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  • 1
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 10 (1994), S. 371-376 
    ISSN: 0749-503X
    Keywords: Saccharomyces cerevisiae ; NES24 ; chromosome XIII ; neomycin ; Life and Medical Sciences ; Genetics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: We have cloned NES24 using a temperature-sensitive nes24-1 mutant as a host and sequenced a 3162 bp XhoI-EcoRI DNA fragment containing the NES24 gene. Computer analysis revealed that this segment contains a 1806 bp open reading frame which is needed for complementation of the nes24-1 mutation. We found SUP8 in the region upstream of the NES24 gene, placing the NES24 gene on chromosome XIII. A protein homology search indicated that NES24 encodes a new protein. The disruption of the NES24 gene resulted in temperature-sensitive growth. The sequence has been deposited in DDBJ/EmBL/GenBank data bases under Accession Number D15052.
    Additional Material: 2 Ill.
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  • 2
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 10 (1994), S. 451-461 
    ISSN: 0749-503X
    Keywords: RAS-cAMP pathway ; CDC25 family ; cell division cycle mutation ; S. cerevisiae ; Life and Medical Sciences ; Genetics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: We have identified MS12 as a gene of Saccharomyces cerevisiae which, when on a multicopy vector, suppresses the heat shock sensitivity caused by the loss of the IRA1 product, a negative regulator of the RAS protein. The multicopy MSI2 also suppresses the heat shock sensitivity of cells with the RAS2val19 mutation but not those with the bcy1 mutation, suggesting that the MSI2 protein may interfere with the activity of the RAS protein. The sequence analysis of MSI2 reveals that it is identical to LTE1 belonging to the CDC25 family: CDC25, SCD25 and BUD5, each of which encodes a guanine nucleotide exchange factor for the ras superfamily gene products. Deletion of the entire MSI2 coding region reveals that MSI2 is not essential but the disruptant shows a cold-sensitive phenotype. Under the non-permissive conditions, more than 70% of the msi2 disruptants arrested at telophase as large budded cells with two nuclei divided completely and elongated spindles, indicating that the msi2 deletion is a cell division cycle mutation. These results suggest that MSI2 is involved in the termination of M phase and that this process is regulated by a ras superfamily gene product.
    Additional Material: 7 Ill.
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  • 3
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 1 (1985), S. 159-171 
    ISSN: 0749-503X
    Keywords: PET18 ; temperature sensitive growth ; killer ; Life and Medical Sciences ; Genetics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: The basis of pleiotropy shown by the pet18 mutants of Saccharomyces cerevisiae (rho-0, KIL-0 and temperature sensitive growth) was examined by cloning the fragment which complements the defect in growth at 37°C of the pet18 mutants. the cloned DNA could complement the defect in the maintenance of the killer plasmid but did not give the cell the ability to maintain mitochondrial DNA. Sequence analysis of the cloned DNA revealed the presence of four open reading frames, at least two of which are necessary for the complementation activity. By using the cloned DNA as a probe, we found that two independent pet18 mutants have a deletion covering the entire sequence contained in the probe. From these results we predict that the traits of the pet18 mutants that concern temperature sensitivity and killer of the pet18 mutants are controlled by a separate gene(s) from that which participates in the maintenance of mitochondrial DNA.
    Additional Material: 7 Ill.
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  • 4
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 2 (1986), S. 129-139 
    ISSN: 0749-503X
    Keywords: Saccharomyces cerevisiae ; regulation ; pho ; pho80 ; CEN15 ; nucleotide sequence ; Life and Medical Sciences ; Genetics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: The PHO80 gene, which is one of the regulatory genes exerting negative control in the pho system of Saccharomyces cerevisiae, was cloned. The 1·8 kb DNA fragment carrying the PHO80 gene was sequenced and one open reading frame large enough to encode 293 amino acids was found in the sequence. Northern blot analysis of poly(A)+-RNA isolated from cells grown under repressed and derepressed conditions revealed that (i) the size of the PHO80 message was around 1·4 kb, (ii) the expression of the PHO80 gene was not affected by the presence or absence or absence of inorganic phosphate in the medium, and (iii) the expression of the PHO80 gene was not affected by pho2, pho4, pho81, or by pho80 itself. a centromere sequence was found downstream of the PHO80 coding region.
