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  • 1
    Publication Date: 2002-01-26
    Description: Posttranscriptional gene silencing in Caenorhabditis elegans results from exposure to double-stranded RNA (dsRNA), a phenomenon designated as RNA interference (RNAi), or from co-suppression, in which transgenic DNA leads to silencing of both the transgene and the endogenous gene. Here we show that single-stranded RNA oligomers of antisense polarity can also be potent inducers of gene silencing. As is the case for co-suppression, antisense RNAs act independently of the RNAi genes rde-1 and rde-4 but require the mutator/RNAi gene mut-7 and a putative DEAD box RNA helicase, mut-14. Our data favor the hypothesis that gene silencing is accomplished by RNA primer extension using the mRNA as template, leading to dsRNA that is subsequently degraded.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tijsterman, Marcel -- Ketting, Rene F -- Okihara, Kristy L -- Sijen, Titia -- Plasterk, Ronald H A -- New York, N.Y. -- Science. 2002 Jan 25;295(5555):694-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Hubrecht Laboratory, Center for Biomedical Genetics, Uppsalalaan 8, 3584 CT, Utrecht, Netherlands.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11809977" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Motifs ; Animals ; Caenorhabditis elegans/embryology/enzymology/*genetics ; Caenorhabditis elegans Proteins/chemistry/genetics/*metabolism ; Carrier Proteins/genetics/metabolism ; DEAD-box RNA Helicases/chemistry/genetics/*metabolism ; *Gene Silencing ; *Genes, Helminth ; Genes, Reporter ; Green Fluorescent Proteins ; Luminescent Proteins/genetics/metabolism ; Mutation ; Oligoribonucleotides/genetics ; RNA Helicases/chemistry/genetics/*metabolism ; RNA, Antisense/*genetics ; RNA, Double-Stranded/genetics ; RNA, Helminth/genetics/metabolism ; RNA, Messenger/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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  • 2
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1995-10-20
    Description: Over the past two decades, the small soil nematode Caenorhabditis elegans has become established as a major model system for the study of a great variety of problems in biology and medicine. One of its most significant advantages is its simplicity, both in anatomy and in genomic organization. The entire haploid genetic content amounts to 100 million base pairs of DNA, about 1/30 the size of the human value. As a result, C. elegans has also provided a pilot system for the construction of physical maps of larger animal and plant genomes, and subsequently for the complete sequencing of those genomes. By mid-1995, approximately one-fifth of the complete DNA sequence of this animal had been determined. Caenorhabditis elegans provides a test bed not only for the development and application of mapping and sequencing technologies, but also for the interpretation and use of complete sequence information. This article reviews the progress so far toward a realizable goal--the total description of the genome of a simple animal.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hodgkin, J -- Plasterk, R H -- Waterston, R H -- New York, N.Y. -- Science. 1995 Oct 20;270(5235):410-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Medical Research Council Laboratory of Molecular Biology, Cambridge, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7569995" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Caenorhabditis elegans/*genetics ; *Chromosome Mapping ; Gene Expression ; *Genes, Helminth ; *Genome ; Mutation ; *Sequence Analysis, DNA
    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: 1995-03-17
    Description: The goa-1 gene encoding the alpha subunit of the heterotrimeric guanosine triphosphate-binding protein (G protein) Go from Caenorhabditis elegans is expressed in most neurons, and in the muscles involved in egg laying and male mating. Reduction-of-function mutations in goa-1 caused a variety of behavioral defects including hyperactive movement, premature egg laying, and male impotence. Expression of the activated Go alpha subunit (G alpha o) in transgenic nematodes resulted in lethargic movement, delayed egg laying, and reduced mating efficiency. Induced expression of activated G alpha o in adults was sufficient to cause these phenotypes, indicating that G alpha o mediates behavior through its role in neuronal function and the functioning of specialized muscles.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mendel, J E -- Korswagen, H C -- Liu, K S -- Hajdu-Cronin, Y M -- Simon, M I -- Plasterk, R H -- Sternberg, P W -- New York, N.Y. -- Science. 1995 Mar 17;267(5204):1652-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, California Institute of Technology, Pasadena 91125.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7886455" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Animals, Genetically Modified ; Base Sequence ; Behavior, Animal ; Caenorhabditis elegans/genetics/*physiology ; Disorders of Sex Development ; Female ; GTP-Binding Proteins/genetics/*physiology ; Genes, Helminth ; Male ; Molecular Sequence Data ; Movement ; Muscles/innervation/physiology ; Mutation ; Neurons/physiology ; Oviposition ; Phenotype ; Serotonin/pharmacology ; Sexual Behavior, Animal
    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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