Development of microbial genome-probing microarrays using digital multiple displacement amplification of uncultivated microbial single cells.
A crucial problem in the use of previously developed genome-probing microarrays (GPM) has been the inability to use uncultivated bacterial genomes to take advantage of the high sensitivity and specificity of GPM in microbial detection and monitoring. We show here a method, digital multiple displacement amplification (MDA), to amplify and analyze various genomes obtained from single uncultivated bacterial cells. We used 15 genomes from key microbes involved in dichloromethane (DCM)-dechlorinating enrichment as microarray probes to uncover the bacterial population dynamics of samples without PCR amplification. Genomic DNA amplified from single cells originating from uncultured bacteria with 80.3-99.4% similarity to 16S rRNA genes of cultivated bacteria. The digital MDA-GPM method successfully monitored the dynamics of DCM-dechlorinating communities from different phases of enrichment status. Without a priori knowledge of microbial diversity, the digital MDA-GPM method could be designed to monitor most microbial populations in a given environmental sample.
Chang
Ho-Won
HW
Biological Resources Center, KRIBB, Daejeon 305-806, Korea.
Sung
Youlboong
Y
Kim
Kyoung-Ho
KH
Nam
Young-Do
YD
Roh
Seong Woon
SW
Kim
Min-Soo
MS
Jeon
Che Ok
CO
Bae
Jin-Woo
JW