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Record 1 of 2147
Identification of characteristic oligonucleotides in the bacterial 16S ribosomal RNA sequence dataset
External Online Source: doi:10.1093/bioinformatics/18.2.244
Author and Affiliation:
Zhang, Zhengdong(University of Houston, Department of Biology and Biochemistry, Houston, TX 77204-5001, United States)
Willson, Richard C.
Fox, George E.
Abstract: MOTIVATION: The phylogenetic structure of the bacterial world has been intensively studied by comparing sequences of 16S ribosomal RNA (16S rRNA). This database of sequences is now widely used to design probes for the detection of specific bacteria or groups of bacteria one at a time. The success of such methods reflects the fact that there are local sequence segments that are highly characteristic of particular organisms or groups of organisms. It is not clear, however, the extent to which such signature sequences exist in the 16S rRNA dataset. A better understanding of the numbers and distribution of highly informative oligonucleotide sequences may facilitate the design of hybridization arrays that can characterize the phylogenetic position of an unknown organism or serve as the basis for the development of novel approaches for use in bacterial identification. RESULTS: A computer-based algorithm that characterizes the extent to which any individual oligonucleotide sequence in 16S rRNA is characteristic of any particular bacterial grouping was developed. A measure of signature quality, Q(s), was formulated and subsequently calculated for every individual oligonucleotide sequence in the size range of 5-11 nucleotides and for 15mers with reference to each cluster and subcluster in a 929 organism representative phylogenetic tree. Subsequently, the perfect signature sequences were compared to the full set of 7322 sequences to see how common false positives were. The work completed here establishes beyond any doubt that highly characteristic oligonucleotides exist in the bacterial 16S rRNA sequence dataset in large numbers. Over 16,000 15mers were identified that might be useful as signatures. Signature oligonucleotides are available for over 80% of the nodes in the representative tree.
Publication Date: Feb 01, 2002
Document ID:
20040088464
(Acquired Sep 07, 2004)
Subject Category: LIFE SCIENCES (GENERAL)
Document Type: Journal Article
Publication Information: Bioinformatics (Oxford, England) (ISSN 1367-4803); Volume 18; 2; 244-50
Publisher Information: United Kingdom
Description: In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: BACTERIA; DATA BASES; NUCLEIC ACIDS; RIBONUCLEIC ACIDS; ALGORITHMS; BIOLOGY; CLASSIFICATIONS; POLYNUCLEOTIDES
Other Descriptors: DATABASES, NUCLEIC ACID; RNA, BACTERIAL/GENETICS; RNA, RIBOSOMAL, 16S/GENETICS; ALGORITHMS; BACTERIA/CLASSIFICATION/GENETICS; COMPUTATIONAL BIOLOGY; OLIGORIBONUCLEOTIDES/GENETICS; PHYLOGENY; SUPPORT, U.S. GOV'T, NON-P.H.S; NASA DISCIPLINE LIFE SCIENCES TECHNOLOGIES; NON-NASA CENTER
Availability Source: Other Sources
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