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  • Mutation  (25)
  • Molecular Sequence Data
  • American Association for the Advancement of Science (AAAS)  (28)
  • 1985-1989  (28)
  • 1985  (28)
Collection
Publisher
  • American Association for the Advancement of Science (AAAS)  (28)
  • Springer  (3)
Years
  • 1985-1989  (28)
Year
  • 1
    Publication Date: 1985-11-01
    Description: Aedes triseriatus mosquitoes became dually infected after ingesting two mutants of LaCrosse (LAC) virus simultaneously or after ingesting, by interrupted feeding, the two viruses sequentially within a 2-day period. After 2 weeks of incubation, approximately 25 percent of the vectors contained new virus genotypes as the result of RNA segment reassortment. New viruses were transmitted when the mosquitoes fed on mice. Viruses ingested more than 2 days after the initial infecting virus did not cause superinfection of the mosquito vectors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Beaty, B J -- Sundin, D R -- Chandler, L J -- Bishop, D H -- AI 15400/AI/NIAID NIH HHS/ -- AI 19688/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1985 Nov 1;230(4725):548-50.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/4048949" target="_blank"〉PubMed〈/a〉
    Keywords: Aedes/*microbiology ; Animals ; Blood ; Bunyaviridae/*genetics ; Genotype ; Insect Vectors ; Mutation ; Phenotype ; RNA, Viral/analysis ; Time Factors
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 2
    Publication Date: 1985-05-24
    Description: Most of the nuclear genome of warm-blooded vertebrates is a mosaic of very long (much greater than 200 kilobases) DNA segments, the isochores; these isochores are fairly homogeneous in base composition and belong to a small number of major classes distinguished by differences in guanine-cytosine (GC) content. The families of DNA molecules derived from such classes can be separated and used to study the genome distribution of any sequence which can be probed. This approach has revealed (i) that the distribution of genes, integrated viral sequences, and interspersed repeats is highly nonuniform in the genome, and (ii) that the base composition and ratio of CpG to GpC in both coding and noncoding sequences, as well as codon usage, mainly depend on the GC content of the isochores harboring the sequences. The compositional compartmentalization of the genome of warm-blooded vertebrates is discussed with respect to its evolutionary origin, its causes, and its effects on chromosome structure and function.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bernardi, G -- Olofsson, B -- Filipski, J -- Zerial, M -- Salinas, J -- Cuny, G -- Meunier-Rotival, M -- Rodier, F -- New York, N.Y. -- Science. 1985 May 24;228(4702):953-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/4001930" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Composition ; Base Sequence ; Biological Evolution ; Centrifugation, Density Gradient ; Chickens/*genetics ; Chromosome Banding ; Codon ; Cytosine/analysis ; DNA/analysis/*genetics ; DNA Replication ; DNA, Viral/genetics ; Gene Amplification ; *Genes ; Genes, Viral ; Guanine/analysis ; Humans ; Mammals/*genetics ; Mice/genetics ; Mutation ; Rabbits/genetics ; Recombination, Genetic ; Repetitive Sequences, Nucleic Acid ; Xenopus/*genetics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
    Publication Date: 1985-05-24
    Description: The in vitro splicing reactions of pre-messenger RNA (pre-mRNA) in a yeast extract were analyzed by glycerol gradient centrifugation. Labeled pre-mRNA appears in a 40S peak only if the pre-mRNA undergoes the first of the two partial splicing reactions. RNA analysis after extraction of glycerol gradient fractions shows that lariat-form intermediates, molecules that occur only in mRNA splicing, are found almost exclusively in this 40S complex. Another reaction intermediate, cut 5' exon RNA, can also be found concentrated in this complex. The complex is stable even in 400 mM KCl, although at this salt concentration, it sediments at 35S and is clearly distinguishable from 40S ribosomal subunits. This complex, termed a "spliceosome," is thought to contain components necessary for mRNA splicing; its existence can explain how separated exons on pre-mRNA are brought into contact.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brody, E -- Abelson, J -- New York, N.Y. -- Science. 1985 May 24;228(4702):963-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3890181" target="_blank"〉PubMed〈/a〉
    Keywords: Actins/genetics ; Base Sequence ; Centrifugation, Density Gradient ; Mutation ; Nucleic Acid Conformation ; Nucleic Acid Precursors/*genetics/metabolism ; RNA Precursors ; *RNA Splicing ; RNA, Fungal/*genetics/metabolism ; RNA, Messenger/*genetics/metabolism ; Saccharomyces cerevisiae/*genetics/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1985-06-28
