Improved performance of the PacBio SMRT technology for 16S rDNA sequencing

Area of Science:

• Molecular Biology
• Genomics
• Environmental Microbiology

Background:

• Accurate microbial identification is crucial for understanding environmental ecosystems.
• Previous sequencing technologies had limitations in read length and accuracy for complex samples.
• 16S ribosomal RNA (rRNA) gene sequencing is a standard method for microbial community analysis.

Purpose of the Study:

• To evaluate the performance of an upgraded Pacific Biosciences (PacBio) single molecule, real-time (SMRT) sequencing platform for 16S amplicon sequencing.
• To compare the accuracy and read length of the new PacBio system against existing platforms like Roche/454 pyrosequencing.
• To assess the potential of the PacBio system for high-resolution microbial identification in environmental samples.

Main Methods:

• Sequencing of 16S amplicons from environmental samples and a pure culture using the PacBio RS II system with P4/C2 chemistry.
• Utilized previously constructed DNA libraries (Mosher et al., 2013).
• Comparative analysis of sequencing accuracy and read length against Roche/454 pyrosequencing data.

Main Results:

• The upgraded PacBio SMRT sequencing platform demonstrated improved accuracy for 16S amplicons.
• The PacBio RS II system with P4/C2 chemistry provided higher accuracy than Roche/454 pyrosequencing.
• Achieved accurate read lengths exceeding 1400 base pairs, facilitating detailed microbial analysis.

Conclusions:

• The enhanced PacBio SMRT sequencing technology significantly improves the accuracy of 16S amplicon sequencing.
• The platform's long and accurate reads are suitable for identifying microorganisms to the species level.
• This advancement holds promise for more comprehensive microbial community studies in diverse environmental settings.