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Gene cloning and expression and characterization of a toxin-sensitive protein phosphatase from the methanogenic archaeon Methanosarcina thermophila TM-1.

By B Solow, J C Young and P J Kennelly


With oligonucleotides modelled after conserved regions within the protein-serine/threonine phosphatases (PPs) of the PP1/2A/2B superfamily, the gene for the archaeal protein phosphatase PP1-arch2 was identified, cloned, and sequenced from the methanogenic archaeon Methanosarcina thermophila TM-1. The DNA-derived amino acid sequence of PP1-arch2 exhibited a high degree of sequence identity, 27 to 31%, with members of the PP1/2A/2B superfamily such as PP1-arch1 from Sulfolobus solfataricus, PP1alpha from rats, PP2A from Saccharomyces cerevisiae, and PP2B from humans. The activity of the recombinant PP1-arch2 was sensitive to several naturally occurring microbial toxins known to potently inhibit eucaryal PP1 and PP2A, including microcystin-LR, okadaic acid, tautomycin, and calyculin A

Topics: Research Article
Year: 1997
DOI identifier: 10.1128/jb.179.16.5072-5075.1997
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Provided by: PubMed Central
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