    Description: The var1 gene specifies the only mitochondrial ribosomal protein known to be encoded by yeast mitochondrial DNA. The gene is unusual in that its base composition is nearly 90 percent adenine plus thymine. It and its expression product show a strain-dependent variation in size of up to 7 percent; this variation does not detectably interfere with function. Furthermore, var1 is an expandable gene that participates in a novel recombinational event resembling gene conversion whereby shorter alleles are preferentially converted to longer ones. The remarkable features of var1 indicate that it may have evolved by a mechanism analogous to exon shuffling, although no introns are actually present.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Butow, R A -- Perlman, P S -- Grossman, L I -- GM-22525/GM/NIGMS NIH HHS/ -- GM-26546/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1985 Jun 28;228(4707):1496-501.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2990030" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Base Sequence ; Biological Evolution ; DNA Restriction Enzymes/metabolism ; DNA, Mitochondrial/*analysis ; *Genes, Fungal ; Mutation ; Neurospora/*genetics ; Polymorphism, Genetic
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 5
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1985-05-10
    Description: Proto-onc genes are normal cellular genes that are related to the transforming (onc) genes of retroviruses. Because of this relationship these genes are now widely believed to be potential cancer genes. In some tumors, proto-onc genes are mutated or expressed more than in normal cells. Under these conditions, proto-onc genes are hypothesized to be active cancer genes in one of two possible ways: The one gene-one cancer hypothesis suggests that one activated proto-onc gene is sufficient to cause cancer. The multigene-one cancer hypothesis suggests that an activated proto-onc gene is a necessary but not a sufficient cause of cancer. However, mutated or transcriptionally activated proto-onc genes are not consistently associated with the tumors in which they are occasionally found and do not transform primary cells. Further, no set of an activated proto-onc gene and a complementary cancer gene with transforming function has yet been isolated from a tumor. Thus, there is still no proof that activated proto-onc genes are sufficient or even necessary to cause cancer.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Duesberg, P H -- CA 11426/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1985 May 10;228(4700):669-77.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3992240" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Transformation, Neoplastic/metabolism ; Chickens ; DNA, Neoplasm/genetics ; Genes, Viral ; Humans ; Kirsten murine sarcoma virus/genetics ; Lymphoma/genetics ; Melanoma/genetics ; Mice ; Mutation ; Neoplasms/etiology/*genetics ; *Oncogenes ; Plasmacytoma/genetics ; Rats ; Retroviridae/genetics ; Sarcoma, Experimental/genetics ; Transduction, Genetic ; Translocation, Genetic ; Tumor Virus Infections/genetics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 6
    Publication Date: 1985-11-01
    Description: The 21-base pair repeat elements of the SV40 promoter contain six tandem copies of the GGGCGG hexanucleotide (GC-box), each of which can bind, with varying affinity, to the cellular transcription factor, Sp1. In vitro SV40 early RNA synthesis is mediated by interaction of Sp1 with GC-boxes I, II, and III, whereas transcription in the late direction is mediated by binding to GC-boxes III, V, and VI.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gidoni, D -- Kadonaga, J T -- Barrera-Saldana, H -- Takahashi, K -- Chambon, P -- Tjian, R -- New York, N.Y. -- Science. 1985 Nov 1;230(4725):511-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2996137" target="_blank"〉PubMed〈/a〉
    Keywords: Autoradiography ; Base Sequence ; Binding Sites ; DNA-Binding Proteins/*metabolism ; Deoxyribonuclease I/metabolism ; Electrophoresis, Polyacrylamide Gel ; Gene Expression Regulation ; Mutation ; Pregnancy Proteins/*metabolism ; RNA, Messenger/analysis ; RNA, Viral/biosynthesis ; Simian virus 40/*genetics ; Sp1 Transcription Factor ; Templates, Genetic ; Transcription Factors/*metabolism ; *Transcription, Genetic
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 7
    Publication Date: 1985-11-29
