title: Expression of Sulfolobus solfataricus trpE and trpG genes in E. coli.
abstract: The genes trpE and trpG of the hyperthermophilic archaeon Sulfolobus solfataricus, encoding the components I and II of anthranilate synthase, were cloned and co-expressed in Escherichia coli. The properties of the recombinant protein were determined and compared to those of the wild type complex. Gel filtration chromatography revealed an alpha2beta2 composition. The heteromeric enzyme is fully active above 85 degrees C and can be considered to be an "extremozyme" according to Adams et al.[1]. Sulfolobus solfataricus anthranilate synthase is subject to feedback inhibition by L-tryptophan even if it lacks the co-operativity that has been observed for all the other tetrameric anthranilate synthases.
authors.affiliation: Dipartimento di Chimica Organica e Biologica, Università di Napoli Federico II, Italy.
authors.forename: M L
authors.initials: ML
authors.lastname: Tutino
authors.forename: A
authors.initials: A
authors.lastname: Tosco
authors.forename: G
authors.initials: G
authors.lastname: Marino
authors.forename: G
authors.initials: G
authors.lastname: Sannia
mesh_terms: D000595:Amino Acid Sequence; D000878:Anthranilate Synthase / Q000096:biosynthesis* / Q000235:genetics / Q000378:metabolism; D001483:Base Sequence; D003001:Cloning, Molecular; D017931:DNA Primers; D004926:Escherichia coli; D005798:Genes, Bacterial; D007700:Kinetics; D008969:Molecular Sequence Data; D016133:Polymerase Chain Reaction; D011994:Recombinant Proteins / Q000096:biosynthesis / Q000378:metabolism; D017386:Sequence Homology, Amino Acid; D016944:Sulfolobus / Q000201:enzymology* / Q000235:genetics
chemical_list: D017931:DNA Primers; D011994:Recombinant Proteins; D000878:Anthranilate Synthase