Molecular characterization of functional and phylogenetic genes from natural populations of methanotrophs in lake sediments

Andria M. Costello, Mary E. Lidstrom

Research output: Contribution to journalArticlepeer-review

393 Scopus citations

Abstract

The 16S rRNA and pmoA genes from natural populations of methane- oxidizing bacteria (methanotrophs) were PCR amplified from total community DNA extracted from Lake Washington sediments obtained from the area where peak methane oxidation occurred. Clone libraries were constructed for each of the genes, and approximately 200 clones from each library were analyzed by using restriction fragment length polymorphism (RFLP) and the tetrameric restriction enzymes MspI, HaeIII, and HhaI. The PCR products were grouped based on their RFLP patterns, and representatives of each group were sequenced and analyzed. Studies of the 16S rRNA data obtained indicated that the existing primers did not reveal the total methanotrophic diversity present when these data were compared with pure-culture data obtained from the same environment. New primers specific for methanotrophs belonging to the genera Methylomonas, Methylosinus, and Methylocystis were developed and used to construct more complete clone libraries. Furthermore, a new primer was designed for one of the genes of the particulate methane monooxygenase in methanotrophs, pmoA. Phylogenetic analyses of both the 16S rRNA and pmoA gene sequences indicated that the new primers should detect these genes over the known diversity in methanotrophs. In addition to these findings, 16S rRNA data obtained in this study were combined with previously described phylogenetic data in order to identify operational taxonomic units that can be used to identify methanotrophs at the genus level.

Original languageEnglish (US)
Pages (from-to)5066-5074
Number of pages9
JournalApplied and Environmental Microbiology
Volume65
Issue number11
DOIs
StatePublished - Nov 1999

ASJC Scopus subject areas

  • Biotechnology
  • Food Science
  • Applied Microbiology and Biotechnology
  • Ecology

Fingerprint Dive into the research topics of 'Molecular characterization of functional and phylogenetic genes from natural populations of methanotrophs in lake sediments'. Together they form a unique fingerprint.

Cite this