title: Identification, cloning, and expression of the gene for adenylate kinase from the thermoacidophilic archaebacterium Sulfolobus acidocaldarius.
abstract: An adenylate kinase gene from a member of the archaebacterial kingdom, the thermoacidophilic archaebacterium (archaeon) Sulfolobus acidocaldarius, has been cloned and sequenced for the first time. Two degenerate oligonucleotide probes, based on the N-terminal amino acid sequence information, led to the amplification of a gene-specific DNA fragment, used to screen subgenomic libraries. Comparing the DNA-derived amino acid sequence of total 194 residues with those of known procaryotic and eucaryotic adenylate kinases revealed only a low degree of similarity, except for a glycine-rich region close to the N-terminus, the so-called P-loop. Using inducible expression systems catalytically active S. acidocaldarius adenylate kinase was produced in large amounts. Although the total length of the protein and the results of alignment procedures suggest a closer relation to eucaryotic than to procaryotic sequences, the archaebacterial enzyme may represent a novel class of adenylate kinases. This is corroborated by the finding that an antiserum against this protein does not cross-react with Escherichia coli nor yeast or rabbit adenylate kinases for example.
authors.affiliation: Institute for Biochemistry, Medical University of Lübeck, FRG.
authors.forename: T
authors.initials: T
authors.lastname: Kath
authors.forename: R
authors.initials: R
authors.lastname: Schmid
authors.forename: G
authors.initials: G
authors.lastname: Schäfer
mesh_terms: D000263:Adenylate Kinase / Q000096:biosynthesis / Q000235:genetics*; D000595:Amino Acid Sequence; D001483:Base Sequence; D003001:Cloning, Molecular; D004269:DNA, Bacterial / Q000235:genetics; D004926:Escherichia coli; D005798:Genes, Bacterial; D006801:Humans; D008969:Molecular Sequence Data; D011994:Recombinant Proteins / Q000096:biosynthesis; D017422:Sequence Analysis, DNA; D017386:Sequence Homology, Amino Acid; D016945:Sulfolobus acidocaldarius / Q000201:enzymology / Q000235:genetics*
chemical_list: D004269:DNA, Bacterial; D011994:Recombinant Proteins; D000263:Adenylate Kinase