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Intracellular PAF-Acetylhydrolase Type I.

Mitsuharu Hattori1, Hiroyuki Arai2

  • 1Department of Biomedical Science, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya, Aichi, Japan.

The Enzymes
|November 28, 2015
PubMed
Summary

Platelet-activating factor acetylhydrolase (PAF-AH) Ib is a key enzyme in cell biology. This review summarizes its structure, functions, and roles in various human diseases, highlighting areas needing further research.

Keywords:
LIS1Neuronal migrationPAFPAF-acetylhydrolaseSpermatogenesis

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Area of Science:

  • Cell Biology
  • Neurobiology
  • Biochemistry

Background:

  • Platelet-activating factor (PAF) is a phospholipid mediator.
  • PAF-acetylhydrolase (PAF-AH) inactivates PAF by hydrolyzing its acetyl group.
  • PAF-AH Ib, found in mammalian cells, has three subunits (α1, α2, β).

Purpose of the Study:

  • To summarize the structure and functions of PAF-AH Ib and its subunits.
  • To discuss the involvement of PAF-AH Ib in human diseases.
  • To identify knowledge gaps regarding PAF-AH Ib's catalytic activity and substrates.

Main Methods:

  • Literature review and synthesis of existing research on PAF-AH Ib.
  • Analysis of studies linking PAF-AH Ib subunits to cellular functions and diseases.
  • Examination of the structural components and enzymatic activity of PAF-AH Ib.

Main Results:

  • PAF-AH Ib subunits are implicated in numerous biological processes and diseases, including neurodevelopment, Alzheimer's, bipolar disorder, and cancer.
  • The β subunit is linked to Miller-Dieker lissencephaly.
  • Over 20 molecules bind to PAF-AH Ib subunits, but the primary substrate and role of catalytic activity remain largely unclear.

Conclusions:

  • PAF-AH Ib is a multifunctional enzyme with significant implications across cell biology and human health.
  • Further research is needed to elucidate the precise mechanisms of PAF-AH Ib's catalytic activity and substrate specificity in disease contexts.
  • Understanding PAF-AH Ib's role is crucial for potential therapeutic interventions in associated disorders.