title: Quantification of mcrA by fluorescent PCR in methanogenic and methanotrophic microbial communities.
abstract: A quantitative fluorogenic PCR method for detecting methanogenic and methanotrophic orders was established using a refined primer set for the methyl coenzyme M reductase subunit A gene (mcrA). The method developed was applied to several microbial communities in which diversity and abundance of methanogens or anaerobic methanotrophs (ANMEs) was identified by 16S rRNA gene clone analysis, and strong correlations between the copy numbers of mcrA with those of archaeal 16S rRNA genes in the communities were observed. The assay can be applied to detecting and assessing the abundance of methanogens and/or ANMEs in anoxic environments that could not be detected by 16S rRNA gene sequence analyses.
authors.affiliation: Subground Animalcule Retrieval (SUGAR) Program, Extremobiosphere Research Center, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Japan. takuron@jamstec.go.jp
authors.forename: Takuro
authors.initials: T
authors.lastname: Nunoura
authors.forename: Hanako
authors.initials: H
authors.lastname: Oida
authors.forename: Junichi
authors.initials: J
authors.lastname: Miyazaki
authors.forename: Ai
authors.initials: A
authors.lastname: Miyashita
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Imachi
authors.forename: Ken
authors.initials: K
authors.lastname: Takai
mesh_terms: D001105:Archaea / Q000201:enzymology*; D019843:Archaeal Proteins / Q000235:genetics; D017931:DNA Primers / Q000235:genetics; D019641:DNA, Archaeal / Q000235:genetics; D004275:DNA, Ribosomal / Q000235:genetics; D005453:Fluorescence; D018628:Gene Dosage; D008697:Methane / Q000378:metabolism*; D010088:Oxidoreductases / Q000235:genetics*; D016133:Polymerase Chain Reaction / Q000379:methods*; D012336:RNA, Ribosomal, 16S / Q000235:genetics
chemical_list: D019843:Archaeal Proteins; D017931:DNA Primers; D019641:DNA, Archaeal; D004275:DNA, Ribosomal; D012336:RNA, Ribosomal, 16S; D010088:Oxidoreductases; C021572:methyl coenzyme M reductase; D008697:Methane