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Updated: Sep 16, 2025

Identification of Inositol Phosphate or Phosphoinositide Interacting Proteins by Affinity Chromatography Coupled to Western Blot or Mass Spectrometry
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Identification of Inositol Phosphate or Phosphoinositide Interacting Proteins by Affinity Chromatography Coupled to Western Blot or Mass Spectrometry

Published on: July 26, 2019

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The inositol 5-phosphatases OCRL and INPP5B: Cellular functions and roles in disease

Aloka de Sa1, Gaoyu Li1, Connor Byrne1

  • 1Faculty of Biology, Medicine and Health, University of Manchester, Michael Smith Building, Oxford Road, Manchester M13 9PT, UK.

Biochimica Et Biophysica Acta. Molecular and Cell Biology of Lipids
|July 6, 2025
PubMed

Insights

OCRL and INPP5B are enzymes that regulate cellular processes by hydrolyzing PI(4,5)P2. Understanding their functions and similarities/differences is key to developing treatments for Lowe syndrome and Dent-2 disease.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Cell Biology

Background:

  • OCRL and INPP5B are conserved inositol 5-phosphatases.
  • They hydrolyze phosphatidylinositol 4,5-bisphosphate (PI(4,5)P2), a critical regulator of cellular functions.
  • Mutations in OCRL cause Lowe syndrome and Dent-2 disease, affecting the eye, brain, and kidney.

Purpose of the Study:

  • To provide a comprehensive overview of OCRL and INPP5B biology.
  • To compare their subcellular localization, interaction partners, and cellular functions.
  • To explore the mechanisms of Lowe syndrome and Dent-2 disease and INPP5B's role in disease outcomes.

Main Methods:

  • Literature review and synthesis of existing research on OCRL and INPP5B.
  • Comparative analysis of protein functions, localizations, and interaction networks.
  • Discussion of disease pathogenesis and potential therapeutic targets.

Main Results:

  • OCRL and INPP5B share significant similarities in their biological properties.
  • Key differences in their functions and regulation were identified.
  • The study highlights INPP5B's potential influence on the phenotypic outcomes of OCRL-related disorders.

Conclusions:

  • Understanding OCRL and INPP5B biology deepens insights into cellular mechanisms.
  • This knowledge is crucial for designing novel therapeutic strategies for Lowe syndrome, Dent-2 disease, and potentially other related conditions.

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