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Heteroduplex mobility assay-guided sequence discovery: elucidation of the small subunit (18S) rDNA sequences of Pfiesteria piscicida and related dinoflagellates from complex algal culture and environmental sample DNA pools.
- Source :
-
Proceedings of the National Academy of Sciences of the United States of America [Proc Natl Acad Sci U S A] 2000 Apr 11; Vol. 97 (8), pp. 4303-8. - Publication Year :
- 2000
-
Abstract
- The newly described heterotrophic estuarine dinoflagellate Pfiesteria piscicida has been linked with fish kills in field and laboratory settings, and with a novel clinical syndrome of impaired cognition and memory disturbance among humans after presumptive toxin exposure. As a result, there is a pressing need to better characterize the organism and these associations. Advances in Pfiesteria research have been hampered, however, by the absence of genomic sequence data. We employed a sequencing strategy directed by heteroduplex mobility assay to detect Pfiesteria piscicida 18S rDNA "signature" sequences in complex pools of DNA and used those data as the basis for determination of the complete P. piscicida 18S rDNA sequence. Specific PCR assays for P. piscicida and other estuarine heterotrophic dinoflagellates were developed, permitting their detection in algal cultures and in estuarine water samples collected during fish kill and fish lesion events. These tools should enhance efforts to characterize these organisms and their ecological relationships. Heteroduplex mobility assay-directed sequence discovery is broadly applicable, and may be adapted for the detection of genomic sequence data of other novel or nonculturable organisms in complex assemblages.
- Subjects :
- Animals
Base Sequence
DNA Primers
Microscopy, Electron, Scanning
Molecular Sequence Data
Pfiesteria piscicida classification
Phylogeny
Polymerase Chain Reaction
Polymorphism, Single-Stranded Conformational
DNA, Ribosomal genetics
Eukaryota microbiology
Heteroduplex Analysis
Pfiesteria piscicida genetics
RNA, Ribosomal, 18S genetics
Subjects
Details
- Language :
- English
- ISSN :
- 0027-8424
- Volume :
- 97
- Issue :
- 8
- Database :
- MEDLINE
- Journal :
- Proceedings of the National Academy of Sciences of the United States of America
- Publication Type :
- Academic Journal
- Accession number :
- 10760297
- Full Text :
- https://doi.org/10.1073/pnas.97.8.4303