ArticleBMC genomics2014
The wide expansion of hepatitis delta virus-like ribozymes throughout trypanosomatid genomes is linked to the spreading of L1Tc/ingi clade mobile elements.
Article in BMC genomics, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
4 citing papers in PubMed, 13 citations in OpenAlex.
- Article
- Article
- The Trypanosomatid Pr77-hallmark contains a downstream core promoter element essential for transcription activity of the Trypanosoma cruzi L1Tc retrotransposon.BMC genomics · 2016Article
- A Two-Metal-Ion-Mediated Conformational Switching Pathway for HDV Ribozyme Activation.ACS catalysis · 2016Article
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5 authors at 3 institutions in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
backgroundHepatitis Delta Virus (HDV)-like ribozymes have recently been found in many mobile elements in which they take part in a mechanism that releases intermediate RNAs from cellular co-transcripts. L1Tc in Trypanosoma cruzi is one of the elements in which such a ribozyme is located. It lies in the so-called Pr77-hallmark, a conserved region shared by retrotransposons belonging to the trypanosomatid L1Tc/ingi clade. The wide distribution of the Pr77-hallmark detected in trypanosomatid retrotransposons renders the potential catalytic activity of these elements worthy of study: their distribution might contribute to host genetic regulation at the mRNA level. Indeed, in Leishmania spp, the pervasive presence of these HDV-like ribozyme-containing mobile elements in certain 3'-untranslated regions of protein-coding genes has been linked to mRNA downregulation.
resultsIntensive screening of publicly available trypanosomatid genomes, combined with manual folding analyses, allowed the isolation of putatively Pr77-hallmarks with HDV-like ribozyme activity. This work describes the conservation of an HDV-like ribozyme structure in the Pr77 sequence of retrotransposons in a wide range of trypanosomatids, the catalytic function of which is maintained in the majority.These results are consistent with the previously suggested common phylogenetic origin of the elements that belong to this clade, although in some cases loss of functionality appears to have occurred and/or perhaps molecular domestication by the host.
conclusionsThese HDV-like ribozymes are widely distributed within retrotransposons across trypanosomatid genomes. This type of ribozyme was once thought to be rare in nature, but in fact it would seem to be abundant in trypanosomatid transcripts. It can even form part of the pool of mRNA 3'-untranslated regions, particularly in Leishmania spp. Its putative regulatory role in host genetic expression is discussed.
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