    Additional Material: 8 Ill.
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  • 5
    ISSN: 0749-503X
    Keywords: Phosphoinositide-specific phospholipase C ; PLC-δ ; Schizosaccharomyces pombe ; Life and Medical Sciences ; Genetics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: Exploiting the polymerase chain reaction, we have isolated a gene that encodes a putative phosphoinositide-specific phospholipase C (PLC) of the fission yeast Schizosaccharomyces pombe. Inspection of the nucleotide sequence of the gene revealed an open reading frame that can encode a polypeptide of 899 amino acid residues with a calculated molecular mass of 102 kDa. This putative polypeptide contains both the X and Y regions that are conserved among three classes of mammalian PLC, and also contains a presumptive Ca2+-binding site (an E-F hand motif). The structure of the putative protein is most similar to that of the δ class of PLC isozymes. To investigate the role of this gene, designated plc1+, gene disruption was carried out by interrupting the coding region with the ura4+ marker. Growth of plc1 cells was temperature-sensitive in rich medium, and cells could not grow in synthetic medium. Expression of the PLC1 gene of Saccharomyces cerevisiae suppressed the growth defect phenotype of plc1- cells, a strong suggestion that the plc1+ gene encodes PLC. The PLC1 sequence appears in the public data libraries, DDBJ GenBank, EMBL under the following Accession Number: D38309.
    Additional Material: 5 Ill.
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  • 6
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 4 (1988), S. 179-190 
    ISSN: 0749-503X
    Keywords: Zygosaccharomyces ; yeast plasmids ; sequence homology ; plasmid evolution ; Life and Medical Sciences ; Genetics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: Genomic DNAs isolated from 420 yeast strains stocked in the Department of Fermentation Technology, Hiroshima university (HUT) were screened fro the presence of a plasmid sequence both as plasmid or in the chromosome. Five DNA samples gave rise to a positive hybridization signal wht 32P-labelled Zygosaccharomyces plasmid pSR1 was used as a probe. Two among these contain hybridzing sequences as plasmids while the other three apparently were chromosomal. Two chromosomal DNA segments of HUT 7195 (Zygosaccharomyces spp.) which hybridized with pSR1 probe were cloned and sequenced. Both DNAs hybridized with a plasmid sequence covering the P gene of pSR1. One of hte tow segments contains a large open reading frame which can encode 410 amino acid residues. The deduced amino acid sequence is closely related with that of the P gene of pSR1. The present finding suggests that there was an interchange(s) of a gene between yeast plasmid(s) and chromosomes.
    Additional Material: 8 Ill.
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  • 7
    ISSN: 0749-503X
    Keywords: Gene family ; protein with internal repeats ; S. cerevisiae ; heat shock ; Life and Medical Sciences ; Genetics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: We isolated three highly homologous genes, PIR1, PIR2 and PIR3, collectively called the PIR genes. The remarkable feature of their putative amino acid sequence is that they contain a sequence consisting of 18-19 amino acid residues repeated tandemly seven to ten times. Genes homologous to PIR were found in Kluyveromyces lactis and Zygosaccharomyces rouxii but not in Schizosaccharomyces pombe, suggesting that a set of PIR genes plays some role in budding yeast. Bias of codon usage seen in each of the PIR translation products suggests that they are expressed abundantly. The fact that disruption of each gene is viable indicates that none of them is essential. The double disruptants, pir1 pir2, were viable under various conditions, such as higher temperature (37°C) or high salt concentration, but showed a slow-growing phenotype on an agar slab. Furthermore, they were sensitive to heat shock. Addition of a pir3 disruption to the pir1 pir2 double disruptant brought about no phenotypic difference from the original double mutant. PIR1 and PIR3 are closely linked to each other and are on chromosome XI.
    Additional Material: 10 Ill.
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