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  • 1
    ISSN: 0749-503X
    Keywords: Saccharomyces cerevisiae ; chromosome XV ; retrotransposon ; delta element ; tRNA suppressor ; transfer tRNA ; intron ; myo-inositol transporter ; transcription factor ; methyltransferase ; Life and Medical Sciences ; Genetics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: We have sequenced on both strands a 44,019 bp fragment located on the left arm of Saccharomyces cerevisiae chromosome XV.The sequenced segment contains 22 open reading frames (ORFs) of at least 100 amino acids long, one of which probably contains an intron. Six of the 22 ORFs correspond to known proteins: the multicopy suppressor of Snf1 protein 1, the two Ty1-H3 transposon proteins TyA and TyB, the myo-inositol transporter 2, the transcription factor protein Ino4 and the 3,4-dihydroxy-5-hexaprenylbenzoate methyltransferase. Of the 16 remaining ORFs, two show highest homologies with the yeast serine/threonine protein kinase Ste20 and the human tryptophanyl-tRNA synthetase. Eight ORFs show slight similarities with protein sequences described in data banks.DNA sequence comparison reveals also the presence of three known sequences: the Ty1-H3 transposable element, the yeast suf1(+) frameshift suppressor gene for tRNA-Gly and the yeast transfer RNA-Thr-1a. A fourth DNA sequence shows striking identities with the yeast delta elements.The 44,019 bp sequence has been entered in the EMBL data library under Accession Number Z48149.
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  • 2
    ISSN: 0749-503X
    Keywords: Saccharomyces cerevisiae ; chromosome X ; hexose transporter ; α-glucosidase ; left telomere ; Life and Medical Sciences ; Genetics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: We have sequenced on both strands a 40,257 bp fragment located near the left telomere of chromosome X of Saccharomyces cerevisiae.The sequenced segment contains 21 open reading frames (ORFs) at least 100 amino acids long. Five of the ORFs correspond to known amino acid sequences: two hypothetical proteins in the subtelomeric Y′ repeat region of 65·4 and 12·8 KDa, the cytochrome B pre-mRNA processing CBP1 protein, the mitochondrial nuclease NUC1 and the CRT1 protein. Of the 16 remaining ORFs, eight show highest homologies with the S. cerevisiae hexose transporters family (two ORFs), the yeast α-glucosidase (two ORFs), the yeast PEP1 precursor, the Escherichia coli galactoside O-acetyltransferase, the S. cerevisiae 137·7 KDa protein located in the Y′ region and a protein of unknown function of Schizosaccharomyces pombe. Finally, eight of the ORFs exhibit no significant similarity with any amino acid sequences described in data banks.DNA sequence comparison has revealed the presence of different repeated elements characteristic of yeast chromosome ends.Disruption studies have been performed on two ORFs encoding putative proteins of unknown function.The sequence has been entered in the EMBL Data Library under Accession Number Z34098.
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  • 3
    ISSN: 0749-503X
    Keywords: Saccharomyces cerevisiae ; chromosome XI ; protein kinase ; sequencing project ; Life and Medical Sciences ; Genetics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: We have completely sequenced on both strands a continuous DNA segment of 36·2 kb located on the left arm of Saccharomyces cerevisiae chromosome XI. Sequence analysis reveals the presence of 20 open reading frames (ORFs) at least 100 amino acids long. Five of these ORFs correspond to known genes; five others show homology with known proteins; the ten remaining ORFs identified show no detectable homology with other protein sequences contained in data banks and may represent new biological functions. The sequence has been deposited in the EMBL data library under Agreement Number Z26877.
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  • 4
    ISSN: 0749-503X
    Keywords: Saccharomyces cerevisiae ; YHR019 ; chromosome VIII ; asparaginyl-tRNA synthetase ; Life and Medical Sciences ; Genetics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: Exploiting the asparagine auxotrophy of the Saccharomyces cerevisiae mutant strain 8556a, we have isolated the gene for the cytosolic asparaginyl-tRNA synthetase (AsnRS) of S. cerevisiae, by functional complementation of the mutation affecting this strain. The isolated gene could be identified to the open reading frame YHR019, called DED81, located on chromosome VIII. The mutant gene from the 8556a strain, asnrs--1, was amplified from genomic DNA by PCR. This gene contains a point mutation, leading to the replacement of a glycine residue by a serine in a region of the protein probably important for the asparaginyl-adenylate recognition. The protein encoded by YHR019 is very similar to cytosolic AsnRS from other eukaryotic sources. In a phylogenetic analysis based on AsnRS sequences from various organisms, the eukaryotic sequences were clustered. Expression of YHR019 in Escherichia coli demonstrated that a yeast AsnRS activity was produced. The recombinant enzyme was purified to homogeneity in three chromatography steps. We showed that the recombinant S. cerevisiae AsnRS was able to charge unfractionated yeast tRNA, but not E. coli tRNA, with asparagine. © 1998 John Wiley & Sons, Ltd.
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  • 5
    ISSN: 0749-503X
    Keywords: Saccharomyces cerevisiae ; chromosome XII ; DNA sequencing project ; CSE1 protein ; glutaminyl-tRNA synthetase ; ankyrin ; double-stranded RNA adenosine deaminase ; Life and Medical Sciences ; Genetics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: The complete sequence of a 11,132 bp segment located on the left arm of chromosome VII of Saccharomyces cerevisiae has been determined and analysed. Eight open reading frames (ORFs) of at least 100 amino acids were identified. Five show similarities to known amino acid sequences. Another ORF encoding the chromosome segregation protein CSE1 is not entirely located in our sequenced fragment and is incomplete at its C-terminus. The two remaining ORFs do not display similarities to known sequences. The sequence has been deposited in the EMBL Data Library under Accession Number Z49149.
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  • 6
    ISSN: 0749-503X
    Keywords: Saccharomyces cerevisiae ; chromosome XI ; DNA sequencing project ; Life and Medical Sciences ; Genetics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: A 20·5 kb DNA fragment from the left arm of chromosome XI of Saccharomyces cerevisiae has been sequenced and analysed. Thirteen open reading frames (ORFs) for proteins longer than 100 amino acids were discovered. Among them, two are the known genes MRP49 and TPK3; two others encode proteins which show strong similarity with a yeast putative protein kinase and a yeast choline transport protein; one other shows weaker similarity with a yeast Ca2+/calmodulin-dependent protein kinase. Moreover, two putative proteins encoded by ORFs located in the sequenced fragment are closely similar to non-yeast proteins: the Caenorhabditis elegans elongation factor 2 and a glutamic acid-rich protein of Plasmodium falciparum. The sequence has been deposited in the EMBL data library under Accession Number Z26878.
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  • 7
    ISSN: 0749-503X
    Keywords: Saccharomyces cerevisiae ; chromosome X ; DNA sequencing project ; Life and Medical Sciences ; Genetics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: We have sequenced a continuous segment of 17 137 bp on chromosome X. Sequence analysis of this stretch revealed 14 open reading frames (ORFs) at least 100 amino acids long. One gene, encoding the mitochondrial 60S ribosomal protein L8, had already been sequenced. Four ORF products show weak homologies with known protein sequences. The nine remaining ORF products have no homologies with sequences in data banks. The nucleotide sequence of the 17·1 kb fragment is available through the EMBL data library under Accession Number Z34288.
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