Abstract
Polymerase chain reaction (PCR) products similar to protein serine/threonine family I phosphatase genes were identified in five strains of cyanobacteria from three species. The gene for one of these protein phosphatase PCR products, pp1-cyano2 from Microcystis aeruginosa UTEX 2063, was cloned and sequenced. The deduced protein sequence PP1-cyano2 contains 264 amino acid residues (∼30.3 kDa). In its N-terminal region, PP1-cyano2 had a GDXXHG(X)nGDXXDRG(X)nGNHE (nP23) sequence that is well-conserved in all protein serine/threonine family I phosphatases. Of 19 amino acid residues important for either metal binding, structure of the active site, or catalysis in eukaryotic PP1, 18 were present in PP1-cyano2. Reverse-transcription-PCR results showed that pp1-cyano2 was expressed under laboratory culture conditions.
Similar content being viewed by others
Author information
Authors and Affiliations
Additional information
Received: 6 January 1997 / Accepted: 27 June 1997
Rights and permissions
About this article
Cite this article
Shi, L., Carmichael, W. pp1-cyano2, a protein serine/threonine phosphatase 1 gene from the cyanobacterium Microcystis aeruginosa UTEX 2063. Arch Microbiol 168, 528–531 (1997). https://doi.org/10.1007/s002030050531
Issue Date:
DOI: https://doi.org/10.1007/s002030050531