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The neuronal actin-binding proteins, neurabin I and neurabin II, recruit specific isoforms of protein phosphatase-1 catalytic subunits.

Publication ,  Journal Article
Terry-Lorenzo, RT; Carmody, LC; Voltz, JW; Connor, JH; Li, S; Smith, FD; Milgram, SL; Colbran, RJ; Shenolikar, S
Published in: J Biol Chem
August 2, 2002

Neurabins are protein phosphatase-1 (PP1) targeting subunits that are highly concentrated in dendritic spines and post-synaptic densities. Immunoprecipitation of neurabin I and neurabin II/spinophilin from rat brain extracts sedimented PP1gamma1 and PP1alpha but not PP1beta. In vitro studies showed that recombinant peptides representing central regions of neurabins also preferentially bound PP1gamma1 and PP1alpha from brain extracts and associated poorly with PP1beta. Analysis of PP1 binding to chimeric neurabins suggested that sequences flanking a conserved PP1-binding motif altered their selectivity for PP1beta and their activity as regulators of PP1 in vitro. Assays using recombinant PP1 catalytic subunits and a chimera of PP1 and protein phosphatase-2A indicated that the C-terminal sequences unique to the PP1 isoforms contributed to their recognition by neurabins. Collectively, the results from several different in vitro assays established the rank order of PP1 isoform selection by neurabins to be PP1gamma1 > PP1alpha > PP1beta. This PP1 isoform selectivity was confirmed by immunoprecipitation of neurabin I and II from brain extracts from wild type and mutant PP1gamma null mice. In the absence of PP1gamma1, both neurabins showed enhanced association with PP1alpha but not PP1beta. These studies identified some of the structural determinants in PP1 and neurabins that together contribute to preferential targeting of PP1gamma1 and PP1alpha to the mammalian synapse.

Duke Scholars

Published In

J Biol Chem

DOI

ISSN

0021-9258

Publication Date

August 2, 2002

Volume

277

Issue

31

Start / End Page

27716 / 27724

Location

United States

Related Subject Headings

  • Recombinant Proteins
  • Recombinant Fusion Proteins
  • Rats
  • Protein Subunits
  • Protein Phosphatase 2
  • Protein Phosphatase 1
  • Plasmids
  • Phosphoprotein Phosphatases
  • Nerve Tissue Proteins
  • Molecular Sequence Data
 

Citation

APA
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MLA
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Terry-Lorenzo, R. T., Carmody, L. C., Voltz, J. W., Connor, J. H., Li, S., Smith, F. D., … Shenolikar, S. (2002). The neuronal actin-binding proteins, neurabin I and neurabin II, recruit specific isoforms of protein phosphatase-1 catalytic subunits. J Biol Chem, 277(31), 27716–27724. https://doi.org/10.1074/jbc.M203365200
Terry-Lorenzo, Ryan T., Leigh C. Carmody, James W. Voltz, John H. Connor, Shi Li, F Donelson Smith, Sharon L. Milgram, Roger J. Colbran, and Shirish Shenolikar. “The neuronal actin-binding proteins, neurabin I and neurabin II, recruit specific isoforms of protein phosphatase-1 catalytic subunits.J Biol Chem 277, no. 31 (August 2, 2002): 27716–24. https://doi.org/10.1074/jbc.M203365200.
Terry-Lorenzo RT, Carmody LC, Voltz JW, Connor JH, Li S, Smith FD, et al. The neuronal actin-binding proteins, neurabin I and neurabin II, recruit specific isoforms of protein phosphatase-1 catalytic subunits. J Biol Chem. 2002 Aug 2;277(31):27716–24.
Terry-Lorenzo, Ryan T., et al. “The neuronal actin-binding proteins, neurabin I and neurabin II, recruit specific isoforms of protein phosphatase-1 catalytic subunits.J Biol Chem, vol. 277, no. 31, Aug. 2002, pp. 27716–24. Pubmed, doi:10.1074/jbc.M203365200.
Terry-Lorenzo RT, Carmody LC, Voltz JW, Connor JH, Li S, Smith FD, Milgram SL, Colbran RJ, Shenolikar S. The neuronal actin-binding proteins, neurabin I and neurabin II, recruit specific isoforms of protein phosphatase-1 catalytic subunits. J Biol Chem. 2002 Aug 2;277(31):27716–27724.

Published In

J Biol Chem

DOI

ISSN

0021-9258

Publication Date

August 2, 2002

Volume

277

Issue

31

Start / End Page

27716 / 27724

Location

United States

Related Subject Headings

  • Recombinant Proteins
  • Recombinant Fusion Proteins
  • Rats
  • Protein Subunits
  • Protein Phosphatase 2
  • Protein Phosphatase 1
  • Plasmids
  • Phosphoprotein Phosphatases
  • Nerve Tissue Proteins
  • Molecular Sequence Data