    Description: Phototransduction is the process by which light-stimulated photoreceptor cells of the visual system send electrical signals to the nervous system. Many of the steps that follow the initial event in phototransduction, absorption of light by rhodopsin, are ill-defined. The fruitfly, Drosophila melanogaster, provides a means to dissect phototransduction genetically. Mutations such as transient receptor potential (trp) affect intermediate steps in phototransduction. In order to facilitate molecular studies of phototransduction, the trp gene was isolated and its identity was confirmed by complementing the mutant trpCM allele of the trp gene by P-element mediated germline transformation of a 7.1-kilobase DNA fragment. Expression of the trp gene begins late in pupal development and appears to be limited to the eyes and ocelli.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Montell, C -- Jones, K -- Hafen, E -- Rubin, G -- New York, N.Y. -- Science. 1985 Nov 29;230(4729):1040-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3933112" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; DNA/genetics ; Drosophila melanogaster/*genetics/physiology ; Gene Expression Regulation ; Genes ; Mutation ; Ocular Physiological Phenomena ; RNA, Messenger/genetics ; *Vision, Ocular
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  • 8
    Publication Date: 1985-06-07
    Description: Measles virus generally produces acute illness. Rarely, however, persistent infection of brain cells occurs, resulting in a chronic and fatal neurological disease, subacute sclerosing panencephalitis (SSPE). Evidence indicates that expression of the measles virus matrix protein is selectively restricted in this persistent infection, but the mechanism underlying this restriction has not been identified. Defective translation of matrix messenger RNA has been described in one SSPE cell line. This report presents evidence that in a different SSPE tissue culture cell line IP-3-Ca, the matrix protein is synthesized but fails to accumulate. A general scheme is proposed to reconcile the different levels at which restriction of matrix protein has been observed.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sheppard, R D -- Raine, C S -- Bornstein, M B -- Udem, S A -- CA13330-12/CA/NCI NIH HHS/ -- NS 08952/NS/NINDS NIH HHS/ -- NS 11920/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1985 Jun 7;228(4704):1219-21.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/4001938" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Line ; Gene Expression Regulation ; Humans ; Hydrolysis ; Measles virus/genetics/growth & development/*metabolism ; Molecular Weight ; Mutation ; Protein Processing, Post-Translational ; Subacute Sclerosing Panencephalitis/*microbiology ; Viral Matrix Proteins ; Viral Proteins/*biosynthesis/genetics ; Virus Replication
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 9
    Publication Date: 1985-08-23
    Description: The complete nucleotide sequence of the coding region of the circumsporozoite antigen gene (CS gene) of the Nuri strain of the malarial parasite Plasmodium knowlesi is presented. The gene from the Nuri strain exhibits a novel form of sequence diversity when compared to the CS gene from the H strain. Instead of the 12 tandem repeating 36-base pair units of the H strain, the Nuri strain contains 16 tandem repeating 27-base pair units of a different nucleotide sequence that encodes a different repeating peptide. In contrast, the 5' and 3' coding and noncoding sequences flanking the repeats are 98 percent conserved in both strains.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sharma, S -- Svec, P -- Mitchell, G H -- Godson, G N -- 1 R01 AI21496-01/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1985 Aug 23;229(4715):779-82.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/4023712" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Antigens, Protozoan/*genetics ; Antigens, Surface/genetics ; Base Sequence ; Genes ; Molecular Sequence Data ; Plasmodium/*genetics/immunology ; Protozoan Proteins/*genetics ; Repetitive Sequences, Nucleic Acid
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    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 10
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1985-09-20
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smith, R A -- Duncan, M J -- Moir, D T -- New York, N.Y. -- Science. 1985 Sep 20;229(4719):1219-24.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3939723" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cattle ; Chymosin/*secretion ; Cloning, Molecular ; Cytoplasm/enzymology ; Enzyme Activation ; Enzyme Precursors/*secretion ; Fungal Proteins/secretion ; Glycosylation ; Mutation ; Plasmids ; Protein Processing, Post-Translational ; Recombinant Fusion Proteins/secretion ; Saccharomyces cerevisiae/enzymology/*genetics ; Solubility
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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