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  • Artikel  (4)
  • 21S rRNA  (1)
  • A-10  (1)
  • Cytochrome c 1 heme lyase  (1)
  • Intervening sequence mutations  (1)
  • D24
  • Deutschland
  • Springer  (4)
  • Cambridge University Press
  • ZBW - Deutsche Zentralbibliothek für Wirtschaftswissenschaften, Leibniz-Informationszentrum Wirtschaft Kiel, Hamburg
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  • Artikel  (4)
Verlag/Herausgeber
  • Springer  (4)
  • Cambridge University Press
  • ZBW - Deutsche Zentralbibliothek für Wirtschaftswissenschaften, Leibniz-Informationszentrum Wirtschaft Kiel, Hamburg
Erscheinungszeitraum
  • 1
    Digitale Medien
    Digitale Medien
    Springer
    Current genetics 1 (1980), S. 155-161 
    ISSN: 1432-0983
    Schlagwort(e): Intervening sequence mutations ; RNA blotting ; Transcript hybridization ; RNA processing
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary Electrophoretic separation of mitochondrial RNA followed by hybridization with restriction fragments of mtDNA has been used to identify transcripts of the split gen COB which codes for apocytochrome b. In wild type a major transcript of 18S is detected besides a 10S RNA and a series of transcripts with electrophoretic mobilities higher than 18S. Mutations in coding sequences do not significantly alter this transcript pattern. In contrast, mutations in intervening sequences give rise to different patterns: The 18S RNA, the putative messenger for apocytochrome b, is lacking; depending on the intervening sequence affected by mutation, one or the other of the larger transcripts (23S, 24S, 32S, 34S) is accumulated instead. In most mutants a 10S RNA species is present; it has not been detected, however, in case of a small cluster of mutations which lead to the accumulation of the largest transcript (34S) observed, which most likely contains all coding and intervening sequences of the split gene COB. These results suggest a pathway of splicing.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    Current genetics 25 (1994), S. 291-298 
    ISSN: 1432-0983
    Schlagwort(e): Cytochrome c 1 ; Cytochrome c 1 heme lyase ; GRF2p ; Glucose repression ; HAPp ; Saccharomyces cerevisiae
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract In this paper we examine the expression of the Saccharomyces cerevisiae CYT2 gene, which encodes cytochrome c 1 heme lyase. This enzyme is required for covalent attachment of heme to apocytochrome c 1, a subunit of the mitochondrial respiratory chain. Transcription of the 1-kb CYT2 mRNA initiates at four prominent sites at a distance of 52–225 bp in front of the AUG start codon. The level of CYT2 mRNA is not influenced by the presence or absence of oxygen or of heme, but it is subject to carbonsource control. The concentration of the CYT2 mRNA is significantly reduced in glucose-grown cells as compared to cells grown under non-repressing conditions. Neither the HAPp activator proteins nor MIG1p, a repressor protein involved in glucose repression, seem to mediate this effect.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    ISSN: 1617-4623
    Schlagwort(e): Chloramphenicol resistance ; frameshifting Mitochondria ; 21S rRNA ; Yeast
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract A mutation shown to cause resistance to chloramphenicol inSaccharomyces cerevisiae was mapped to the central loop in domain V of the yeast mitochondrial 21S rRNA. The mutant 21S rRNA has a base pair exchange from U2677 (corresponding to U2504 inEscherichia coli) to C2677, which significantly reduces rightward frameshifting at a UU UUU UCC A site in a + 1 U mutant. There is evidence to suggest that this reduction also applies to leftward frameshifting at the same site in a − 1 U mutant. The mutation did not increase the rate of misreading of a number of mitochondrial missense, nonsense or frameshift (of both signs) mutations, and did not adversely affect the synthesis of wild-type mitochondrial gene products. It is suggested here that ribosomes bearing either the C2677 mutation or its wild-type allele may behave identically during normal decoding and only differ at sites where a ribosomal stall, by permitting non-standard decoding, differentially affects the normal interaction of tRNAs with the chloramphenicol resistant domain V. Chloramphenicol-resistant mutations mapping at two other sites in domain V are described. These mutations had no effect on frameshifting.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    ISSN: 1573-0646
    Schlagwort(e): growth inhibitor ; A-10 ; carcinoma ; mammary ; antineoplastic chemotherapy
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Medizin
    Notizen: Abstract A factor of nominal molecular weight 6K–10K Daltons, isolated from bovine aorta, has previously been shown to inhibit neovascularization and tumor growth in vivo and the growth of some tumor cells as well as endothelial cells in culture. This factor, termed A-10, was tested alone and in combination with Adriamycin against TA3Ha mammary adenocarcinoma cells in tissue culture. It was found to have cytotoxicity additive to that of Adriamycin in inhibiting the growth of these cells. In vitro and animal studies show that the sequence of Adriamycin → A-10 is superior to either agent alone in delaying the appearance of palpable tumors after subcutaneous injection of 105 pre-treated tumor cells in the tail of strain A mice. While the growth rate of the primary tumor was not affected by such treatment, survival was prolonged to a greater degree by the this sequence than by either of these agents used alone. A-10 treatment reduced the number of metastases to the adrenal gland but not to lung, liver, or lymph nodes. It did, however, reduce the size of metastases to para-aortic lymph nodes.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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