Calcium/calmodulin-dependent protein kinase II inhibitor protein: Localization of isoforms in rat brain

Bill Chang, S. Mukherji, Thomas Soderling

Research output: Contribution to journalArticle

77 Citations (Scopus)

Abstract

A second isoform of Ca2+/calmodulin-dependent-kinase II inhibitor protein (CaM-KIIN) has been identified using the yeast two-hybrid screen. The 1.8 kb message encodes a 78 residue CaM-KIINα that is 65% identical in its putative open-reading frame and 95% identical in its inhibitory domain to the previously characterized CaM-KIINβ. CaM-KIINα exhibits inhibitory properties towards recombinant mouse CaM-kinase IIα indistinguishable from CaM-KIINβ. The 27 amino acid inhibitory peptide (CaM-KIIN tide) derived from CaM-KIIN has the ability to inhibit brain CaM-kinase II activity from multiple organisms including rat, Drosophila and goldfish. Northern analysis of various rat tissues indicates that CaM-KIINα is specific to brain whereas CaM-KIINβ message is also present in testis. In situ hybridization shows a general distribution of both isoforms in rat brain with stronger localization of CaM-KIINβ in cerebellum and hindbrain and CaM-KIINα in frontal cortex, hippocampus and inferior colliculus. An antibody that recognizes both isoforms shows a distribution of CaM-KIIN in rat brain that correlates with immunoreactivity of CaM-kinase II. In cultured mature hippocampal neurons, CaM-KIIN is present in cell bodies and dendrites but, unlike CaM-kinase II, does not display punctate staining at synapses. These results suggest a localized function for CaM-KIIN in inhibiting specialized pools of CaM-kinase II.

Original languageEnglish (US)
Pages (from-to)767-777
Number of pages11
JournalNeuroscience
Volume102
Issue number4
DOIs
StatePublished - Feb 14 2001

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Calcium-Calmodulin-Dependent Protein Kinase Type 2
Calcium-Calmodulin-Dependent Protein Kinases
Protein Kinase Inhibitors
Protein Isoforms
Brain
Inferior Colliculi
Rhombencephalon
Goldfish

Keywords

  • CaM-kinase II
  • Immunocytochemistry
  • Kinase inhibitor
  • Protein phosphorylation

ASJC Scopus subject areas

  • Neuroscience(all)

Cite this

Calcium/calmodulin-dependent protein kinase II inhibitor protein : Localization of isoforms in rat brain. / Chang, Bill; Mukherji, S.; Soderling, Thomas.

In: Neuroscience, Vol. 102, No. 4, 14.02.2001, p. 767-777.

Research output: Contribution to journalArticle

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