What is the clinical evidence from this study?

Study design: Other. Intervention: RACK1 cloning and characterization. Primary outcome: PKC binding to RACK1.

What question did this study set out to answer?

The aim is to clone a cDNA that encodes RACK1, a protein that binds activated protein kinase C (PKC).

February 1, 1994Proceedings of the National Academy of SciencesOpen Access

Cloning of an intracellular receptor for protein kinase C: a homolog of the beta subunit of G proteins.

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Key result

RACK1, a cloned 36-kDa protein homologous to the beta subunit of G proteins, binds activated protein kinase C in a specific and saturable manner.

Population

Rat brain (Sprague-Dawley) cDNA expression library and recombinant RACK1 expressed in E. coli

Design

Preclinical

Authors

DRDorit RonHoward Hughes Medical Institute CCC H ChenStanford University JCJohn CaldwellInstitute of Cancer Research

Discussion

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Implication

Cloning cardiac RACKs enables molecular dissection of PKC anchoring; leaves open their role in heart disease.

Key Points

The aim is to clone a cDNA that encodes RACK1, a protein that binds activated protein kinase C (PKC).
Cloned a cDNA for a 36-kDa protein identified as RACK1.
Tested PKC binding in vitro with various peptides and activators.
Analyzed binding specificity compared to other protein kinases.
RACK1 specifically binds activated PKC with saturation behavior (binding only in the presence of PKC activators).
Inhibition studies revealed that binding was not mediated by substrate interactions (pseudosubstrate peptide did not inhibit binding).
RACK1 shows homology to the beta subunit of G proteins, suggesting its role in PKC-mediated signaling.

Structured PICO

Population

Rat brain (Sprague-Dawley) cDNA expression library and recombinant RACK1 expressed in E. coli

Intervention

Cloning and biochemical characterization of RACK1 (receptor for activated C-kinase)

Outcome

Identification, cloning, and binding characterization of a PKC-binding protein (RACK1)surrogate

The cloning of RACK1 provides a molecular basis for the intracellular anchoring of activated protein kinase C, which is critical for PKC-mediated signal transduction.

Limitations

In vitro data only

Cite This Study

Ron et al. (1994) studied this question. RACK1 cloning and characterization was evaluated on PKC binding to RACK1. RACK1, a cloned 36-kDa protein homologous to the beta subunit of G proteins, binds activated protein kinase C in a specific and saturable manner.

synapsesocial.com/papers/6a6d458835aa2c282cdfd9a9 https://doi.org/10.1073/pnas.91.3.839

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Cloning of an intracellular receptor for protein kinase C: a homolog of the beta subunit of G proteins.

Discussion

Member takes

Implication

Key Points

Structured PICO

Limitations

Cite This Study

Cloning of an intracellular receptor for protein kinase C: a homolog of the beta subunit of G proteins.

Discussion

Member takes

Implication

Key Points

Structured PICO

Limitations

Cite This Study

Also Consider

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