Identification and genome analysis of SJTR1, a novel 17β-estradiol degradation bacterium.

Biodegradation with microorganisms is considered as an efficient strategy to remove the environmental pollutants. In this work, SJTR1 isolated from the wastewater was confirmed with great degradation capability to 17β-estradiol, one typical estrogen chemical. It could degrade nearly 90% of 17β-estradiol (10 mg/L) in 5 days and transform it into estrone; its degradation kinetics fitted for the first-order kinetic equation. The whole genome sequence of SJTR1 was obtained and annotated, containing one chromosome (3,315,586 bp) and four plasmids (ranging from 17,267 bp to 460,244 bp). A total of 3913 CDSs and 73 RNA genes (including 12 rRNA genes, 50 tRNA genes, and 11 ncRNA genes) were identified in its whole genome sequence. On this basis, a series of potential genes involved in steroid metabolism and stress responses of SJTR1 were predicted. It is the first report of strain with the degradation capability to estrogens. This work could enrich the genome sources of the estrogen-degrading strains and promote the degradation mechanism study of 17β-estradiol in bacteria.