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Microbiota Analysis Using Two-step PCR and Next-generation 16S rRNA Gene Sequencing
Published on: October 15, 2019
Deciphering RNA structural diversity and systematic phylogeny from microbial metagenomes
Yanglong Zhu1, Dileep K Pulukkunat, Yong Li
1Department of Biochemistry and Molecular Biology, and Center for Genetics and Molecular Medicine, School of Medicine, University of Louisville, Louisville, KY 40202, USA.
Nucleic Acids Research
|March 29, 2007
Summary
Metagenomics analysis identified 328 RNase P RNA genes, expanding prokaryotic catalytic RNA diversity by 60%. Researchers found only Type A P RNAs, challenging existing classifications and highlighting new structural features.
Area of Science:
- Microbiology
- Bioinformatics
- Molecular Biology
Background:
- Metagenomics enables studying genetic material from environmental samples.
- Identifying noncoding RNA genes, like RNase P RNA (P RNA), in metagenomic data is challenging.
- P RNA is a crucial RNA subunit of the endoribonuclease RNase P, essential for tRNA maturation.
Purpose of the Study:
- To identify, validate, and analyze P RNA genes from published metagenomic projects.
- To expand the known diversity of prokaryotic P RNAs.
- To investigate the structural and phylogenetic characteristics of newly discovered P RNAs.
Main Methods:
- Systematic sequencing and analysis of metagenomic data.
- Identification and classification of P RNA genes.
- Experimental validation of an archaeal P RNA.
- Phylogenetic analysis using covariance models.
Main Results:
- Discovered 328 novel P RNAs (320 bacterial, 8 archaeal), increasing known prokaryotic P RNAs by 60%.
- All identified P RNAs were Type A, with no Type B bacterial or Type M archaeal P RNAs found.
- Experimental validation confirmed the authenticity of a novel archaeal P RNA.
- Identified unique structural features, including kinked nucleotides in the P2 stem and variations in the J2/3 joint region.
Conclusions:
- Metagenomics significantly expands the known diversity of P RNA.
- The prevalence of Type A P RNAs suggests a potential bias or specific evolutionary trajectory in sequenced environments.
- Structural variations in P RNAs challenge existing classification criteria and necessitate refined phylogenetic analyses.
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