title: NBP35 encodes an essential and evolutionary conserved protein in Saccharomyces cerevisiae with homology to a superfamily of bacterial ATPases.
abstract: We have cloned a novel and essential gene, NBP35, from Saccharomyces cerevisiae that encodes a putative Nucleotide Binding Protein of 35 kDa. Sequence analysis revealed structural homology of Nbp35p with a family of bacterial ATPases involved in cell division processes and chromosome partitioning. A search in databases identified closely related sequences from yeast and higher eukaryotes, suggesting a conserved function for this family of proteins. By indirect immunofluorescence, a tagged version of Nbp35p carrying two immunoglobulin G-binding domains derived from Staphylococcus aureus Protein A was localised to the nucleus. A single amino-acid substitution in the conserved nucleotide-binding motif of Nbp35p renders the protein non-functional. Furthermore, a conserved cluster of four cysteines in the N-terminal end of the protein is also required for an essential role of Nbp35p.
authors.affiliation: European Molecular Biology Laboratory, Heidelberg, Germany.
authors.forename: G
authors.initials: G
authors.lastname: Vitale
authors.forename: E
authors.initials: E
authors.lastname: Fabre
authors.forename: E C
authors.initials: EC
authors.lastname: Hurt
mesh_terms: D000251:Adenosine Triphosphatases / Q000737:chemistry*; D000595:Amino Acid Sequence; D001483:Base Sequence; D005075:Biological Evolution; D002467:Cell Nucleus / Q000378:metabolism; D003001:Cloning, Molecular; D017124:Conserved Sequence; D004271:DNA, Fungal; D005656:Fungal Proteins / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism; D019204:GTP-Binding Proteins / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism; D005800:Genes, Fungal; D006801:Humans; D008969:Molecular Sequence Data; D016297:Mutagenesis, Site-Directed; D009711:Nucleotides / Q000378:metabolism; D012441:Saccharomyces cerevisiae / Q000201:enzymology / Q000235:genetics*; D029701:Saccharomyces cerevisiae Proteins; D017386:Sequence Homology, Amino Acid
chemical_list: D004271:DNA, Fungal; D005656:Fungal Proteins; C102265:NBP35 protein, S cerevisiae; D009711:Nucleotides; D029701:Saccharomyces cerevisiae Proteins; D000251:Adenosine Triphosphatases; D019204:GTP-Binding Proteins