Journal
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
Volume 11, Issue 3, Pages 896-911Publisher
MDPI
DOI: 10.3390/ijms11030896
Keywords
degradation; microcystin-LR; microcystin-RR; cyanobacteria; EMS; mlrA
Funding
- National Natural Science Foundation of China [30870452]
- Special Project of National Grand Fundamental Research Pre-973 Program of China [2008CB117001]
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A bacterial strain EMS with the capability of degrading microcystins (MCs) was isolated from Lake Taihu, China. The bacterium was tentatively identified as a Stenotrophomonas sp. The bacterium could completely consume MC-LR and MC-RR within 24 hours at a concentration of 0.7 mu g/mL and 1.7 mu g/mL, respectively. The degradation of MC-LR and MC-RR by EMS occurred preferentially in an alkaline environment. In addition, mlrA gene involved in the degradation of MC-LR and MC-RR was detected in EMS. Due to the limited literature this gene has rare homologues. Sequencing analysis of the translated protein from mlrA suggested that MlrA might be a transmembrane protein, which suggests a possible new protease family having unique function.
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