منابع مشابه
Identification of RNA binding motifs in the R2 retrotransposon-encoded reverse transcriptase
R2 non-LTR retrotransposons insert at a specific site in the 28S rRNA genes of many animal phyla. R2 elements encode a single polypeptide with reverse transcriptase, endonuclease and nucleic acid binding domains. Integration involves separate cleavage of the two DNA strands at the target site and utilization of the released 3' ends to prime DNA synthesis. Critical to this integration is the abi...
متن کاملLong-term inheritance of the 28S rDNA-specific retrotransposon R2.
R2 is a non-long-terminal-repeat (LTR) retrotransposon that inserts specifically into 28S rDNA. R2 has been identified in many species of arthropods and three species of chordates. R2 may be even more widely distributed in animals, and its origin may be traceable to early animal evolution. In this study, we identified R2 elements in medaka fish, White Cloud Mountain minnow, Reeves' turtle, hagf...
متن کاملRNA from the 5' end of the R2 retrotransposon controls R2 protein binding to and cleavage of its DNA target site.
Non-LTR retrotransposons insert into eukaryotic genomes by target-primed reverse transcription (TPRT), a process in which cleaved DNA targets are used to prime reverse transcription of the element's RNA transcript. Many of the steps in the integration pathway of these elements can be characterized in vitro for the R2 element because of the rigid sequence specificity of R2 for both its DNA targe...
متن کاملNMR-Assisted Prediction of RNA Secondary Structure: Identification of a Probable Pseudoknot in the Coding Region of an R2 Retrotransposon
As the rate of functional RNA sequence discovery escalates, high-throughput techniques for reliable structural determination are becoming crucial for revealing the essential features of these RNAs in a timely fashion. Computational predictions of RNA secondary structure quickly generate reasonable models but suffer from several approximations, including overly simplified models and incomplete k...
متن کاملEvolution of the R2 Retrotransposon Ribozyme and Its Self-Cleavage Site
R2 is a non-long terminal repeat retrotransposon that inserts site-specifically in the tandem 28S rRNA genes of many animals. Previously, R2 RNA from various species of Drosophila was shown to self-cleave from the 28S rRNA/R2 co-transcript by a hepatitis D virus (HDV)-like ribozyme encoded at its 5' end. RNA cleavage was at the precise 5' junction of the element with the 28S gene. Here we repor...
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ژورنال
عنوان ژورنال: RNA Biology
سال: 2011
ISSN: 1547-6286,1555-8584
DOI: 10.4161/rna.8.5.16033