title: The mating-type region of Schizosaccharomyces pombe contains an essential gene encoding a protein homologous to human modulators of HIV transactivation.
abstract: In Schizosaccharomyces pombe, an intrachromosomal crossover between the mating type (MT) expression locus and one of the silent donor cassettes is lethal due to the loss of the intervening L region. The region contains one essential gene, let1. This gene was cloned and sequenced. The deduced amino acid (aa) sequence of let1 shows extensive homologies with SUG1 from Saccharomyces cerevisiae. Significant homologies were also found with the human HIV transactivation modulators, MSS1 and TBP-1, as well as with subunit 4 of the mammalian 26 S protease. The data indicate that let1 is a member of a recently defined multigene family of ATPases.
authors.affiliation: Institut für Genetik, Technische Universität Braunschweig, Germany.
authors.forename: H
authors.initials: H
authors.lastname: Michael
authors.forename: H
authors.initials: H
authors.lastname: Schmidt
authors.forename: O
authors.initials: O
authors.lastname: Fleck
authors.forename: H
authors.initials: H
authors.lastname: Gutz
authors.forename: C
authors.initials: C
authors.lastname: Liedtke
authors.forename: A
authors.initials: A
authors.lastname: Lorentz
authors.forename: K
authors.initials: K
authors.lastname: Ostermann
mesh_terms: D000251:Adenosine Triphosphatases / Q000145:classification / Q000235:genetics*; D000595:Amino Acid Sequence; D001483:Base Sequence; D003001:Cloning, Molecular; D005656:Fungal Proteins / Q000235:genetics*; D005800:Genes, Fungal / Q000235:genetics*; D005804:Genes, Lethal / Q000235:genetics*; D049770:Genes, Mating Type, Fungal; D006678:HIV / Q000235:genetics; D006801:Humans; D000072235:Mating Factor; D008969:Molecular Sequence Data; D010455:Peptides / Q000235:genetics; D046988:Proteasome Endopeptidase Complex; D012097:Repressor Proteins; D029701:Saccharomyces cerevisiae Proteins; D012568:Schizosaccharomyces / Q000235:genetics*; D029702:Schizosaccharomyces pombe Proteins; D017422:Sequence Analysis, DNA; D017386:Sequence Homology, Amino Acid; D015533:Transcriptional Activation
chemical_list: D005656:Fungal Proteins; D010455:Peptides; D012097:Repressor Proteins; D029701:Saccharomyces cerevisiae Proteins; D029702:Schizosaccharomyces pombe Proteins; D000072235:Mating Factor; D046988:Proteasome Endopeptidase Complex; D000251:Adenosine Triphosphatases; C088828:let1 protein, S pombe; C069670:RPT6 protein, S cerevisiae