期刊
NUCLEIC ACIDS RESEARCH
卷 34, 期 -, 页码 W704-W707出版社
OXFORD UNIV PRESS
DOI: 10.1093/nar/gkl129
关键词
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The internal transcribed spacer 2 ( ITS2) is a phylo-genetic marker which hasbeenof broad use in generic and infrageneric level classifications, as its sequence evolves comparably fast. Only recently, it became clear, that the ITS2 might be useful even for higher level systematic analyses. As the secondary structure is highly conserved within all eukaryotes it serves as a valuable template for the construction of highly reliable sequence-structure alignments, which build a fundament for subsequent analyses. Thus, any phylogenetic study using ITS2 has to consider both sequence and structure. We have integrated a homology based RNA structure prediction algorithm into a webserver, which allows the detection and secondary structure prediction for ITS2 in any given sequence. Furthermore, the resource contains more than 25 000 pre-calculated secondary structures for the currently known ITS2 sequences. These can be taxonomically searched and browsed. Thus, our resource could become a starting point for ITS2- based phylogenetic analyses and is therefore complementary to databases of other phylogenetic markers, which focus on higher level analyses. The current version of the ITS2 database can be accessed via http://its2.bioapps.biozentrum.uni-wuerzburg.de.
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