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- W2091114749 abstract "MTH1203, a β-CASP metallo-β-lactamase family nuclease from the archaeon Methanothermobacter thermautotrophicus, was identified as a putative nuclease that might contribute to RNA processing. The crystal structure of MTH1203 reveals that, in addition to the metallo-β-lactamase nuclease and the β-CASP domains, it contains two contiguous KH domains that are unique to MTH1203 and its orthologs. RNA-binding experiments indicate that MTH1203 preferentially binds U-rich sequences with a dissociation constant in the micromolar range. In vitro nuclease activity assays demonstrated that MTH1203 is a zinc-dependent nuclease. MTH1203 is also shown to be a dimer and, significantly, this dimerization enhances the nuclease activity. Transcription termination in archaea produces mRNA transcripts with U-rich 3' ends that could be degraded by MTH1203 considering its RNA-binding specificity. We hypothesize that this nuclease degrades mRNAs of proteins targeted for degradation and so regulates archaeal RNA turnover, possibly in concert with the exosome." @default.
- W2091114749 created "2016-06-24" @default.
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- W2091114749 date "2011-05-01" @default.
- W2091114749 modified "2023-09-26" @default.
- W2091114749 title "Structure and Activity of a Novel Archaeal β-CASP Protein with N-Terminal KH Domains" @default.
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- W2091114749 doi "https://doi.org/10.1016/j.str.2011.03.002" @default.
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