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Prostatic acid phosphatase, a neglected ectonucleotidase.

Herbert Zimmermann1

  • 1Institute of Cell Biology and Neuroscience, Biocenter, Goethe-University, 60438, Frankfurt, Germany, h.zimmermann@bio.uni-frankurt.de.

Purinergic Signalling
|March 27, 2009
PubMed
Summary
This summary is machine-generated.

A newly discovered variant of prostatic acid phosphatase (PAP) acts as an ecto-5'-nucleotidase, potentially contributing to chronic pain. This finding expands our understanding of extracellular adenosine production beyond known enzymes.

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Area of Science:

  • Biochemistry
  • Enzymology
  • Neuroscience

Background:

  • Prostatic acid phosphatase (PAP) is a well-established diagnostic marker for prostate cancer.
  • Extracellular adenosine production is crucial in various physiological and pathological processes.
  • Previous research focused on PAP's role in prostate cancer and its phosphomonoesterase activity.

Purpose of the Study:

  • To investigate the enzymatic activities and distribution of a newly identified splice variant of prostatic acid phosphatase (PAP).
  • To explore the potential role of this PAP variant in extracellular adenosine production and chronic pain.
  • To re-evaluate the contribution of PAP to ecto-5'-nucleotidase activity.

Main Methods:

  • Analysis of enzymatic activity of the PAP splice variant.
  • Investigating the distribution of the membrane-bound PAP variant.
  • Reviewing existing literature on PAP and ecto-5'-nucleotidases.

Main Results:

  • A membrane-bound splice variant of PAP exhibits significant ecto-5'-nucleotidase activity.
  • This variant is widely distributed and implicated in the mechanisms of chronic pain.
  • Unlike the soluble form, the variant specifically hydrolyzes nucleoside monophosphates.

Conclusions:

  • Prostatic acid phosphatase (PAP) possesses previously unrecognized ecto-5'-nucleotidase activity through its membrane-bound splice variant.
  • This finding necessitates considering PAP in studies of extracellular adenosine production, alongside other ecto-5'-nucleotidases.
  • The role of this PAP variant in chronic pain warrants further investigation.