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  • 1
    Digitale Medien
    Digitale Medien
    Springer
    Molecular genetics and genomics 253 (1996), S. 303-314 
    ISSN: 1617-4623
    Schlagwort(e): Key words Glucose repression ; Induction ; Cellulase ; MIG1 ; creA/cre1
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract  Functional analysis of the cellulase promoter cbh1 of the filamentous fungus Trichoderma reesei was carried out using the Escherichia coli lacZ gene as a reporter. An assay based on cultivation on solid medium in microtiter plates was developed that allows rapid and reliable semiquantitative analysis of β-galactosidase expression of a large number of transformants. A series of deletions and specifically designed alterations were made covering 2.2 kb of the cbh1 promoter. Removal of sequences upstream of nucleotide −500 in relation to the initiator ATG abolished glucose repression. Mutation of a single hexanucleotide sequence 5′GTGGGG at nucleotide −720 was sufficient for derepression. This site is similar to the binding sites of the glucose repressors MIG1 of Saccharomyces cerevisiae and CREA/CREI of filamentous fungi. Removal of the glucose repressor site did not affect sophorose induction. Sophorose induction of the promoter was retained even in deletion derivatives lacking sequences upstream of position −161, which retained about 70 bp upstream of the transcription start point and only 30 bp upstream of the TATA box.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 7 (1991), S. 643-650 
    ISSN: 0749-503X
    Schlagwort(e): yeast ; Saccharomyces cerevisiae ; protein secretion ; SEC1 ; nucleotide sequence ; amino acid sequence ; Life and Medical Sciences ; Genetics
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Biologie
    Notizen: The SEC1 gene of yeast Saccharomyces cerevisiae was cloned by complementing the temperature-sensitive mutantion of sec1-1 at 37°C, and its nucleotide sequence was determined. SEC1 is a single copy gene and encodes a protein of 724 amino acids and 83,490 daltons with a predicted pI value of 6·11. Hydrophobicity plotting showed no clearly hydrophobic regions suggesting a soluble nature for the protein. Amino acid sequence comparisons revealed no obvious homologies with the proteins in the SWISSPROT databank. Two consensus sequences for the cdc2 encoded protein kinase recognition site were revealed within Sec1p. The codon usage suggests a low expression level for SEC1. The 5′ non-translated region contains two TATA-like sequences at -52 and -215 nucleotides from the translation start site. Two potential regulatory sequences for DNA binding proteins were found in the non-coding 5′ region: a HAP2/HAP3 consensus recognition sequence at nucleotide -154 and a BAF1 consensus recognition sequence at nucleotide -136. The SEC1 specific probe detected a 2400 nucleotides long transcript, which was in reasonable agreement with the 2172 nucleotides long open reading frame.
    Zusätzliches Material: 5 Ill.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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