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Trends Biochem Sci. 2004 Aug;29(8):436-44.

'Cap-tabolism'.

Author information

  • 1Equipe Labellisée La Ligue, Centre de Génétique Moléculaire, CNRS UPR2167 associé à l'Université Paris 6, Avenue de la Terrasse, 91198 Gif sur Yvette, France.

Abstract

distinctive feature of eukaryotic mRNA and small nuclear RNA (snRNA) that are transcribed by RNA polymerase II (Pol II) is the presence of a cap structure at their 5' end. This essential modification serves as an inviting 'landing pad' for factors that are involved in various cellular processes such as pre-mRNA splicing, nucleocytoplasmic RNA export and localization, and translation initiation. Because of the important functions mediated by the mRNA cap, this structure needs to be modified and/or degraded in a tightly controlled manner. Several cellular and viral systems implicated in cap metabolism have been uncovered recently; their analyses provide interesting new information on cell structure and function.

PMID:
15362228
[PubMed - indexed for MEDLINE]
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