title: Molecular analysis of the gene encoding F420-dependent glucose-6-phosphate dehydrogenase from Mycobacterium smegmatis.
abstract: The gene fgd, which codes for F420-dependent glucose-6-phosphate dehydrogenase (FGD), was cloned from Mycobacterium smegmatis, and its sequence was determined and analyzed. A homolog of FGD which has a very high similarity to the M. smegmatis FGD-derived amino acid sequence was identified in Mycobacterium tuberculosis. FGD showed significant homology with F420-dependent N5,N10-methylene-tetrahydromethanopterin reductase (MER) from methanogenic archaea and with several hypothetical proteins from M. tuberculosis and Archaeoglobus fulgidus, but FGD showed no significant homology with NADP-dependent glucose-6-phosphate dehydrogenases. Multiple alignment of FGD and MER proteins revealed four conserved consensus sequences. Multiple alignment of FGD with the hypothetical proteins also revealed portions of the same conserved sequences. Moderately high levels of FGD were expressed in Escherichia coli BL21(DE3) carrying fgd in pBluescript.
authors.affiliation: Department of Microbiology, University of Iowa, Iowa City 52242, USA.
authors.forename: E
authors.initials: E
authors.lastname: Purwantini
authors.forename: L
authors.initials: L
authors.lastname: Daniels
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D016384:Consensus Sequence; D017124:Conserved Sequence; D005798:Genes, Bacterial; D005954:Glucosephosphate Dehydrogenase / Q000096:biosynthesis / Q000737:chemistry / Q000235:genetics*; D008969:Molecular Sequence Data; D009161:Mycobacterium / Q000201:enzymology* / Q000235:genetics; D000587:Oxidoreductases Acting on CH-NH Group Donors / Q000737:chemistry*; D011994:Recombinant Proteins / Q000096:biosynthesis / Q000737:chemistry; D015183:Restriction Mapping; D016415:Sequence Alignment; D017386:Sequence Homology, Amino Acid
chemical_list: D011994:Recombinant Proteins; C111944:coenzyme F420-dependent glucose-6-phosphate dehydrogenase; D005954:Glucosephosphate Dehydrogenase; D000587:Oxidoreductases Acting on CH-NH Group Donors; C047126:methylenetetrahydromethanopterin dehydrogenase