Protein serine/threonine phosphatases; an expanding family

FEBS Lett. 1990 Aug 1;268(2):355-9. doi: 10.1016/0014-5793(90)81285-v.

Abstract

Five protein serine/threonine phosphatases (PP) have been identified by cloning cDNA from mammalian and Drosophila libraries. These novel enzymes, which have not yet been detected by the techniques of protein chemistry and enzymology, are termed PPV, PP2Bw, PPX, PPY and PPZ. The complete amino acid sequences of PPX, PPY and PPZ and an almost complete sequence of PPV are presented. In the catalytic domain PPV and PPX are more similar to PP2A (57-69% identity) than PP1 (45-49% identity), while PPY and PPZ are more similar to PP1 (66-68% identity) than PP2A (44% identity). The cDNA for PP2Bw encodes a novel Ca2+/calmodulin-dependent protein phosphatase only 62% identical to PP2B in the catalytic domain. Approaches for determining the cellular functions of these protein phosphatases are discussed.

Publication types

  • Research Support, Non-U.S. Gov't
  • Review

MeSH terms

  • Amino Acid Sequence
  • Animals
  • Biological Evolution
  • Cloning, Molecular
  • Molecular Sequence Data
  • Multigene Family*
  • Phosphoprotein Phosphatases* / genetics
  • Phosphoprotein Phosphatases* / metabolism
  • Sequence Homology, Nucleic Acid
  • Serine*
  • Threonine*

Substances

  • Threonine
  • Serine
  • Phosphoprotein Phosphatases