title: Analysis of the cya locus of Escherichia coli.
abstract: A 9500-bp DNA segment containing the adenylate cyclase gene (cya) of Escherichia coli has been isolated and analyzed. Four large proteins are encoded within this fragment - the adenylate cyclase protein (92 kDal), two proteins of unknown function (37 and 32 kDal), and a part of the uvrD-coded protein. Various truncated adenylate cyclase proteins, made from cya genes having as much as 60% of their carboxy-terminal end deleted, are sufficient to complement cya- hosts. When these truncated cya genes are present on a multicopy plasmid in a cya- host, the synthesis of beta-galactosidase is still regulated by glucose. The "maxicell" technique was used to visualize the four proteins encoded by this region and some of the truncated adenylate cyclase proteins.
mesh_terms: D000262:Adenylyl Cyclases / Q000235:genetics*; D002874:Chromosome Mapping; D004262:DNA Restriction Enzymes; D004269:DNA, Bacterial / Q000235:genetics / Q000302:isolation & purification; D004274:DNA, Recombinant; D004926:Escherichia coli / Q000201:enzymology / Q000235:genetics*; D005696:Galactosidases / Q000096:biosynthesis*; D005786:Gene Expression Regulation; D005798:Genes, Bacterial; D005816:Genetic Complementation Test; D005947:Glucose / Q000378:metabolism; D010957:Plasmids; D001616:beta-Galactosidase / Q000096:biosynthesis*
chemical_list: D004269:DNA, Bacterial; D004274:DNA, Recombinant; D004262:DNA Restriction Enzymes; D005696:Galactosidases; D001616:beta-Galactosidase; D000262:Adenylyl Cyclases; D005947:Glucose