title: Yeast cell cycle protein CDC48p shows full-length homology to the mammalian protein VCP and is a member of a protein family involved in secretion, peroxisome formation, and gene expression.
abstract: Yeast mutants of cell cycle gene cdc48-1 arrest as large budded cells with microtubules spreading aberrantly throughout the cytoplasm from a single spindle plaque. The gene was cloned and disruption proved it to be essential. The CDC48 sequence encodes a protein of 92 kD that has an internal duplication of 200 amino acids and includes a nucleotide binding consensus sequence. Vertebrate VCP has a 70% identity over the entire length of the protein. Yeast Sec18p and mammalian N-ethylmaleimide-sensitive fusion protein, which are involved in intracellular transport, yeast Pas1p, which is essential for peroxisome assembly, and mammalian TBP-1, which influences HIV gene expression, are 40% identical in the duplicated region. Antibodies against CDC48 recognize a yeast protein of apparently 115 kD and a mammalian protein of 100 kD. Both proteins are bound loosely to components of the microsomal fraction as described for Sec18p and N-ethylmaleimide-sensitive fusion protein. This similarity suggests that CDC48p participates in a cell cycle function related to that of N-ethylmaleimide-sensitive fusion protein/Sec18p in Golgi transport.
authors.affiliation: Physiologisch-chemisches Institut der Universität Tübingen, Federal Republic of Germany.
authors.forename: K U
authors.initials: KU
authors.lastname: Fröhlich
authors.forename: H W
authors.initials: HW
authors.lastname: Fries
authors.forename: M
authors.initials: M
authors.lastname: Rüdiger
authors.forename: R
authors.initials: R
authors.lastname: Erdmann
authors.forename: D
authors.initials: D
authors.lastname: Botstein
authors.forename: D
authors.initials: D
authors.lastname: Mecke
mesh_terms: D000251:Adenosine Triphosphatases; D000595:Amino Acid Sequence; D001483:Base Sequence; D015153:Blotting, Western; D002453:Cell Cycle; D018797:Cell Cycle Proteins / Q000235:genetics*; D003001:Cloning, Molecular; D004271:DNA, Fungal; D005656:Fungal Proteins / Q000235:genetics* / Q000276:immunology / Q000378:metabolism; D015870:Gene Expression; D006651:Histocytochemistry; D008830:Microbodies / Q000378:metabolism*; D008969:Molecular Sequence Data; D005810:Multigene Family; D009154:Mutation; D015183:Restriction Mapping; D012441:Saccharomyces cerevisiae / Q000235:genetics*; D029701:Saccharomyces cerevisiae Proteins; D016415:Sequence Alignment; D000074405:Valosin Containing Protein
chemical_list: D018797:Cell Cycle Proteins; D004271:DNA, Fungal; D005656:Fungal Proteins; D029701:Saccharomyces cerevisiae Proteins; D000251:Adenosine Triphosphatases; C000614177:CDC48 protein, S cerevisiae; D000074405:Valosin Containing Protein