Abstract:
:The oomycetes, a distinct phylogenetic lineage of fungus-like microorganisms, are heterokonts (stramenopiles) belonging to the supergroup Chromalveolata. Although the complete genomic sequences of a number of oomycetes have been reported, little information regarding the introns therein is available. Here, we investigated the introns of Phytophthora sojae, a pathogen that causes soybean root and stem rot, by a comparative analysis of genomic sequences and expressed sequence tags. A total of 4013 introns were identified, of which 96.6% contained canonical splice sites. The P. sojae genome possessed features distinct from other organisms at 5' splice sites, polypyrimidine tracts, branch sites, and 3' splice sites. Diverse repeating sequences, ranging from 2 to 10 nucleotides in length, were found at more than half of the intron-exon boundaries. Furthermore, 122 genes underwent alternative splicing. These data indicate that P. sojae has unique splicing mechanisms, and recognition of those mechanisms may lead to more accurate predictions of the location of introns in P. sojae and even other oomycete species.
journal_name
Can J Microbioljournal_title
Canadian journal of microbiologyauthors
Shen D,Ye W,Dong S,Wang Y,Dou Ddoi
10.1139/w10-103subject
Has Abstractpub_date
2011-02-01 00:00:00pages
84-90issue
2eissn
0008-4166issn
1480-3275pii
w10-103journal_volume
57pub_type
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