The purB gene of Escherichia coli K-12 is located in an operon
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چکیده
منابع مشابه
The D-allose operon of Escherichia coli K-12.
Escherichia coli K-12 can utilize D-allose, an all-cis hexose, as a sole carbon source. The operon responsible for D-allose metabolism was localized at 92.8 min of the E. coli linkage map. It consists of six genes, alsRBACEK, which are inducible by D-allose and are under the control of the repressor gene alsR. This operon is also subject to catabolite repression. Three genes, alsB, alsA, and al...
متن کاملDuplication of a gene belonging to an arginine operon of Escherichia coli K-12.
MONG the structural determinants of the enzymes involved in arginine bioA synthesis in Eschi ch ia codi, four are clustered in the order argE, argC, argB, argH, and probably adjacent (GLANSDORFF 1965, Figure I ) ; the synthesis of enzyme E is however not strictly coordinated with the synthesis of enzymes C, B and H (BAUMBERG, BACON and VOGEL 1965; GLANSDORFF and SAND 1965). The expression of th...
متن کاملMultiple regulator gene control of the galactose operon in Escherichia coli K-12.
Previous studies showed that nonsense mutations in either of two genes (capR or capS) or an undefined mutation in a third gene (capT) led to pleiotropic effects: (i) increased capsular polysaccharide synthesis (mucoid phenotype); (ii) increased synthesis of enzymes specified by at least four spatially separated operons involved in synthesis of capsular polysaccharide including the product of th...
متن کاملSeparate regulation of purA and purB loci of Escherichia coli K-12.
We isolated a strain of Escherichia coli K-12 in which the lac structural genes are fused to the purB control region and used this strain to study the regulation of the purA and purB loci. The purA locus was derepressed in response to either limiting adenine or guanine growth conditions in the presence of excess guanine or adenine, respectively. The presence of hypoxanthine in the culture mediu...
متن کاملInsertion mutagenesis of the metJBLF gene cluster of Escherichia coli K-12: evidence for an metBL operon.
The effects of Mu or transposon 5 insertions on the expression of genes of the metJBLF cluster show that metB and metL form an operon, transcribed from metB to metL, and that metF and metJ are independently transcribed.
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ژورنال
عنوان ژورنال: Microbiology
سال: 1996
ISSN: 1350-0872,1465-2080
DOI: 10.1099/13500872-142-11-3219