title: Sequencing of the gene ant which affects the Na+/H+ antiporter activity in Escherichia coli.
abstract: By introduction of deletions and/or insertions, we have defined a small DNA fragment (1.58 kilobase pairs) which contains the ant gene. Thus, transformants of all plasmid constructs containing this segment exhibit Antup phenotype, i.e. growth is Li+-resistant and Na+/H+ antiporter activity is increased in isolated everted membrane vesicles. Utilizing the T7 promoter expression system, we also found that this fragment encodes for a single protein of 35 kDa. The DNA fragment has been sequenced and found to contain an open reading frame of 1085 base pairs. Analysis of the sequence of the predicted protein suggests the presence of 10 putative transmembrane segments in the protein.
authors.affiliation: Department of Molecular and Microbial Ecology, Hadassah Medical School, Hebrew University, Jerusalem, Israel.
authors.forename: R
authors.initials: R
authors.lastname: Karpel
authors.forename: Y
authors.initials: Y
authors.lastname: Olami
authors.forename: D
authors.initials: D
authors.lastname: Taglicht
authors.forename: S
authors.initials: S
authors.lastname: Schuldiner
authors.forename: E
authors.initials: E
authors.lastname: Padan
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D002352:Carrier Proteins / Q000235:genetics* / Q000378:metabolism; D003001:Cloning, Molecular; D004262:DNA Restriction Enzymes; D004926:Escherichia coli / Q000235:genetics* / Q000378:metabolism; D005796:Genes; D005798:Genes, Bacterial; D008958:Models, Molecular; D008969:Molecular Sequence Data; D009690:Nucleic Acid Conformation; D011401:Promoter Regions, Genetic; D011487:Protein Conformation; D012333:RNA, Messenger / Q000235:genetics; D017923:Sodium-Hydrogen Exchangers
chemical_list: D002352:Carrier Proteins; D012333:RNA, Messenger; D017923:Sodium-Hydrogen Exchangers; D004262:DNA Restriction Enzymes