Nuclear rRNA transcript processing versus internal transcribed spacer secondary structure.

Nuclear rRNA transcript processing versus internal transcribed spacer secondary structure.
Trends Genet. 2015 Jan 30;
Authors: Coleman AW
Abstract
rRNA is one of the few universal features of life, making it uniquely suited to assess phylogenetic relationships. The processing of the initial polycistronic rRNA transcript is also a conserved process, involving numerous cleavage events and the generation of secondary structures. The secondary structure of the internal transcribed spacer (ITS) regions of nuclear rRNA transcripts are well known for a wide variety of eukaryotes and have been used to aid in the alignment of these sequences for phylogenetic comparisons. By contrast, study of the processing of the initial rRNA transcripts has been largely limited to yeast, mice, rats, and humans. Here I examine the known cleavage sites in the two ITS regions and their positions relative to the secondary structure. A better understanding of the conservation of secondary structures and cleavage sites within the ITS regions will improve evolutionary inferences based on these sequences.
PMID: 25648500 [PubMed - as supplied by publisher]

Source: Trends in Genetics : TIG - January 30, 2015 Category: Genetics & Stem Cells Authors: Coleman AW Tags: Trends Genet Source Type: research