کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2187071 | 1096096 | 2008 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Molecular Evolution of the HBII-52 snoRNA Cluster Molecular Evolution of the HBII-52 snoRNA Cluster](/preview/png/2187071.png)
HBII-52 is a human brain-specific C/D box snoRNA that potentially regulates the editing and/or alternative splicing of the serotonin receptor. Forty-two nearly identical copies of the HBII-52 gene are located immediately downstream of the SNRPN protein-coding gene in an imprinted locus associated with Prader–Willi syndrome. Other eutherian mammals, with genomic assemblies covering the corresponding locus, also have multiple orthologous copies of HBII-52. The SNRPB gene, which is known to have given rise to SNRPN through gene duplication, expresses a C/D box snoRNA, SNORD119, from its fifth intron. Here we show that, despite the fact that they lie in different positions relative to the orthologous SNRPB/SNRPN coding sequences, there are significant sequence similarities between SNORD119 and HBII-52, including the antisense element and the stem-forming regions. By analysing these snoRNAs in marsupial and eutherian mammal genomes, we reconstruct the likely evolutionary history of the HBII-52 cluster and SNORD119 and suggest that they have evolved from a common ancestor.
Journal: Journal of Molecular Biology - Volume 381, Issue 4, 12 September 2008, Pages 810–815