Abstract:
:A metagenomic approach was taken to investigate the genetic basis for the ability of an anaerobic consortium to grow on either 4-chlorobenzoate or 4-bromobenzoate under denitrifying conditions. Degenerate PCR primers were designed for the family of 4-chlorobenzoyl-CoA dehalogenase genes. The primers were utilized to screen a metagenome library and two overlapping clones were identified which yield a PCR product. The complete sequence of one metagenome clone was determined and genes encoding 4-chlorobenzoyl-CoA ligase (FcbA) and 4-chlorobenzoyl-CoA dehalogenase (FcbB) were identified. Analysis of the ORFs present in the nucleotide sequence suggests that the metagenome clone originated from an uncultured denitrifying microorganism belonging to the Betaproteobacteria. Interestingly, unlike similar gene clusters reported in aerobes, a gene encoding 4-hydroxybenzoyl-CoA thioesterase was not present in the gene cluster. This suggests that 4-hydroxybenzoyl-CoA is further degraded via the anaerobic reduction pathway in the corresponding microorganism instead of through thioester hydrolysis to yield 4-hydroxybenzoate.
journal_name
FEMS Microbiol Lettjournal_title
FEMS microbiology lettersauthors
Chae JC,Song B,Zylstra GJdoi
10.1111/j.1574-6968.2008.01106.xsubject
Has Abstractpub_date
2008-04-01 00:00:00pages
203-9issue
2eissn
0378-1097issn
1574-6968pii
FML1106journal_volume
281pub_type
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