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Critical Reviews™ in Eukaryotic Gene Expression

Erscheint 6 Ausgaben pro Jahr

ISSN Druckformat: 1045-4403

ISSN Online: 2162-6502

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 1.6 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 2.2 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.3 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00058 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.33 SJR: 0.345 SNIP: 0.46 CiteScore™:: 2.5 H-Index: 67

Indexed in

Nuclear snRNA and Nuclear Function (Discovery of 5′ Cap Structures in RNA)

Volumen 9, Ausgabe 2, 1999, pp. 107-158
DOI: 10.1615/CritRevEukarGeneExpr.v9.i2.20
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ABSTRAKT

In view of the fact that eukaryotic gene expression starts in the nucleus, it is important to have a thorough understanding of nuclear macromolecular structure and function. Newly discovered snRNAs are eukaryotic cell specific and have unique subnuclear compartmental localizations. There are over 200 nucleolar-specific RNAs that include some abundant U3, U8, and U13 RNAs. Extranucleolar-nuclear-specific RNAs (snRNA) are 4.5S RNA I, II, III, 5S RNA III, Ul, U2, U4, U5, and U6, in addition to over 500 different RNA species reported up to now. In particular, some snoRNAs and snRNAs have trimethylguanosine cap structures that are not present in bacteria. They have crucial roles in gene expression, such as transcription (U3 snoRNA), processing (U3, U8, U13, U14, U22, and7-2/MRP), methylation (U14-16, U18, U20-21, andU24-63), pseudouridylation (E2, E3, U19, U23, and U64-72), and hnRNA splicing (Ul, U2, U4, U5, and U6 snRNA).

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