title: Sucl+ encodes a predicted 13-kilodalton protein that is essential for cell viability and is directly involved in the division cycle of Schizosaccharomyces pombe.
abstract: Sucl+ was originally identified as a DNA sequence that, at high copy number, rescued Schizosaccharomyces pombe strains carrying certain temperature-sensitive alleles of the cdc2 cell cycle control gene. We determined the nucleotide sequence of a 1,083-base-pair Sucl+ DNA fragment and S1 mapped its 866-nucleotide RNA transcript. The protein-coding sequence of the gene is interrupted by two intervening sequences of 115 and 51 base pairs. The predicted translational product of the gene is a protein of 13 kilodaltons. A chromosomal gene disruption of Sucl+ was constructed in a diploid S. pombe strain. Germinating spores carrying a null allele of the gene were capable of very limited cell division, following which many cells became highly elongated. The Sucl+ gene was also strongly overexpressed under the control of a heterologous S. pombe promoter. Overexpression of Sucl+ is not lethal but causes a division delay such that cells are approximately twice the normal length at division. These data suggest that Sucl+ encodes a protein which plays a direct role in the cell division cycle of S. pombe.
mesh_terms: D000483:Alleles; D000595:Amino Acid Sequence; D001483:Base Sequence; D002453:Cell Cycle; D018797:Cell Cycle Proteins; D004262:DNA Restriction Enzymes; D005656:Fungal Proteins / Q000235:genetics*; D005796:Genes; D005800:Genes, Fungal; D008970:Molecular Weight; D009693:Nucleic Acid Hybridization; D004718:Saccharomycetales / Q000235:genetics*; D012568:Schizosaccharomyces / Q000166:cytology / Q000235:genetics* / Q000254:growth & development; D029702:Schizosaccharomyces pombe Proteins
chemical_list: D018797:Cell Cycle Proteins; D005656:Fungal Proteins; D029702:Schizosaccharomyces pombe Proteins; C051655:Suc1 protein, S pombe; D004262:DNA Restriction Enzymes