A comparison of rpoB and 16S rRNA as markers in pyrosequencing studies of bacterial diversity

Vos, M., Quince, C., Pijl, A.S., de Hollander, M. and Kowalchuk, G.A. (2012) A comparison of rpoB and 16S rRNA as markers in pyrosequencing studies of bacterial diversity. PLoS ONE, 7(2), e30600. (doi: 10.1371/journal.pone.0030600) (PMID:22355318) (PMCID:PMC3280256)

Abstract

Background: The 16S rRNA gene is the gold standard in molecular surveys of bacterial and archaeal diversity, but it has the disadvantages that it is often multiple-copy, has little resolution below the species level and cannot be readily interpreted in an evolutionary framework. We compared the 16S rRNA marker with the single-copy, protein-coding rpoB marker by amplifying and sequencing both from a single soil sample. Because the higher genetic resolution of the rpoB gene prohibits its use as a universal marker, we employed consensus-degenerate primers targeting the Proteobacteria. <p/>Methodology/Principal Findings: Pyrosequencing can be problematic because of the poor resolution of homopolymer runs. As these erroneous runs disrupt the reading frame of protein-coding sequences, removal of sequences containing nonsense mutations was found to be a valuable filter in addition to flowgram-based denoising. Although both markers gave similar estimates of total diversity, the rpoB marker revealed more species, requiring an order of magnitude fewer reads to obtain 90% of the true diversity. The application of population genetic methods was demonstrated on a particularly abundant sequence cluster. <p/>Conclusions/Significance: The rpoB marker can be a complement to the 16S rRNA marker for high throughput microbial diversity studies focusing on specific taxonomic groups. Additional error filtering is possible and tests for recombination or selection can be employed.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Quince, Dr Christopher
• Authors: Vos, M., Quince, C., Pijl, A.S., de Hollander, M., and Kowalchuk, G.A.
• College/School: College of Science and Engineering > School of Engineering > Infrastructure and Environment
• Journal Name: PLoS ONE
• Publisher: Public Library of Science
• ISSN: 1932-6203
• ISSN (Online): 1932-6203
• Published Online: 15 February 2012
• Copyright Holders: Copyright © 2012 The Authors
• First Published: First published in PLoS ONE 7(2):e30600
• Publisher Policy: Reproduced under a Creative Commons License