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  • 1
    Electronic Resource
    Electronic Resource
    A general suppressor of RNA polymerase I, II and III mutations in Saccharomyces cerevisiae (1993)
    Springer
    Molecular genetics and genomics 239 (1993), S. 169-176 
    Details
    ISSN: 1617-4623
    Keywords: Protein phosphorylation ; Phosphatase ; Cyclic AMP ; RNA polymerase ; Transcription
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A multicopy genomic library of Saccharomyces cerevisiae (strain FL100) was screened for its ability to suppress conditionally defective mutations altering the 31 kDa subunit (rpc31–236) or the 53 kDa subunit (rpc53-254/424) of RNA polymerase III. In addition to allele-specific suppressors, we identified seven suppressor clones that acted on both mutations and also suppressed several other conditional mutations defective in RNA polymerases I or II. All these clones harbored a complete copy of the SSD1 gene. The same pleiotropic suppression pattern was found with the dominant SSD1-v allele present in some laboratory strains of S. cerevisiae. SSD1-v was previously shown to suppress mutations defective in the SIT4 gene product (a predicted protein phosphatase subunit) or in the regulatory subunit of the cyclic AMP-dependent protein kinase. We propose that the SSD1 gene product modulates the activity (or the level) of the three nuclear RNA polymerases, possibly by altering their degree of phosphorylation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00281615
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  • 2
    Electronic Resource
    Electronic Resource
    Two distinct yeast proteins are related to the mammalian ribosomal polypeptide L7 (1993)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 9 (1993), S. 1085-1091 
    Details
    ISSN: 0749-503X
    Keywords: Saccharomyces cerevisiae ; Duplication ; Life and Medical Sciences ; Genetics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: The RLP7 gene of Saccharomyces cerevisiae was cloned, sequenced and localized to the right arm of chromosome XIV, close to the centromere. It encodes a predicted polypeptide (RLP7p) of 322 amino acids, with a calculated molecular mass of 36 kDa and an isoelectric point of 9·6. Putative open reading frames very similar to RLP7 are present in two other yeasts, Kluyveromyces lactis and Candida utilis. The RLP7p gene product has significant sequence similarity to the S. cerevisiae YL8 polypeptide of the large ribosomal subunit (Mizuta et al., 1992), itself homologous to the L7 subunit of mammalian ribosomes. However, RLP7p and YL8 do not functionally replace each other, since an rlp7-Δ::HIS3 strain is completely inviable. Judging from its predicted mass, isoelectric point and amino acid sequence, RLP7p does not correspond to any ribosomal component biochemically identified so far in S. cerevisiae, and also differs from all known ribosomal proteins by the low codon usage bias of its gene.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/yea.320091007
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    XIV. Yeast sequencing reports. Organization of the centromeric region of chromosome XIV in Saccharomyces cerevisiae (1994)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 10 (1994), S. 523-533 
    Details
    ISSN: 0749-503X
    Keywords: Mitochondrial carriers ; duplication ; citrate synthase ; RNA binding ; ribosomes ; Life and Medical Sciences ; Genetics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: A 15·1 kb fragment of the yeast genome was allocated to the centromeric region of chromosome XIV by genetic mapping. It contained six bona fide genes, RPC34, FUN34, CIT1 (Suissa et al., 1984), RLP7, PET8 and MRP7 (Fearon and Mason, 1988) and two large open reading frames, DOM34 and TOM34, RPC34 and RLP7 define strictly essential functions, whereas CIT1, PET8 and MRP7 encode mitochondrial proteins. The PET8 product belongs to a family of mitochondrial carrier proteins. FUN34 encodes a putative transmembraneous protein that is non-essential as judged from the normal growth of the fun34-::L̈K18 (URA3) allele, even on respirable substrates. TOM34 codes for a putative RNA binding protein, and DOM34 defines a hypothetical polypeptide of 35 kDa, with no significant homology to known proteins. The region under study also contains two divergently transcribed tDNAs, separated only by a chimeric transposable element. This tight tDNA linkage pattern is commonly encountered in yeast, and a general hypothesis is proposed for its emergence on the Saccharomyces cerevisiae genome. RPC34, RLP7, PET8 and MRP7 are unique on the yeast genome, but the remaining genes belong to an extant centromeric duplication between chromosome III and XIV. The sequences have been deposited in the EMBL/GenBank data libraries under Accession Numbers L11277, L19167, M11344, M22116, V02536, X00782 and X63746.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/yea.320100412
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    Paper (German National Licenses)
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