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Calmodulin acetylation: A modification to remember.

Chiho Sugimoto1, A J Robison1

  • 1Department of Physiology, Michigan State University, East Lansing, Michigan, USA.

The Journal of Biological Chemistry
|October 4, 2021
PubMed
Summary
This summary is machine-generated.

Researchers discovered a new molecular pathway involving calmodulin acetylation, driven by SRC3, that is crucial for forming new memories and strengthening synaptic connections in the hippocampus. This finding enhances our understanding of memory formation mechanisms.

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Cellular Biology

Background:

  • Memory formation relies on synaptic plasticity in the hippocampus.
  • The precise molecular mechanisms driving these synaptic changes are not fully understood.

Purpose of the Study:

  • To elucidate the molecular players involved in synaptic alterations during memory formation.
  • To identify novel posttranslational modifications regulating synaptic function.

Main Methods:

  • Investigated the role of lysine acetyltransferase SRC3 in synaptic plasticity.
  • Examined the acetylation of calmodulin (CaM) and its impact on CaMKII activation.
  • Assessed the necessity and sufficiency of this pathway for long-term potentiation (LTP) and fear memory.

Main Results:

  • SRC3 was identified as a key regulator of CaM acetylation.
  • CaM acetylation was shown to modulate CaM activity and CaMKII activation.
  • The SRC3-CaM acetylation pathway is essential for CA3→CA1 synapse LTP and fear memory.

Conclusions:

  • A novel molecular pathway involving SRC3-mediated calmodulin acetylation is critical for memory formation.
  • This pathway regulates synaptic strength and is vital for fear memory consolidation.
  • The findings provide a new framework for studying acetylation's role in neuronal function.