dioxygenase, respectively, were isolated and sequenced. The ferredoxin gene is 9. 2 kb upstream of the oxygenase genes and 872 bp upstream of...

The hyperthermophilic archaea Pyrococcus furiosus and Thermococcus litoralis contain the tungstoenzymes aldehyde ferredoxin oxidoreductase, a homodimer, and formaldehyde ferredoxin oxidoreductase, a homotetramer. herein we report the cloning and sequencing of the P. furiosus gene aor (605 residues; M(r), 66,630) and the T. litoralis gene for (621 residues; M(r), 68,941).

The 7Fe ferredoxin of Rhodobacter capsulatus (FdII) could be expressed in Escherichia coli by cloning the fdxA gene coding for FdII downstream from the lac promoter. The expressed recombinant ferredoxin appeared as a brown protein which was specifically recognized in E. coli cell-free extracts by anti-FdII serum. The purified recombinant ferredoxin was indistinguishable from R. capsulatus FdII ...

The complete amino acid sequence of the [4Fe-4S] ferredoxin from Desulfovibrio desulfuricans Norway was determined by repetitive Edman degradation of the whole protein and peptides derived from tryptic digestion. The protein has 59 residues. Four of the six cysteine residues are involved in the binding of the [4Fe-4S] cluster in the same arrangement as in clostridial ferredoxins. This sequence ...

Southern hybridization analysis of the genomes from the newly-isolated 10 carbazole (CAR)-utilizing bacteria revealed that 8 of the isolates carried gene clusters homologous to the CAR-catabolic car operon of Pseudomonas resinovorans strain CA10. Sequencing analysis showed that two car operons and the neighboring regions of Pseudomonas sp. strain K23 are nearly identical to that of strain CA10....

The gene for ferredoxin from the hyperthermophilic archaeon Pyrococcus furiosus was cloned, sequenced, and expressed in Escherichia coli. The coding region confirmed the determined amino acid sequence. Putative archaeon-type transcriptional regulatory elements were identified. The fdxA gene appears to be an independent transcriptional unit. Recombinant ferredoxin was indistinguishable from the ...