title: Identification, purification, and molecular cloning of autonomously replicating sequence-binding protein 1 from fission yeast Schizosaccharomyces pombe.
abstract: Autonomously replicating sequence (ARS) elements of the fission yeast Schizosaccharomyces pombe contain multiple imperfect copies of the consensus sequence reported by Maundrell et al. [Maundrell K., Hutchison, A. & Shall, S. (1988) EMBO J. 7, 2203-2209]. When cell free extracts of S. pombe were incubated with a dimer or tetramer of an oligonucleotide containing the ARS consensus sequence, several complexes were detected using a gel mobility-shift assay. The proteins forming these complexes also bind ars3002, which is the most active origin in the ura4 region of chromosome III of S. pombe. One protein, partly responsible for the binding activity observed with crude extracts, was purified to near homogeneity. It is a 60-kDa protein and was named ARS-binding protein 1 (Abp1). Abp1 preferentially binds to multiple sites in ARS 3002 and to the DNA polymer poly[d(A.T)]. The cloning and sequence of the gene coding for Abp1 revealed that it encodes a protein of 59.8 kDa (522 amino acids). Abp1 has significant homology (25% identity, 50% similarity) to the N-terminal region (approximately 300 amino acids) of the human and mouse centromere DNA-binding protein CENP-B. Because centromeres of S. pombe contain a high density of ARS elements, Abp1 may play a role connecting DNA replication and chromosome segregation.
authors.affiliation: Department of Viral Oncology, Institute for Virus Research, Kyoto University, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Murakami
authors.forename: J A
authors.initials: JA
authors.lastname: Huberman
authors.forename: J
authors.initials: J
authors.lastname: Hurwitz
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001324:Autoantigens; D001483:Base Sequence; D051936:Centromere Protein B; D002868:Chromosomal Proteins, Non-Histone / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism; D003001:Cloning, Molecular; D004261:DNA Replication; D004271:DNA, Fungal / Q000378:metabolism; D004268:DNA-Binding Proteins / Q000235:genetics* / Q000378:metabolism; D005656:Fungal Proteins / Q000235:genetics / Q000378:metabolism; D005800:Genes, Fungal; D006801:Humans; D051379:Mice; D008969:Molecular Sequence Data; D029701:Saccharomyces cerevisiae Proteins; D012568:Schizosaccharomyces / Q000235:genetics*; D029702:Schizosaccharomyces pombe Proteins; D016415:Sequence Alignment; D017386:Sequence Homology, Amino Acid; D014157:Transcription Factors
chemical_list: C061886:ABF1 protein, S cerevisiae; D001324:Autoantigens; C497926:CENPB protein, human; C497927:Cenpb protein, mouse; D051936:Centromere Protein B; D002868:Chromosomal Proteins, Non-Histone; D004271:DNA, Fungal; D004268:DNA-Binding Proteins; D005656:Fungal Proteins; D029701:Saccharomyces cerevisiae Proteins; D029702:Schizosaccharomyces pombe Proteins; D014157:Transcription Factors; C097691:cbp1 protein, S pombe